To display general information about Open Shortest Path First (OSPF) routing processes, use the
showipospf command in user EXEC or privileged EXEC mode.
showipospf [process-id]
Syntax Description
process-id
(Optional) Process ID. If this argument is included, only information for the specified routing process is included.
Command Modes
User EXEC Privileged EXEC
Command History
Mainline Release
Modification
10.0
This command was introduced.
15.0(1)M
This command was integrated into Cisco IOS Release 15.0(1)M.
0S Release
Modification
12.0(25)S
This command was integrated into Cisco IOS Release 12.0(25)S and the output was expanded to display link-state advertisement (LSA) throttling timers.
12.0(31)S
Support for the Bidirectional Forwarding Detection (BFD) feature was added.
S Release
Modification
12.2(14)S
Support for displaying packet pacing timers was added.
12.2(28)SB
This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(18)SXE
This command was integrated into Cisco IOS Release 12.2(18)SXE and support for the BFD feature was added.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
T Release
Modification
12.2(4)T
This command was modified to show packet pacing timers in the displayed output.
12.2(15)T
This command was modified to show additional information if the OSPF Forwarding Address Suppression in Type-5 LSAs feature is configured.
12.3(2)T
The output of this command was expanded to display LSA throttling timers and the limit on redistributed routes.
12.4(4)T
Support for the BFD feature was added.
Examples
The following is sample output from the
showipospf command when entered without a specific OSPF process ID:
Router# show ip ospf
Routing Process "ospf 201" with ID 10.0.0.1 and Domain ID 10.20.0.1
Supports only single TOS(TOS0) routes
Supports opaque LSA
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs
LSA group pacing timer 100 secs
Interface flood pacing timer 55 msecs
Retransmission pacing timer 100 msecs
Number of external LSA 0. Checksum Sum 0x0
Number of opaque AS LSA 0. Checksum Sum 0x0
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
External flood list length 0
Area BACKBONE(0)
Number of interfaces in this area is 2
Area has message digest authentication
SPF algorithm executed 4 times
Area ranges are
Number of LSA 4. Checksum Sum 0x29BEB
Number of opaque link LSA 0. Checksum Sum 0x0
Number of DCbitless LSA 3
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
Area 172.16.26.0
Number of interfaces in this area is 0
Area has no authentication
SPF algorithm executed 1 times
Area ranges are
192.168.0.0/16 Passive Advertise
Number of LSA 1. Checksum Sum 0x44FD
Number of opaque link LSA 0. Checksum Sum 0x0
Number of DCbitless LSA 1
Number of indication LSA 1
Number of DoNotAge LSA 0
Flood list length 0
Examples
The following is sample output from the
showipospfcommand to verify that the BFD feature has been enabled for OSPF process 123. The relevant command output is shown in bold in the output.
Router# show ip ospf
Routing Process "ospf 123" with ID 172.16.10.1
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Incremental-SPF disabled
Minimum LSA interval 5 secs
Minimum LSA arrival 1000 msecs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x000000
Number of opaque AS LSA 0. Checksum Sum 0x000000
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
External flood list length 0
BFD is enabled
Area BACKBONE(0)
Number of interfaces in this area is 2
Area has no authentication
SPF algorithm last executed 00:00:03.708 ago
SPF algorithm executed 27 times
Area ranges are
Number of LSA 3. Checksum Sum 0x00AEF1
Number of opaque link LSA 0. Checksum Sum 0x000000
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
The table below describes the significant fields shown in the display.
Table 1 show ip ospf Field Descriptions
Field
Description
Routing process “ospf 201” with ID 10.0.0.1
Process ID and OSPF router ID.
Supports...
Number of types of service supported (Type 0 only).
SPF schedule delay
Delay time (in seconds) of SPF calculations.
Minimum LSA interval
Minimum interval (in seconds) between link-state advertisements.
LSA group pacing timer
Configured LSA group pacing timer (in seconds).
Interface flood pacing timer
Configured LSA flood pacing timer (in milliseconds).
Retransmission pacing timer
Configured LSA retransmission pacing timer (in milliseconds).
Number of external LSA
Number of external link-state advertisements.
Number of opaque AS LSA
Number of opaque link-state advertisements.
Number of DCbitless external and opaque AS LSA
Number of demand circuit external and opaque link-state advertisements.
Number of DoNotAge external and opaque AS LSA
Number of do not age external and opaque link-state advertisements.
Number of areas in this router is
Number of areas configured for the router.
External flood list length
External flood list length.
BFD is enabled
BFD has been enabled on the OSPF process.
The following is an excerpt of output from the
showipospf command when the OSPF Forwarding Address Suppression in Type-5 LSAs feature is configured:
Router# show ip ospf
.
.
.
Area 2
Number of interfaces in this area is 4
It is a NSSA area
Perform type-7/type-5 LSA translation, suppress forwarding address
.
.
.
Routing Process "ospf 1" with ID 192.168.0.1
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Incremental-SPF disabled
Minimum LSA interval 5 secs
Minimum LSA arrival 1000 msecs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x0
Number of opaque AS LSA 0. Checksum Sum 0x0
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 0. 0 normal 0 stub 0 nssa
External flood list length 0
The table below describes the significant fields shown in the display.
Table 2 show ip ospf Field Descriptions
Field
Description
Area
OSPF area and tag.
Number of interfaces...
Number of interfaces configured in the area.
It is...
Possible types are internal, area border, or autonomous system boundary.
Routing process “ospf 1” with ID 192.168.0.1
Process ID and OSPF router ID.
Supports...
Number of types of service supported (Type 0 only).
Initial SPF schedule delay
Delay time of SPF calculations at startup.
Minimum hold time
Minimum hold time (in milliseconds) between consecutive SPF calculations.
Maximum wait time
Maximum wait time (in milliseconds) between consecutive SPF calculations.
Incremental-SPF
Status of incremental SPF calculations.
Minimum LSA...
Minimum time interval (in seconds) between link-state advertisements, and minimum arrival time (in milliseconds) of link-state advertisements,
LSA group pacing timer
Configured LSA group pacing timer (in seconds).
Interface flood pacing timer
Configured LSA flood pacing timer (in milliseconds).
Retransmission pacing timer
Configured LSA retransmission pacing timer (in milliseconds).
Number of...
Number and type of link-state advertisements that have been received.
Number of external LSA
Number of external link-state advertisements.
Number of opaque AS LSA
Number of opaque link-state advertisements.
Number of DCbitless external and opaque AS LSA
Number of demand circuit external and opaque link-state advertisements.
Number of DoNotAge external and opaque AS LSA
Number of do not age external and opaque link-state advertisements.
Number of areas in this router is
Number of areas configured for the router listed by type.
External flood list length
External flood list length.
The following is sample output from the
showipospf command. In this example, the user had configured the
redistributionmaximum-prefix command to set a limit of 2000 redistributed routes. SPF throttling was configured with the
timersthrottlespf command.
Router# show ip ospf 1
Routing Process "ospf 1" with ID 10.0.0.1
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
It is an autonomous system boundary router
Redistributing External Routes from,
static, includes subnets in redistribution
Maximum limit of redistributed prefixes 2000
Threshold for warning message 75%
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
The table below describes the significant fields shown in the display.
Table 3 show ip ospf Field Descriptions
Field
Description
Routing process “ospf 1” with ID 10.0.0.1
Process ID and OSPF router ID.
Supports ...
Number of Types of Service supported.
It is ...
Possible types are internal, area border, or autonomous system boundary router.
Redistributing External Routes from
Lists of redistributed routes, by protocol.
Maximum limit of redistributed prefixes
Value set in the
redistributionmaximum-prefix command to set a limit on the number of redistributed routes.
Threshold for warning message
Percentage set in the
redistributionmaximum-prefix command for the threshold number of redistributed routes needed to cause a warning message. The default is 75 percent of the maximum limit.
Initial SPF schedule delay
Delay (in milliseconds) before initial SPF schedule for SPF throttling. Configured with the
timersthrottlespf command.
Minimum hold time between two consecutive SPFs
Minimum hold time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the
timersthrottlespf command.
Maximum wait time between two consecutive SPFs
Maximum wait time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the
timersthrottlespf command.
Number of areas
Number of areas in router, area addresses, and so on.
The following is sample output from the
showipospf command. In this example, the user had configured LSA throttling, and those lines of output are displayed in bold.
Router# show ip ospf 1
Routing Process "ospf 4" with ID 10.10.24.4
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Incremental-SPF disabled
Initial LSA throttle delay 100 msecs Minimum hold time for LSA throttle 10000 msecsMaximum wait time for LSA throttle 45000 msecs
Minimum LSA arrival 1000 msecs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x0
Number of opaque AS LSA 0. Checksum Sum 0x0
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
External flood list length 0
Area 24
Number of interfaces in this area is 2
Area has no authentication
SPF algorithm last executed 04:28:18.396 ago
SPF algorithm executed 8 times
Area ranges are
Number of LSA 4. Checksum Sum 0x23EB9
Number of opaque link LSA 0. Checksum Sum 0x0
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
The following is sample
showipospfcommand. In this example, the user had configured the
redistributionmaximum-prefix command to set a limit of 2000 redistributed routes. SPF throttling was configured with the
timersthrottlespf command.
Router# show ip ospf 1
Routing Process "ospf 1" with ID 192.168.0.0
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
It is an autonomous system boundary router
Redistributing External Routes from,
static, includes subnets in redistribution
Maximum limit of redistributed prefixes 2000
Threshold for warning message 75%
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
The table below describes the significant fields shown in the display.
Table 4 show ip ospf Field Descriptions
Field
Description
Routing process “ospf 1” with ID 192.168.0.0.
Process ID and OSPF router ID.
Supports ...
Number of TOS supported.
It is ...
Possible types are internal, area border, or autonomous system boundary routers.
Redistributing External Routes from
Lists of redistributed routes, by protocol.
Maximum limit of redistributed prefixes
Value set in the
redistributionmaximum-prefix command to set a limit on the number of redistributed routes.
Threshold for warning message
Percentage set in the
redistributionmaximum-prefix command for the threshold number of redistributed routes needed to cause a warning message. The default is 75 percent of the maximum limit.
Initial SPF schedule delay
Delay (in milliseconds) before the initial SPF schedule for SPF throttling. Configured with the
timersthrottlespf command.
Minimum hold time between two consecutive SPFs
Minimum hold time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the
timersthrottlespf command.
Maximum wait time between two consecutive SPFs
Maximum wait time (in milliseconds) between two consecutive SPF calculations for SPF throttling. Configured with the
timersthrottlespf command.
Number of areas
Number of areas in router, area addresses, and so on.
The following is sample output from the
showipospf command. In this example, the user had configured LSA throttling, and those lines of output are displayed in bold.
Router# show ip ospf 1
Routing Process "ospf 4" with ID 10.10.24.4
Supports only single TOS(TOS0) routes
Supports opaque LSA
Supports Link-local Signaling (LLS)
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Incremental-SPF disabled
Initial LSA throttle delay 100 msecs Minimum hold time for LSA throttle 10000 msecs Maximum wait time for LSA throttle 45000 msecs
Minimum LSA arrival 1000 msecs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x0
Number of opaque AS LSA 0. Checksum Sum 0x0
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
External flood list length 0
Area 24
Number of interfaces in this area is 2
Area has no authentication
SPF algorithm last executed 04:28:18.396 ago
SPF algorithm executed 8 times
Area ranges are
Number of LSA 4. Checksum Sum 0x23EB9
Number of opaque link LSA 0. Checksum Sum 0x0
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
show ip ospf border-routers
To display the internal Open Shortest Path First (OSPF) routing table entries to an Area Border Router (ABR) and Autonomous System Boundary Router (ASBR), use the
showipospfborder-routers command in privileged EXEC mode.
showipospfborder-routers
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Release
Modification
10.0
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Examples
The following is sample output from the
showipospfborder-routers command:
Router# show ip ospf border-routers
OSPF Process 109 internal Routing Table
Codes: i - Intra-area route, I - Inter-area route
i 192.168.97.53 [10] via 172.16.1.53, Serial0, ABR, Area 0.0.0.3, SPF 3
i 192.168.103.51 [10] via 192.168.96.51, Serial0, ABR, Area 0.0.0.3, SPF 3
I 192.168.103.52 [22] via 192.168.96.51, Serial0, ASBR, Area 0.0.0.3, SPF 3
I 192.168.103.52 [22] via 172.16.1.53, Serial0, ASBR, Area 0.0.0.3, SPF 3
The table below describes the significant fields shown in the display.
Table 5
showipospfborder-routers Field Descriptions
Field
Description
192.168.97.53
Router ID of the destination.
[10]
Cost of using this route.
via 172.16.1.53
Next hop toward the destination.
Serial0
Interface type for the outgoing interface.
ABR
The router type of the destination; it is either an ABR or ASBR or both.
Area
The area ID of the area from which this route is learned.
SPF 3
The internal number of the shortest path first (SPF) calculation that installs this route.
show ip ospf database
To display lists of information related to the Open Shortest Path First (OSPF) database for a specific router, use the
showipospfdatabase command in EXEC mode.
(Optional) Internal identification. It is locally assigned and can be any positive integer. The number used here is the number assigned administratively when enabling the OSPF routing process.
area-id
(Optional) Area number associated with the OSPF address range defined in the
network router configuration command used to define the particular area.
adv-router [ip-address
(Optional) Displays all the LSAs of the specified router. If no IP address is included, the information is about the local router itself (in this case, the same as
self-originate).
link-state-id
(Optional) Portion of the Internet environment that is being described by the advertisement. The value entered depends on the advertisement’s LS type. It must be entered in the form of an IP address.
When the link state advertisement is describing a network, the
link-state-id can take one of two forms:
The network’s IP address (as in type 3 summary link advertisements and in autonomous system external link advertisements).
A derived address obtained from the link state ID. (Note that masking a network links advertisement’s link state ID with the network’s subnet mask yields the network’s IP address.)
When the link state advertisement is describing a router, the link state ID is always the described router’s OSPF router ID.
When an autonomous system external advertisement (LS Type = 5) is describing a default route, its link state ID is set to Default Destination (0.0.0.0).
asbr-summary
(Optional) Displays information only about the autonomous system boundary router summary LSAs.
database-summary
(Optional) Displays how many of each type of LSA for each area there are in the database, and the total.
external
(Optional) Displays information only about the external LSAs.
network
(Optional) Displays information only about the network LSAs.
nssa-external
(Optional) Displays information only about the NSSA external LSAs.
router
(Optional) Displays information only about the router LSAs.
self-originate
(Optional) Displays only self-originated LSAs (from the local router).
summary
(Optional) Displays information only about the summary LSAs.
Command Modes
EXEC
Command History
Release
Modification
10.0
This command was introduced.
11.0
The
database-summary keyword was added.
12.0
The following keywords were added:
self-originate
adv-router
12.0(25)S
The output of the
showipospfdatabasedatabase-summarycommand was increased to include Self-originated Type-7 and Self-originated Type-5 output.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
The various forms of this command deliver information about different OSPF link state advertisements.
Examples
The following is sample output from the
showipospfdatabase command when no arguments or keywords are used:
Router# show ip ospf database
OSPF Router with id(192.168.239.66) (Process ID 300)
Displaying Router Link States(Area 0.0.0.0)
Link ID ADV Router Age Seq# Checksum Link count
172.16.21.6 172.16.21.6 1731 0x80002CFB 0x69BC 8
172.16.21.5 172.16.21.5 1112 0x800009D2 0xA2B8 5
172.16.1.2 172.16.1.2 1662 0x80000A98 0x4CB6 9
172.16.1.1 172.16.1.1 1115 0x800009B6 0x5F2C 1
172.16.1.5 172.16.1.5 1691 0x80002BC 0x2A1A 5
172.16.65.6 172.16.65.6 1395 0x80001947 0xEEE1 4
172.16.241.5 172.16.241.5 1161 0x8000007C 0x7C70 1
172.16.27.6 172.16.27.6 1723 0x80000548 0x8641 4
172.16.70.6 172.16.70.6 1485 0x80000B97 0xEB84 6
Displaying Net Link States(Area 0.0.0.0)
Link ID ADV Router Age Seq# Checksum
172.16.1.3 192.168.239.66 1245 0x800000EC 0x82E
Displaying Summary Net Link States(Area 0.0.0.0)
Link ID ADV Router Age Seq# Checksum
172.16.240.0 172.16.241.5 1152 0x80000077 0x7A05
172.16.241.0 172.16.241.5 1152 0x80000070 0xAEB7
172.16.244.0 172.16.241.5 1152 0x80000071 0x95CB
The table below describes the significant fields shown in the display.
Table 6 show ip ospf Database Field Descriptions
Field
Description
Link ID
Router ID number.
ADV Router
Advertising router’s ID.
Age
Link state age.
Seq#
Link state sequence number (detects old or duplicate link state advertisements).
Checksum
Fletcher checksum of the complete contents of the link state advertisement.
Link count
Number of interfaces detected for router.
The following is sample output from the
showipospfdatabasecommand with the
asbr-summarykeyword:
Router# show ip ospf database asbr-summary
OSPF Router with id(192.168.239.66) (Process ID 300)
Displaying Summary ASB Link States(Area 0.0.0.0)
LS age: 1463
Options: (No TOS-capability)
LS Type: Summary Links(AS Boundary Router)
Link State ID: 172.16.245.1 (AS Boundary Router address)
Advertising Router: 172.16.241.5
LS Seq Number: 80000072
Checksum: 0x3548
Length: 28
Network Mask: 0.0.0.0 TOS: 0 Metric: 1
The table below describes the significant fields shown in the display.
Table 7 show ip ospf database asbr-summary Field Descriptions
Field
Description
OSPF Router with id
Router ID number.
Process ID
OSPF process ID.
LS age
Link state age.
Options
Type of service options (Type 0 only).
LS Type
Link state type.
Link State ID
Link state ID (autonomous system boundary router).
Advertising Router
Advertising router’s ID.
LS Seq Number
Link state sequence (detects old or duplicate link state advertisements).
Checksum
LS checksum (Fletcher checksum of the complete contents of the link state advertisement).
Length
Length in bytes of the link state advertisement.
Network Mask
Network mask implemented.
TOS
Type of service.
Metric
Link state metric.
The following is sample output from the
showipospfdatabasecommand with the
externalkeyword:
Router# show ip ospf database external
OSPF Router with id(192.168.239.66) (Autonomous system 300)
Displaying AS External Link States
LS age: 280
Options: (No TOS-capability)
LS Type: AS External Link
Link State ID: 10.105.0.0 (External Network Number)
Advertising Router: 172.16.70.6
LS Seq Number: 80000AFD
Checksum: 0xC3A
Length: 36
Network Mask: 255.255.0.0
Metric Type: 2 (Larger than any link state path)
TOS: 0
Metric: 1
Forward Address: 0.0.0.0
External Route Tag: 0
The table below describes the significant fields shown in the display.
Table 8 show ip ospf database external Field Descriptions
Field
Description
OSPF Router with id
Router ID number.
Autonomous system
OSPF autonomous system number (OSPF process ID).
LS age
Link state age.
Options
Type of service options (Type 0 only).
LS Type
Link state type.
Link State ID
Link state ID (external network number).
Advertising Router
Advertising router’s ID.
LS Seq Number
Link state sequence number (detects old or duplicate link state advertisements).
Checksum
LS checksum (Fletcher checksum of the complete contents of the LSA).
Length
Length in bytes of the link state advertisement.
Network Mask
Network mask implemented.
Metric Type
External Type.
TOS
Type of service.
Metric
Link state metric.
Forward Address
Forwarding address. Data traffic for the advertised destination will be forwarded to this address. If the forwarding address is set to 0.0.0.0, data traffic will be forwarded instead to the advertisement’s originator.
External Route Tag
External route tag, a 32-bit field attached to each external route. This is not used by the OSPF protocol itself.
The following is sample output from the
showipospfdatabasecommand with the
networkkeyword:
Router# show ip ospf database network
OSPF Router with id(192.168.239.66) (Process ID 300)
Displaying Net Link States(Area 0.0.0.0)
LS age: 1367
Options: (No TOS-capability)
LS Type: Network Links
Link State ID: 172.16.1.3 (address of Designated Router)
Advertising Router: 192.168.239.66
LS Seq Number: 800000E7
Checksum: 0x1229
Length: 52
Network Mask: 255.255.255.0
Attached Router: 192.168.239.66
Attached Router: 172.16.241.5
Attached Router: 172.16.1.1
Attached Router: 172.16.54.5
Attached Router: 172.16.1.5
The table below describes the significant fields shown in the display.
Table 9 show ip ospf database network Field Descriptions
Field
Description
OSPF Router with id
Router ID number.
Process ID 300
OSPF process ID.
LS age
Link state age.
Options
Type of service options (Type 0 only).
LS Type:
Link state type.
Link State ID
Link state ID of designated router.
Advertising Router
Advertising router’s ID.
LS Seq Number
Link state sequence (detects old or duplicate link state advertisements).
Checksum
LS checksum (Fletcher checksum of the complete contents of the link state advertisement).
Length
Length in bytes of the link state advertisement.
Network Mask
Network mask implemented.
AS Boundary Router
Definition of router type.
Attached Router
List of routers attached to the network, by IP address.
The following is sample output from the
showipospfdatabasecommand with the
routerkeyword:
Router# show ip ospf database router
OSPF Router with id(192.168.239.66) (Process ID 300)
Displaying Router Link States(Area 0.0.0.0)
LS age: 1176
Options: (No TOS-capability)
LS Type: Router Links
Link State ID: 172.16.21.6
Advertising Router: 172.16.21.6
LS Seq Number: 80002CF6
Checksum: 0x73B7
Length: 120
AS Boundary Router
155 Number of Links: 8
Link connected to: another Router (point-to-point)
(link ID) Neighboring Router ID: 172.16.21.5
(Link Data) Router Interface address: 172.16.21.6
Number of TOS metrics: 0
TOS 0 Metrics: 2
The table below describes the significant fields shown in the display.
Table 10 show ip ospf database router Field Descriptions
Field
Description
OSPF Router with id
Router ID number.
Process ID
OSPF process ID.
LS age
Link state age.
Options
Type of service options (Type 0 only).
LS Type
Link state type.
Link State ID
Link state ID.
Advertising Router
Advertising router’s ID.
LS Seq Number
Link state sequence (detects old or duplicate link state advertisements).
Checksum
LS checksum (Fletcher checksum of the complete contents of the link state advertisement).
Length
Length in bytes of the link state advertisement.
AS Boundary Router
Definition of router type.
Number of Links
Number of active links.
link ID
Link type.
Link Data
Router interface address.
TOS
Type of service metric (Type 0 only).
The following is sample output from
showipospfdatabasecommand with the
summarykeyword:
Router# show ip ospf database summary
OSPF Router with id(192.168.239.66) (Process ID 300)
Displaying Summary Net Link States(Area 0.0.0.0)
LS age: 1401
Options: (No TOS-capability)
LS Type: Summary Links(Network)
Link State ID: 172.16.240.0 (summary Network Number)
Advertising Router: 172.16.241.5
LS Seq Number: 80000072
Checksum: 0x84FF
Length: 28
Network Mask: 255.255.255.0 TOS: 0 Metric: 1
The table below describes the significant fields shown in the display.
Table 11 show ip ospf database summary Field Descriptions
Field
Description
OSPF Router with id
Router ID number.
Process ID
OSPF process ID.
LS age
Link state age.
Options
Type of service options (Type 0 only).
LS Type
Link state type.
Link State ID
Link state ID (summary network number).
Advertising Router
Advertising router’s ID.
LS Seq Number
Link state sequence (detects old or duplicate link state advertisements).
Checksum
LS checksum (Fletcher checksum of the complete contents of the link state advertisement).
Length
Length in bytes of the link state advertisement.
Network Mask
Network mask implemented.
TOS
Type of service.
Metric
Link state metric.
The following is sample output from
showipospfdatabasecommand with the
database-summarykeyword:
Router# show ip ospf database database-summary
OSPF Router with ID (10.0.0.1) (Process ID 1)
Area 0 database summary
LSA Type Count Delete Maxage
Router 3 0 0
Network 0 0 0
Summary Net 0 0 0
Summary ASBR 0 0 0
Type-7 Ext 0 0 0
Self-originated Type-7 0
Opaque Link 0 0 0
Opaque Area 0 0 0
Subtotal 3 0 0
Process 1 database summary
LSA Type Count Delete Maxage
Router 3 0 0
Network 0 0 0
Summary Net 0 0 0
Summary ASBR 0 0 0
Type-7 Ext 0 0 0
Opaque Link 0 0 0
Opaque Area 0 0 0
Type-5 Ext 0 0 0
Self-originated Type-5 200
Opaque AS 0 0 0
Total 203 0 0
The table below describes the significant fields shown in the display.
Table 12 show ip ospf database database-summary Field Descriptions
Field
Description
Area 0 database summary
Area number.
Count
Count of LSAs of the type identified in the first column.
Router
Number of router link state advertisements in that area.
Network
Number of network link state advertisements in that area.
Summary Net
Number of summary link state advertisements in that area.
Summary ASBR
Number of summary autonomous system boundary router (ASBR) link state advertisements in that area.
Type-7 Ext
Type-7 LSA count.
Self-originated Type-7
Self-originated Type-7 LSA.
Opaque Link
Type-9 LSA count.
Opaque Area
Type-10 LSA count
Subtotal
Sum of LSAs for that area.
Delete
Number of link state advertisements that are marked “Deleted” in that area.
Maxage
Number of link state advertisements that are marked “Maxaged” in that area.
Process 1 database summary
Database summary for the process.
Count
Count of LSAs of the type identified in the first column.
Router
Number of router link state advertisements in that process.
Network
Number of network link state advertisements in that process.
Summary Net
Number of summary link state advertisements in that process.
Summary ASBR
Number of summary autonomous system boundary router (ASBR) link state advertisements in that process.
Type-7 Ext
Type-7 LSA count.
Opaque Link
Type-9 LSA count.
Opaque Area
Type-10 LSA count.
Type-5 Ext
Type-5 LSA count.
Self-Originated Type-5
Self-originated Type-5 LSA count.
Opaque AS
Type-11 LSA count.
Total
Sum of LSAs for that process.
Delete
Number of link state advertisements that are marked “Deleted” in that process.
Maxage
Number of link state advertisements that are marked “Maxaged” in that process.
show ip ospf events
To display the IP Open Shortest Path First (OSPF) events information, use the show ip ospf events command in user EXEC or privileged EXEC mode.
(Optional) Displays the generic event information.
interface
(Optional) Displays the interface state change event information.
lsa
(Optional) Displays the OSPF Link State Advertisements (LSA) arrival and LSA generation event information.
neighbor
(Optional) Displays the neighbor state change event information.
reverse
(Optional) Displays the events in reverse order.
rib
(Optional) Displays the Routing Information Base (RIB) update, delete, and redistribution event information.
spf
(Optional) Displays the Shortest Path First (SPF) scheduling and SPF run information.
Command Modes
User EXEC (>) Privileged EXEC (#)
Command History
Release
Modification
12.3(33)SRC
This command was introduced in a release earlier than Cisco IOS Release 12.3(33)SRC.
12.3(33)SRD
This command was integrated into a release earlier than Cisco IOS Release 12.3(33)SRD.
Cisco IOS XE 2.1
This command was integrated into Cisco IOS XE Release 2.1.
Examples
The following is sample output from the
showipospfeventscommand. The fields are self-explanatory.
Router# show ip ospf events
OSPF Router with ID (4.4.4.4) (Process ID 1)
1 Jan 22 01:51:03.090: DB free: 1.1.1.10x6CF250 103
2 Jan 22 01:51:03.090: delete MAXAGE lsa: 0x666CF2500x666CF250
3 Jan 22 01:50:56.086: DB free: 1.1.1.10x6025D4 103
4 Jan 22 01:50:56.086: DB free: 1.1.1.10x6D59A0 103
5 Jan 22 01:50:56.082: Insert MAXAGE lsa: 0x666D59A01.1.1.1
6 Jan 22 01:50:55.590: Timer Exp: if_ack_delayed0x64782774
7 Jan 22 01:50:55.590: Timer Exp: if_ack_delayed0x64786CB4
8 Jan 22 01:50:55.586: Timer Exp: if_ack_delayed0x647CD1A8
9 Jan 22 01:50:55.586: Timer Exp: if_ack_delayed0x647C8134
10 Jan 22 01:50:53.586: Insert MAXAGE lsa: 0x666025D41.1.1.1
11 Jan 22 01:50:53.586: Rcv Changed Type-3 LSA, LSID 1.1.1.1, Adv-Rtr 3.3.3.3, Seq# 80000002, Age 3600, Area 1
12 Jan 22 01:50:53.586: Insert MAXAGE lsa: 0x666D59A01.1.1.1
13 Jan 22 01:50:53.586: Generate Changed Type-3 LSA, LSID 1.1.1.1, Seq# 80000002, Age 3600, Area 0
14 Jan 22 01:50:53.290: End of SPF, Topo Base, SPF time 4ms, next wait-interval 200ms
15 Jan 22 01:50:53.290: Generic: ospf_external_route_sync0x1
16 Jan 22 01:50:53.290: Generic: ospf_external_route_sync0x0
17 Jan 22 01:50:53.290: Generic: ospf_external_route_sync0x0
18 Jan 22 01:50:53.290: Starting External processing, Topo Base in area 1
19 Jan 22 01:50:53.290: Starting External processing, Topo Base in area 0
20 Jan 22 01:50:53.286: Starting External processing, Topo Base
21 Jan 22 01:50:53.286: Generic: ospf_inter_route_sync0x0
22 Jan 22 01:50:53.286: Starting summary processing, Topo Base, Area 0
23 Jan 22 01:50:53.286: Generic: ospf_inter_route_sync0x1
24 Jan 22 01:50:53.286: Generic: post_spf_intra0x0
25 Jan 22 01:50:53.286: Generic: ospf_intra_route_sync0x1
26 Jan 22 01:50:53.286: Generic: update_rtr_route0x1
27 Jan 22 01:50:53.286: Generic: update_rtr_route0x1
28 Jan 22 01:50:53.286: Generic: update_rtr_route0x1
29 Jan 22 01:50:53.286: Starting Intra-Area SPF, Topo Base, Area 1, spf_type Full
30 Jan 22 01:50:53.286: Starting SPF, Topo Base, wait-interval 200ms
31 Jan 22 01:50:53.118: Rcv New Type-3 LSA, LSID 1.1.1.1, Adv-Rtr 3.3.3.3, Seq# 80000001, Age 1, Area 1
32 Jan 22 01:50:53.118: DB add: 1.1.1.10x6025D4 103
33 Jan 22 01:50:53.090: Insert MAXAGE lsa: 0x666CF2501.1.1.1
34 Jan 22 01:50:53.090: Rcv Changed Type-3 LSA, LSID 1.1.1.1, Adv-Rtr 3.3.3.3, Seq# 80000002, Age 3600, Area 0
35 Jan 22 01:50:53.086: Rcv Changed Type-1 LSA, LSID 1.1.1.1, Adv-Rtr 1.1.1.1, Seq# 80000008, Age 2, Area 1
36 Jan 22 01:50:53.086: Schedule SPF, Topo Base, Area 1, spf-type Full, Change in LSA Type R, LSID 1.1.1.1, Adv-Rtr 1.1.1.1
37 Jan 22 01:50:46.310: Timer Exp: exfaddr0x0
38 Jan 22 01:50:16.310: Timer Exp: exfaddr0x0
show ip ospf fast-reroute
To display information for an Open Shortest Path First (OSPF) per-prefix loop-free alternate (LFA) fast reroute (FRR) configuration, use the
showipospffast-reroute command in privileged EXEC mode.
show ip ospf
[ process-id ]
fast-reroute
[ prefix-summary | remote-lfa tunnels ]
Syntax Description
process-id
(Optional) Internal identification. It is locally assigned and can be any positive integer. The number used here is the number assigned administratively when enabling the OSPF routing process.
prefix-summary
(Optional) Displays information about prefixes protected by LFA FRR repair paths.
remote-lfa tunnels
(Optional) Displays information about tunnel interfaces created by remote LFA FRR.
Command Modes
Privileged EXEC (#)
Command History
Release
Modification
15.1(3)S
This command was introduced.
Cisco IOS XE Release 3.4S
This command was integrated into Cisco IOS XE Release 3.4S.
15.2(2)S
This command was modified. The
remote-lfa tunnels keyword was added.
15.2(2)SNI
This command was implemented on the Cisco ASR 901 Series Aggregation Services Routers.
Usage Guidelines
Use the
showipospffast-reroute command to display information on the current tiebreaker policy. Use the
prefix-summary keyword to display the number of prefixes per area, per priority, and how many that, in absolute numbers and in percentages, have repair paths.
Use the
remote-lfa tunnels keyword to display information about tunnel interfaces created by remote LFA FRR using the
fast-reroute per-prefix remote-lfa tunnel command.
Examples
The following example displays summary information about LFA FRR status, including the current tiebreaker policy:
Router# show ip ospf fast-reroute
OSPF Router with ID (192.1.1.1) (Process ID 1)
Loop-free Fast Reroute protected prefixes:
Area Topology name Priority
1 Base Low
172.69.69.66 Base High
AS external Base Low
Repair path selection policy tiebreaks:
23 srlg
34 lowest-metric
67 primary-path (required)
256 load-sharing
Last SPF calculation started 00:00:11 ago and was running for 20 ms.
The table below describes the significant fields shown in the display.
Table 13 show ip ospf fast-reroute Field Descriptions
Field
Description
Priority
Priority assigned to the protected prefix.
Repair path selection policy tiebreaks
Tiebreaking policy attributes and their priority-index assignments.
The following example displays information about prefixes that are protected by the OSPFv2 loop-free alternate FRR feature. It displays information on the number of prefixes by area and by priority (high or low) and how many are protected, that is, have repair paths configured.
Router# show ip ospf fast-reroute prefix-summary
OSPF Router with ID (192.1.1.1) (Process ID 1)
Base Topology (MTID 0)
Area 0:
Interface Protected Primary paths Protected paths Percent protected
All High Low All High Low All High Low
Loopback0 Yes 0 0 0 0 0 0 0% 0% 0%
Ethernet0/3 Yes 1 1 0 0 0 0 0% 0% 0%
Ethernet0/2 Yes 3 2 1 2 1 1 66% 50% 100%
Ethernet0/1 Yes 2 1 1 2 1 1 100% 100% 100%
Ethernet0/0 Yes 4 2 2 4 2 2 100% 100% 100%
Area total: 10 6 4 8 4 4 80% 66% 100%
Process total: 10 6 4 8 4 4 80% 66% 100%
The following example displays information about tunnel interfaces created by remote LFA FRR:
Router# show ip ospf fast-reroute remote-lfa tunnels
OSPF Router with ID (192.168.1.1) (Process ID 1)
Area with ID (0)
Base Topology (MTID 0)
Interface MPLS-Remote-Lfa3
Tunnel type: MPLS-LDP
Tailend router ID: 192.168.3.3
Termination IP address: 192.168.3.3
Outgoing interface: Ethernet0/0
First hop gateway: 192.168.14.4
Tunnel metric: 20
Protects:
192.168.12.2 Ethernet0/1, total metric 30
Related Commands
Command
Description
debugipospffast-reroute
Displays debugging information for per-prefix LFA FRR paths.
fast-reroutekeep-all-paths
Keeps a list of all the candidate repair paths that were considered when a per-prefix LFA FRR path was computed.
fast-rerouteper-prefix (OSPF)
Configures a per-prefix LFA FRR path that redirects traffic to an alternative next hop other than the primary neighbor.
fast-reroute per-prefix remote-lfa maximum-cost
Configures the maximum distance to the tunnel endpoint.
fast-reroute per-prefix remote-lfa tunnel
Configures a per-prefix LFA FRR path that redirects traffic to a remote LFA.
fast-reroutetie-break (OSPF)
Configures the LFA FRR tiebreaking priority.
ipospffast-rerouteper-prefix
Configures an interface as either protecting or protected.
prefix-priority
Configures a set of prefixes to have high priority for protection in an OSPF local RIB.
showipospfneighbor
Displays OSPF neighbor information on a per-interface basis.
showipospfrib
Displays information for the OSPF local RIB or locally redistributed routes.
show ip ospf flood-list
To display a list of Open Shortest Path First (OSPF) link-state advertisements (LSAs) waiting to be flooded over an interface, use the
showipospfflood-listcommand in EXEC mode.
Interface type over which the LSAs will be flooded.
interface-number
Interface number over which the LSAs will be flooded.
Command Modes
EXEC
Command History
Release
Modification
12.0(1)T
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
Use this command to observe OSPF packet pacing.
Examples
The following is sample output of the
showipospfflood-list command:
Router# show ip ospf flood-list ethernet 1
Interface Ethernet1, Queue length 20
Link state flooding due in 12 msec
Type LS ID ADV RTR Seq NO Age Checksum
5 10.2.195.0 192.168.0.163 0x80000009 0 0xFB61
5 10.1.192.0 192.168.0.163 0x80000009 0 0x2938
5 10.2.194.0 192.168.0.163 0x80000009 0 0x757
5 10.1.193.0 192.168.0.163 0x80000009 0 0x1E42
5 10.2.193.0 192.168.0.163 0x80000009 0 0x124D
5 10.1.194.0 192.168.0.163 0x80000009 0 0x134C
The table below describes the significant fields shown in the display.
Table 14 show ip ospf flood-list Field Descriptions
Field
Description
Interface Ethernet1
Interface for which information is displayed.
Queue length
Number of LSAs waiting to be flooded.
Link state flooding due in
Length of time before next link-state transmission.
Type
Type of LSA.
LS ID
Link-state ID of the LSA.
ADV RTR
IP address of advertising router.
Seq NO
Sequence number of LSA.
Age
Age of LSA (in seconds).
Checksum
Checksum of LSA.
show ip ospf interface
To display interface information related to Open Shortest Path First (OSPF), use the
show ip ospf interface command in user EXEC or privileged EXEC mode.
(Optional) Process ID number. If this argument is included, only information for the specified routing process is included. The range is 1 to 65535.
type
(Optional) Interface type. If the
type argument is included, only information for the specified interface type is included.
number
(Optional) Interface number. If the
number argument is included, only information for the specified interface number is included.
brief
(Optional) Displays brief overview information for OSPF interfaces, states, addresses and masks, and areas on the device.
multicast
(Optional) Displays multicast information.
topologytopology-name
(Optional) Displays OSPF-related information about the named topology instance.
topology base
(Optional) Displays OSPF-related information about the base topology.
Command Modes
User EXEC (>)
Privileged EXEC (#)
Command History
Release
Modification
10.0
This command was introduced.
12.0(25)S
This command was modified. The
brief keyword was added.
12.2(15)T
This command was modified. The
brief keyword was added.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SRB
The
multicast,
topology,
base, and
topology-name keywords and argument were added.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
12.2(33)SRC
Support for the OSPF TTL Security Check feature was added.
15.0(1)M
This command was integrated into Cisco IOS Release 15.0(1)M.
15.1(3)S
This command was modified to display output when loop-free alternate (LFA) Fast Reroute (FRR) is enabled on an interface and whether it can be a protected or a protecting interface.
Examples
The following is sample output from the
show ip ospf interface command when Ethernet interface 0/0 is specified. It shows that LFA and FRR is enabled on the interface and that it can be both a protected and a protecting interface.
Device# show ip ospf interface ethernet 0/0
Ethernet0/0 is up, line protocol is up
Internet Address 192.168.254.202/24, Area 0
Process ID 1, Router ID 192.168.99.1, Network Type BROADCAST, Cost: 10
Topology-MTID Cost Disabled Shutdown Topology Name
0 10 no no Base
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 192.168.99.1, Interface address 192.168.254.202
Backup Designated router (ID) 192.168.254.10, Interface address 192.168.254.10
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:05
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Can be protected by per-prefix Loop-free FastReroute
Can be used for per-prefix Loop-free FastReroute repair paths
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 192.168.254.10 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
In Cisco IOS Release 12.2(33)SRB, the following sample output from the
show ip ospf interface brief topology VOICE command shows a summary of information, including a confirmation that the Multitopology Routing (MTR) VOICE topology is configured in the interface configuration:
Device# show ip ospf interface brief topology VOICE
VOICE Topology (MTID 10)
Interface PID Area IP Address/Mask Cost State Nbrs F/C
Lo0 1 0 10.0.0.2/32 1 LOOP 0/0
Se2/0 1 0 10.1.0.2/30 10 P2P 1/1
The following sample output from the
show ip ospf interface brief topology VOICE command displays details of the MTR VOICE topology for the interface. When the command is entered without the
brief keyword, more information is displayed.
Device# show ip ospf interface topology VOICE
VOICE Topology (MTID 10)
Loopback0 is up, line protocol is up
Internet Address 10.0.0.2/32, Area 0
Process ID 1, Router ID 10.0.0.2, Network Type LOOPBACK
Topology-MTID Cost Disabled Shutdown Topology Name
10 1 no no VOICE
Loopback interface is treated as a stub Host Serial2/0 is up, line protocol is up
Internet Address 10.1.0.2/30, Area 0
Process ID 1, Router ID 10.0.0.2, Network Type POINT_TO_POINT
Topology-MTID Cost Disabled Shutdown Topology Name
10 10 no no VOICE
Transmit Delay is 1 sec, State POINT_TO_POINT
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
oob-resync timeout 40
Hello due in 00:00:03
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.0.0.1
Suppress hello for 0 neighbor(s)
In Cisco IOS Release 12.2(33)SRC, the following sample output from the
show ip ospf interface command displays details about the configured Time-to-Live (TTL) limits:
Device# show ip ospf interface ethernet 0
.
.
.
Strict TTL checking enabled
! or a message similar to the following is displayed
Strict TTL checking enabled, up to 4 hops allowed
.
.
.
The table below describes the significant fields shown in the displays.
Table 15
show ip ospf interface Field Descriptions
Field
Description
Ethernet
Status of the physical link and operational status of the protocol.
Process ID
OSPF process ID.
Area
OSPF area.
Cost
Administrative cost assigned to the interface.
State
Operational state of the interface.
Nbrs F/C
OSPF neighbor count.
Internet Address
Interface IP address, subnet mask, and area address.
Topology-MTID
MTR topology Multitopology Identifier (MTID). A number assigned so that the protocol can identify the topology associated with information that it sends to its peers.
Transmit Delay
Transmit delay in seconds, interface state, and device priority.
Designated Router
Designated router ID and respective interface IP address.
Backup Designated router
Backup designated router ID and respective interface IP address.
Timer intervals configured
Configuration of timer intervals.
Hello
Number of seconds until the next hello packet is sent out this interface.
Strict TTL checking enabled
Only one hop is allowed.
Strict TTL checking enabled, up to 4 hops allowed
A set number of hops has been explicitly configured.
Neighbor Count
Count of network neighbors and list of adjacent neighbors.
show ip ospf max-metric
To display IP Open Shortest Path First (OSPF) max-metric origination information, use the showipospfmax-metric command in user EXEC or privileged EXEC mode.
(Optional) Specifies the unicast or the multicast topology.
topology-name
(Optional) The multicast topology name.
base
(Optional) Specifies the multicast or unicast base topology.
Command Modes
User EXEC (>)
Privileged EXEC (#)
Command History
Mainline Release
Modification
12.4(24)T
This command was introduced in a release earlier than Cisco IOS Release 12.4(24)T.
12.2(33)SXI
This command was integrated into a release earlier than Cisco IOS Release 12.2(33)SXI.
12.2(33)SRE
This command was integrated into a release earlier than Cisco IOS Release 12.4(24)T.
Cisco IOS XE 2.1
This command was integrated into Cisco IOS XE Release 2.1.
Examples
The following is sample output from the showipospfmax-metriccommand. The fields are self-explanatory.
Router# show ip ospfmax-metric
OSPF Router with ID (190.0.30.1) (Process ID 2)
Base Topology (MTID 0)Start time: 3d12h, Time elapsed: 00:01:07.964
Originating router-LSAs with maximum metric
Condition: always, State: active
Advertise external-LSAs with metric 16711680
show ip ospf multi–area
To display interface information about Open Shortest Path First (OSPF) multiarea adjacency, use the showipospfmulti-area command in user EXEC or privileged EXEC mode.
showipospfprocess-idmulti-area
Syntax Description
process-id
Identifies the OSPF process. The range is from 1 to 65535.
Command Default
No default behavior or values.
Command Modes
User EXEC (>)
Privileged EXEC (#)
Command History
Release
Modification
Cisco IOS Release XE 3.10S
This command was introduced.
Examples
The following example shows sample output from the show ip ospf multi-area command:
Device# show ip ospf 1 multi-area
OSPF_MA1 is up, line protocol is up
Primary Interface Ethernet0/0, Area 2
Interface ID 2
MTU is 1500 bytes
Neighbor Count is 1
The table below describes the significant fields in the output.
Table 16 show ip ospf multi-area Field Descriptions
Field
Description
OSPF_MA1
Status of the OSPF multiarea interface.
Ethernet
Status of the physical link and operational status of the protocol.
Area
OSPF area.
MTU
The largest size of packets that the OSPF interface can transmit without the need to fragment.
Neighbor Count
Count of network neighbors and if applicable, a list of adjacent neighbors.
Related Commands
Command
Description
ip ospf multi-area
Enables multiarea adjacency on the OSPF interface.
ip ospf multi-area cost
Specifies the cost of sending a packet on an OSPF multiarea interface.
show ip ospf interface
Displays the interface information related to OSPF.
show ip ospf neighbor
To display Open Shortest Path First (OSPF) neighbor information on a per-interface basis, use the
showipospfneighbor command in privileged EXEC mode.
(Optional) Type and number associated with a specific OSPF interface.
neighbor-id
(Optional) Neighbor hostname or IP address in A.B.C.D format.
detail
(Optional) Displays all neighbors given in detail (lists all neighbors).
fast-reroute
(Optional) Displays per-neighbor border router tables and SPF statistics.
summary
(Optional) Displays total number summary of all neighbors.
per-instance
(Optional) Displays total number of neighbors in each neighbor state. The output is printed for each configured OSPF instance separately.
Command Modes
Privileged EXEC (#)
Command History
Release
Modification
10.0
This command was introduced.
12.2(28)SB
This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
12.2(33)SRC
Support for the OSPF TTL Security Check feature was added.
15.0(1)M
This command was integrated into Cisco IOS Release 15.0(1)M.
15.1(3)S
This command was modified. The
fast-reroute was keyword were added.
15.1(1)SY
This command was modified. The
summary and per-instance keywords were added.
15.3(1)S
This command was modified.The
summary and per-instance keywords were added.
Cisco IOS XE Release 3.8S
This command was modified. The
summary and per-instance keywords were added.
.
Examples
The following sample output from the show ip ospf neighbor command shows a single line of summary information for each neighbor:
Device# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.199.199.137 1 FULL/DR 0:00:31 192.168.80.37 Ethernet0
172.16.48.1 1 FULL/DROTHER 0:00:33 172.16.48.1 Fddi0
172.16.48.200 1 FULL/DROTHER 0:00:33 172.16.48.200 Fddi0
10.199.199.137 5 FULL/DR 0:00:33 172.16.48.189 Fddi0
The following is sample output showing summary information about the neighbor that matches the neighbor ID:
Device# show ip ospf neighbor 10.199.199.137
Neighbor 10.199.199.137, interface address 192.168.80.37
In the area 0.0.0.0 via interface Ethernet0
Neighbor priority is 1, State is FULL
Options 2
Dead timer due in 0:00:32
Link State retransmission due in 0:00:04
Neighbor 10.199.199.137, interface address 172.16.48.189
In the area 0.0.0.0 via interface Fddi0
Neighbor priority is 5, State is FULL
Options 2
Dead timer due in 0:00:32
Link State retransmission due in 0:00:03
If you specify the interface along with the neighbor ID, the system displays the neighbors that match the neighbor ID on the interface, as in the following sample display:
Device# show ip ospf neighbor ethernet 0 10.199.199.137
Neighbor 10.199.199.137, interface address 192.168.80.37
In the area 0.0.0.0 via interface Ethernet0
Neighbor priority is 1, State is FULL
Options 2
Dead timer due in 0:00:37
Link State retransmission due in 0:00:04
You can also specify the interface without the neighbor ID to show all neighbors on the specified interface, as in the following sample display:
Device# show ip ospf neighbor fddi 0
ID Pri State Dead Time Address Interface
172.16.48.1 1 FULL/DROTHER 0:00:33 172.16.48.1 Fddi0
172.16.48.200 1 FULL/DROTHER 0:00:32 172.16.48.200 Fddi0
10.199.199.137 5 FULL/DR 0:00:32 172.16.48.189 Fddi0
The following is sample output from the showipospfneighbordetail command:
Device# show ip ospf neighbor detail
Neighbor 192.168.5.2, interface address 10.225.200.28
In the area 0 via interface GigabitEthernet1/0/0
Neighbor priority is 1, State is FULL, 6 state changes
DR is 10.225.200.28 BDR is 10.225.200.30
Options is 0x42
LLS Options is 0x1 (LR), last OOB-Resync 00:03:08 ago
Dead timer due in 00:00:36
Neighbor is up for 00:09:46
Index 1/1, retransmission queue length 0, number of retransmission 1
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 1, maximum is 1
Last retransmission scan time is 0 msec, maximum is 0 msec
The table below describes the significant fields shown in the displays.
Area and interface through which the OSPF neighbor is known.
Neighbor priority
Router priority of the neighbor and neighbor state.
State
OSPF state. If one OSPF neighbor has enabled TTL security, the other side of the connection will show the neighbor in the INIT state.
state changes
Number of state changes since the neighbor was created. This value can be reset using the
clearipospfcountersneighbor command.
DR is
Router ID of the designated router for the interface.
BDR is
Router ID of the backup designated router for the interface.
Options
Hello packet options field contents. (E-bit only. Possible values are 0 and 2; 2 indicates area is not a stub; 0 indicates area is a stub.)
LLS Options..., last OOB-Resync
Link-Local Signaling and out-of-band (OOB) link-state database resynchronization performed hours:minutes:seconds ago. This is nonstop forwarding (NSF) information. The field indicates the last successful out-of-band resynchronization with the NSF-capable router.
Dead timer due in
Expected time in hours:minutes:seconds before Cisco IOS software will declare the neighbor dead.
Neighbor is up for
Number of hours:minutes:seconds since the neighbor went into the two-way state.
Index
Neighbor location in the area-wide and autonomous system-wide retransmission queue.
retransmission queue length
Number of elements in the retransmission queue.
number of retransmission
Number of times update packets have been re-sent during flooding.
First
Memory location of the flooding details.
Next
Memory location of the flooding details.
Last retransmission scan length
Number of link state advertisements (LSAs) in the last retransmission packet.
maximum
Maximum number of LSAs sent in any retransmission packet.
Last retransmission scan time
Time taken to build the last retransmission packet.
maximum
Maximum time, in milliseconds, taken to build any retransmission packet.
Examples
The following is sample output from the showipospfneighbor command showing a single line of summary information for each neighbor. If one OSPF neighbor has enabled TTL security, the other side of the connection will show the neighbor in the INIT state.
Device# show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
10.199.199.137 1 FULL/DR 0:00:31 192.168.80.37 Ethernet0
172.16.48.1 1 FULL/DROTHER 0:00:33 172.16.48.1 Fddi0
172.16.48.200 1 FULL/DROTHER 0:00:33 172.16.48.200 Fddi0
10.199.199.137 5 FULL/DR 0:00:33 172.16.48.189 Fddi0
172.16.1.201 1 INIT/DROTHER 00.00.35 10.1.1.201 Ethernet0/0
The following sample output from the
showipospfneighbor command shows the network from the neighbor’s point of view:
Device# show ip ospf neighbor 192.0.2.1 fast-reroute
OSPF Router with ID (192.1.1.1) (Process ID 1)
Area with ID (0)
Neighbor with Router ID 192.0.2.1:
Reachable over:
Ethernet0/0, IP address 192.0.2.1, cost 10
SPF was executed 1 times, distance to computing router 10
Router distance table:
192.1.1.1 i [10]
192.0.2.1 i [0]
192.3.3.3 i [10]
192.4.4.4 i [20]
192.5.5.5 i [20]
Network LSA distance table:
192.2.12.2 i [10]
192.2.13.3 i [20]
192.2.14.4 i [20]
192.2.15.5 i [20]
The following is sample output from the showipospfneighborsummary command:
Device# show ip ospf neighbor summary
Neighbor summary for all OSPF processes
DOWN 0
ATTEMPT 0
INIT 0
2WAY 0
EXSTART 0
EXCHANGE 0
LOADING 0
FULL 1
Total count 1 (Undergoing NSF 0)
The following is sample output from the showipospfneighborsummaryper-instance command:
Device# show ip ospf neighbor summary
OSPF Router with ID (1.0.0.10) (Process ID 1)
DOWN 0
ATTEMPT 0
INIT 0
2WAY 0
EXSTART 0
EXCHANGE 0
LOADING 0
FULL 1
Total count 1 (Undergoing NSF 0)
Neighbor summary for all OSPF processes
DOWN 0
ATTEMPT 0
INIT 0
2WAY 0
EXSTART 0
EXCHANGE 0
LOADING 0
FULL 1
Total count 1 (Undergoing NSF 0)
Table 18
showipospfneighborsummary and showipospfneighborsummaryper-instanceField Descriptions
Field
Description
DOWN
No information (hellos) has been received from this neighbor, but hello packets can still be sent to the neighbor in this state.
ATTEMPT
This state is only valid for manually configured neighbors in a Non-Broadcast Multi-Access (NBMA) environment. In Attempt state, the router sends unicast hello packets every poll interval to the neighbor, from which hellos have not been received within the dead interval.
INIT
This state specifies that the router has received a hello packet from its neighbor, but the receiving router's ID was not included in the hello packet. When a router receives a hello packet from a neighbor, it should list the sender's router ID in its hello packet as an acknowledgment that it received a valid hello packet.
2WAY
This state designates that bi-directional communication has been established between two routers.
EXSTART
This state is the first step in creating an adjacency between the two neighboring routers. The goal of this step is to decide which router is the master, and to decide upon the initial DD sequence number. Neighbor conversations in this state or greater are called adjacencies.
EXCHANGE
In this state, OSPF routers exchange database descriptor (DBD) packets. Database descriptors contain link-state advertisement (LSA) headers only and describe the contents of the entire link-state database. Each DBD packet has a sequence number which can be incremented only by master which is explicitly acknowledged by slave. Routers also send link-state request packets and link-state update packets (which contain the entire LSA) in this state. The contents of the DBD received are compared to the information contained in the routers link-state database to check if new or more current link-state information is available with the neighbor.
LOADING
In this state, the actual exchange of link state information occurs. Based on the information provided by the DBDs, routers send link-state request packets. The neighbor then provides the requested link-state information in link-state update packets. During the adjacency, if a device receives an outdated or missing LSA, it requests that LSA by sending a link-state request packet. All link-state update packets are acknowledged.
FULL
In this state, devices are fully adjacent with each other. All the device and network LSAs are exchanged and the devices' databases are fully synchronized.
Full is the normal state for an OSPF device. If a device is stuck in another state, it's an indication that there are problems in forming adjacencies. The only exception to this is the 2-way state, which is normal in a broadcast network. Devices achieve the full state with their DR and BDR only. Neighbors always see each other as 2-way.
show ip ospf nsf
To display IP Open Shortest Path First (OSPF) nonstop forwarding (NSF) state information, use the showipospfnsf command in user EXEC or privileged EXEC mode.
showipospfnsf
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC (>)
Privileged EXEC (#)
Command History
Mainline Release
Modification
12.2(33)SXI
This command was introduced in a release earlier than Cisco IOS Release 12.2(33)SXI.
12.2(33)SRE
This command was integrated into Cisco IOS Release 12.2(33)SRE.
Examples
The following is sample output from the showipospfnsfcommand. The fields are self-explanatory.
Router# show ip ospfnsf
Routing Process "ospf 2"
Non-Stop Forwarding enabled
IETF NSF helper support enabled
Cisco NSF helper support enabled
OSPF restart state is NO_RESTART
Handle 1786466308, Router ID 192.0.2.1, checkpoint Router ID 0.0.0.0
Config wait timer interval 10, timer not running
Dbase wait timer interval 120, timer not running
show ip ospf nsr
To display IP Open Shortest Path First (OSPF) nonstop routing (NSR) status information, use the showipospfnsr command in privileged EXEC mode.
(Optional) Process ID. If this argument is used, only information for the specified OSPF routing process is included.
objects
(Optional) Displays information on the OSPF NSR objects in the different OSPF routing processes.
statistics
(Optional) Displays OSPF NSR statistical information for the different OSPF routing processes.
Command Modes
Privileged EXEC (#)
Command History
Release
Modification
15.1(2)S
This command was introduced.
Cisco IOS XE Release 3.3S
This command was integrated into Cisco IOS XE Release 3.3S.
15.2(1) E
This command was integrated into 15.2(1) E.
Examples
The following sample output from the showipospfnsrcommand shows that OSPF on the standby RP is fully synchronized and ready to continue operation if the active RP fails or if a manual switchover is performed. NSR is configured and enabled for the “ospf 1” OSPF routing process. The fields are self-explanatory.
Router# show ip ospf
1 nsr
Active RP
Operating in duplex mode
Redundancy state: ACTIVE
Peer redundancy state: STANDBY HOT
Checkpoint peer ready
Checkpoint messages enabled
ISSU negotiation complete
ISSU versions compatible
Routing Process "ospf 1" with ID 10.1.1.100
NSR configured
Checkpoint message sequence number: 6360
Standby synchronization state: synchronized
Bulk sync operations: 1
Next sync check time: 18:48:27.097 PST Fri Dec 10 2010
LSA Count: 3301, Checksum Sum 0x06750217
Related Commands
Command
Description
nsr
Enables NSR on a router that is running OSPF.
show ip ospf request-list
To display a list of all link-state advertisements (LSAs) requested by a router, use the
showipospfrequest-listcommand in EXEC mode.
(Optional) Displays the list of all LSAs requested by the router from this neighbor.
interface
(Optional) Displays the list of all LSAs requested by the router from this interface.
interface-neighbor
(Optional) Displays the list of all LSAs requested by the router on this interface from this neighbor.
Command Modes
EXEC
Command History
Release
Modification
10.2
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
The information displayed by the
showipospfrequest-listcommand is useful in debugging Open Shortest Path First (OSPF) routing operations.
Examples
The following is sample output from the
showipospfrequest-list command:
Router# show ip ospf request-list serial 0
OSPF Router with ID (192.168.1.11) (Process ID 1)
Neighbor 192.168.1.12, interface Serial0 address 172.16.1.12
Type LS ID ADV RTR Seq NO Age Checksum
1 192.168.1.12 192.168.1.12 0x8000020D 8 0x6572
The table below describes the significant fields shown in the displays.
Table 19
showipospfrequest-listField Descriptions
Field
Description
Type
LSA-type.
LS ID
IP address of the neighbor router.
ADV RTR
IP address of the advertising router.
Seq NO
Packet sequence number of the LSA.
Age
Age, in seconds, of the LSA.
Checksum
Checksum number of the LSA.
show ip ospf retransmission-list
To display a list of all link-state advertisements (LSAs) waiting to be re-sent, use the
showipospfretransmission-listcommand in EXEC mode.
(Optional) Displays the list of all LSAs waiting to be re-sent for this neighbor.
interface
(Optional) Displays the list of all LSAs waiting to be re-sent on this interface.
interfaceneighbor
(Optional) Displays the list of all LSAs waiting to be re-sent on this interface, from this neighbor.
Command Modes
EXEC
Command History
Release
Modification
10.2
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
The information displayed by the
showipospfretransmission-listcommand is useful in debugging Open Shortest Path First (OSPF) routing operations.
Examples
The following is sample output from the
showipospfretransmission-list command:
Router# show ip ospf retransmission-list serial 0
OSPF Router with ID (192.168.1.12) (Process ID 1)
Neighbor 192.168.1.11, interface Serial0 address 172.16.1.11
Link state retransmission due in 3764 msec, Queue length 2
Type LS ID ADV RTR Seq NO Age Checksum
1 192.168.1.12 192.168.1.12 0x80000210 0 0xB196
The table below describes the significant fields shown in the displays.
To display information for the Open Shortest Path First (OSPF) local Routing Information Base (RIB) or locally redistributed routes, use the
showipospfribcommand in privileged EXEC mode.
Internally used identification parameter for an OSPF routing process. It is locally assigned and can be any positive integer. A unique value is assigned for each OSPF routing process.
redistribution
(Optional) Displays IP OSPF redistribution RIB information.
network-prefix
(Optional) Network prefix. Displays paths for a specific route.
network-mask
(Optional) IP address mask. Displays paths for all routes under a major network.
detail
(Optional) Displays more detailed information about the OSPF local RIB.
Command Modes
Privileged EXEC (#)
Command History
Release
Modification
12.4(15)T
This command was introduced.
12.2(33)SRC
This command was integrated into Cisco IOS Release 12.2(33)SRC.
12.2(33)SB
This command was integrated into Cisco IOS Release 12.2(33)SB.
15.1(3)S
This command was modified. Output was enhanced to display both primary paths and any loop-free alternate (LFA) and Fast Reroute (FRR) repair paths protecting them.
15.2(2)SNI
This command was implemented on the Cisco ASR 901 Series Aggregation Services Routers.
Usage Guidelines
If the
network-prefix and
network-mask arguments are both entered, only the route that matches the network prefix and IP address mask is displayed. If only the
network-prefix argument is entered, a longest prefix lookup is performed and the matching route is displayed.
Examples
The following example displays information about locally redistributed routes:
Router# show ip ospf 1 rib redistribution 192.168.240.0
OSPF Redistribution for Process 1
192.168.240/20, metric 0, tag 0, from OSPF Router 130
Attributes 0x1000220, event 1
via Ethernet0/0
OSPF Redistribution Process 130
The table below describes the significant fields shown in the display.
Routing redistribution information for OSPF process 1.
192.168.240/20
Network number and mask.
metric 0
OSPF metric type.
tag 0
OSPF process tag identifier.
from OSPF Router
OSPF router from which routing information was redistributed.
Attributes 0x1000220
OSPF attribute.
event
OSPF redistribution event 1.
Via Ethernet0/0
The interface through which routing information has been redistributed.
OSPF Redistribution Process
Routing redistribution information for OSPF process 13.
The following example displays information about primary paths and the LFA and FRR repair paths protecting them:
Router# show ip ospf 1 rib
OSPF Router with ID (192.1.1.1) (Process ID 1)
Base Topology (MTID 0)
OSPF local RIB
Codes: * - Best, > - Installed in global RIB
* 192.168.15.0/24, Intra, cost 10, area 0, Connected
via 192.168.15.1, Ethernet0/3
*> 192.168.23.0/24, Intra, cost 20, area 0
via 192.168.12.2, Ethernet0/0
repair path via 192.168.13.3, Ethernet0/1, cost 20
via 192.168.13.3, Ethernet0/1
repair path via 192.168.12.2, Ethernet0/0, cost 20
*> 192.168.26.0/24, Intra, cost 20, area 0
via 192.168.12.2, Ethernet0/0
repair path via 192.168.13.3, Ethernet0/1, cost 30
*> 192.168.46.0/24, Intra, cost 30, area 0
via 192.168.12.2, Ethernet0/0
repair path via 192.168.13.3, Ethernet0/1, cost 40
Related Commands
Command
Description
debugipospfrib
Displays debugging information for OSPF Version 2 routes in the global or local RIB.
showipospffast-reroute
Displays information about prefixes protected by LFA FRR repair paths.
showipospfinterface
Displays OSPF interface information.
showipospfneighbor
Displays OSPF neighbor information on a per-interface basis.
show ip ospf sham-links
To display information about all sham-links configured for a provider
edge (PE) router in the Virtual Private Network (VPN) backbone, use the
showipospfsham-links command in EXEC mode.
showipospfsham-links
Syntax Description
This command has no arguments or keywords.
Command Default
No default behavior or values.
Command Modes
EXEC
Command History
Release
Modification
12.2(8)T
This command was introduced.
12.0(21)ST
This command was integrated into Cisco IOS Release
12.0(21)ST, and support for Cisco 12000 series Internet Router was added.
12.0(22)S
This command was integrated into Cisco IOS Release
12.0(22)S, and support for Cisco 10000 series Internet Routers was added.
12.2(33)SRA
This command was integrated into Cisco IOS Release
12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX
train. Support in a specific 12.2SX release of this train depends on your
feature set, platform, and platform hardware.
Usage Guidelines
Use this command to display Open Shortest Path First (OSPF)
information about the sham-links configured on a PE router.
Examples
The following example shows sample output from the
showipospfsham-links command for a PE router in the VPN
backbone:
Router1# show ip ospf sham-links
Sham Link OSPF_SL0 to address 10.44.0.1 is up
Area 120 source address 10.0.0.1
Run as demand circuit
DoNotAge LSA allowed., Cost of using 1
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:09
Adjacency State FULL (Hello suppressed)
Index 2/2, retransmission queue length 0, number of retransmission 27
First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 2
Last retransmission scan time is 0 msec, maximum is 0 msec
show ip ospf statistics
To display Open Shortest Path First (OSPF) shortest path first (SPF) calculation statistics, use the
showipospfstatisticscommand in user EXEC or privileged EXEC mode.
showipospfstatistics [detail]
Syntax Description
detail
(Optional) Displays statistics separately for each OSPF area and includes additional, more detailed statistics.
Command Modes
User EXEC Privileged EXEC
Command History
Release
Modification
12.0(24)S
This command was introduced.
12.2(18)S
The command was integrated into Cisco IOS Release 12.2(18)S.
12.3(2)T
The command was integrated into Cisco IOS Release 12.3(2)T.
Usage Guidelines
The
showipospfstatistics command provides important information about SPF calculations and the events that trigger them. This information can be meaningful for both OSPF network maintenance and troubleshooting. For example, entering the
showipospfstatistics command is recommended as the first troubleshooting step for link-state advertisement (LSA) flapping.
Examples
The following is sample output from the
showipospfstatisticscommand that shows a single line of information for each SPF calculation:
Router# show ip ospf statistics
OSPF process ID 200
------------------------------------------
Area 0: SPF algorithm executed 10 times
Area 200: SPF algorithm executed 8 times
Summary OSPF SPF statistic
SPF calculation time
Delta T Intra D-Intra Summ D-Summ Ext D-Ext Total Reason
08:17:16 0 0 0 0 0 0 0 R,
08:16:47 0 0 0 0 0 0 0 R, N,
08:16:37 0 0 0 0 0 0 0 R, X
00:04:40 208 40 208 44 220 0 720 R, N, SN, X
00:03:15 0 112 4 108 8 96 328 R, N, SN, X
00:02:55 164 40 176 44 188 0 612 R, N, SN, X
00:01:49 0 4 4 0 4 4 16 R, N, SN, X
00:01:48 0 0 4 0 4 0 12 R, N, SN, SA, X
00:01:43 0 0 4 0 4 0 8 R,
00:00:53 164 40 176 44 188 0 612 R, N, SN, X
The table below describes the significant fields shown in the display.
Table 22
showipospfstatisticsField Descriptions
Field
Description
OSPF process ID
A unique value assigned to the OSPF process in the configuration.
Area
OSPF area ID.
SPF algorithm executed
Number of times SPF algorithm has been executed for the particular area.
Delta T
Amount of time in milliseconds that has passed from when SPF started its calculation to the current time.
Intra
Time in milliseconds for the SPF algorithm to process intra-area LSAs and install intra-area routes in the routing table.
D-Intra
Time in milliseconds for the SPF algorithm to delete invalid intra-area routes from the routing table.
Summ
Time in milliseconds for the SPF algorithm to process interarea LSAs and install interarea routes in the routing table.
D-Summ
Time in milliseconds for the SPF algorithm to delete invalid interarea routes from the routing table.
Ext
Time in milliseconds for the SPF algorithm to process external and not so stubby area (NSSA) LSAs and install external and NSSA routes in the routing table.
D-Ext
Time in milliseconds for the SPF algorithm to delete invalid external and NSSA routes from the routing table.
Total
Total duration time, in milliseconds, for the SPF algorithm process.
Reason
Record of reasons causing SPF to be executed:
N--A change in a network LSA (type 2) has occurred.
R--A change in a router LSA (type 1) has occurred.
SA--A change in a Summary autonomous system boundary router (ASBR) (SA) LSA has occurred.
SN--A change in a Summary Network (SN) LSA has occurred.
X--A change in an External Type-7 (X7) LSA has occurred.
The following is sample output from the
showipospfstatisticscommand with the
detail keyword entered to show the statistics separately for a specific area:
Router# show ip ospf statistics detail
SPF 7 executed 2d17h ago, SPF type Full
SPF calculation time (in msec):
SPT Intra D-Intr Summ D-Summ Ext7 D-Ext7 Total
0 0 0 0 0 0 0 0
LSIDs processed R:4 N:1 Stub:5 SN:17 SA:1 X7:0
Change record R,
LSIDs changed 1
Last 10 LSIDs:
2.0.0.202(R)
The table below describes the significant fields shown in the display.
Number of SPF algorithms executed in the OSPF area. The number increases by one for each SPF algorithm that is executed in the area.
Executed ago
Time in milliseconds that has passed between the start of the SPF algorithm execution and the current time.
SPF type
SPF type can be Full or Incremental.
SPT
Time in milliseconds requires to compute the first stage of the SPF algorithm (to build a short path tree). The SPT time plus the time required to process links to stub networks equals the Intra time.
Ext
Time in milliseconds for the SPF algorithm to process external and not so stubby area (NSSA) link-state advertisements (LSAs) and install external and NSSA routes in the routing table.
Total
Total duration time, in milliseconds, for the SPF algorithm process.
Note
Total time is the sum of previous times excluding the SPT time, which is already included in the Intra time.
LSIDs processed
Number of LSAs processed during the SPF calculation:
N--Network LSA.
R--Router LSA.
SA--Summary autonomous system boundary router (ASBR) (SA) LSA.
SN--Summary Network (SN) LSA.
Stub--Stub links.
X7--External Type-7 (X7) LSA.
LSIDs changed
Number of LSAs changed between this SPF calculation and the previous one. LSA changes force SPF to be scheduled.
Last 10 LSIDs
List of last ten Intra area LSAs that have changed between this SPF calculation and the previous one. LSID types:
R--Router LSA (type 1)
N--Network LSA (type 2)
show ip ospf summary-address
To display a list of all summary address redistribution information configured under an Open Shortest Path First (OSPF) process, use the
showipospfsummary-addresscommand in EXEC mode.
showipospf [process-id] summary-address
Syntax Description
process-id
(Optional) OSPF area ID.
Command Modes
EXEC
Command History
Release
Modification
10.0
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
The
process-id argument can be entered as a decimal number or as an IP address format.
Examples
The following is sample output from the
showipospfsummary-address command:
Router# show ip ospf summary-address
OSPF Process 2, Summary-address
10.2.0.0/255.255.0.0 Metric -1, Type 0, Tag 0
10.2.0.0/255.255.0.0 Metric -1, Type 0, Tag 10
The table below describes the significant fields shown in the displays.
Table 24
showipospfrequest-listField Descriptions
Field
Description
10.2.0.0/255.255.0.0
IP address and mask of the router for the OSPF process.
Metric -1
OSPF metric type.
Type 0
Type of LSA.
Tag 0
OSPF process tag identifier.
show ip ospf timers rate-limit
To display all of the link-state advertisements (LSAs) in the rate limit queue, use the
showipospftimersrate-limitcommand in privileged EXEC mode.
showipospftimersrate-limit
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Release
Modification
12.0(25)S
This command was introduced.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
Use this command if you need to see when LSAs in the queue will be sent.
Examples
The following is sample output from the
showipospftimersrate-limit command:
Router# show ip ospf timers rate-limit
LSAID: 10.1.1.1 Type: 1 Adv Rtr: 172.16.2.2 Due in: 00:00:00.028
LSAID: 172.16.4.1 Type: 3 Adv Rtr: 172.16.2.2 Due in: 00:00:00.028
The table below describes the significant fields shown in the display.
Table 25 show ip ospf timers rate-limit Field Descriptions
Field
Description
LSAID
ID of the LSA.
Type
Type of LSA.
Adv Rtr
ID of advertising router.
Due in
When the LSA is scheduled to be sent (in hours:minutes:seconds).
show ip ospf traffic
To display Open Shortest Path First (OSPF) traffic statistics, use the
showipospftraffic command in user EXEC or privileged EXEC mode.
(Optional) Process ID. If the
process-id argument is included, only information for the specified routing process is displayed.
interface-typeinterface-number
(Optional) Type and number associated with a specific OSPF interface.
Command Default
When the
showipospftraffic command is entered without any arguments, global OSPF traffic statistics are displayed, including queue statistics for each OSPF process, statistics for each interface, and per-OSPF process statistics.
Command Modes
User EXEC (>) Privileged EXEC (#)
Command History
Release
Modification
12.3(11)T
This command was introduced.
12.0(28)S
This command was integrated into Cisco IOS Release 12.0(28)S.
12.4(6)T
Support for the OSPF Enhanced Traffic Statistics for OSPFv2 and OSPFv3 feature was added.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SRB
This command was integrated into Cisco IOS Release 12.2(33)SRB.
12.2(33)SRC
Support for the OSPF TTL Security Check feature was added.
15.0(1)M
This command was integrated into Cisco IOS Release 15.0(1)M.
Usage Guidelines
You can limit the displayed traffic statistics to those for a specific OSPF process by entering a value for the
process-id argument, or you can limit output to traffic statistics for a specific interface associated with an OSPF process by entering values for the
interface-type and
interface-number arguments. To reset counters and clear statistics, use the
clearipospftraffic command.
Examples
Examples
The following is sample output from the show ip ospf traffic command.
Router# show ip ospf traffic
OSPF statistics:
Rcvd: 5300 total, 730 checksum errors
333 hello, 10 database desc, 3 link state req
24 link state updates, 13 link state acks
Sent: 264 total
222 hello, 12 database desc, 3 link state req
17 link state updates, 12 link state acks
OSPF Router with ID (10.0.1.2) (Process ID 100)
OSPF queues statistic for process ID 100:
OSPF Hello queue size 0, no limit, max size 3
OSPF Router queue size 0, limit 200, drops 0, max size 3
Interface statistics:
Interface Loopback0
OSPF packets received/sent
Invalid Hellos DB-des LS-req LS-upd LS-ack Total
Rx: 0 0 0 0 0 0 0
Tx: 0 0 0 0 0 0 0
OSPF header errors
Length 0, Checksum 0, Version 0, Bad Source 0,
No Virtual Link 0, Area Mismatch 0, No Sham Link 0,
Self Originated 0, Duplicate ID 0, LLS 0,
Authentication 0,
OSPF LSA errors
Type 0, Length 0, Data 0, Checksum 0,
Interface Serial3/0
OSPF packets received/sent
Invalid Hellos DB-des LS-req LS-upd LS-ack Total
Rx: 0 111 3 1 7 6 128
Tx: 0 111 4 1 12 5 133
OSPF header errors
Length 0, Checksum 0, Version 0, Bad Source 0,
No Virtual Link 0, Area Mismatch 0, No Sham Link 0,
Self Originated 0, Duplicate ID 0, LLS 0,
Authentication 0,
OSPF LSA errors
Type 0, Length 0, Data 0, Checksum 0,
Interface Serial2/0
OSPF packets received/sent
Invalid Hellos DB-des LS-req LS-upd LS-ack Total
Rx: 0 0 0 0 0 0 0
Tx: 0 0 0 0 0 0 0
OSPF header errors
Length 0, Checksum 0, Version 0, Bad Source 0,
No Virtual Link 0, Area Mismatch 0, No Sham Link 0,
Self Originated 0, Duplicate ID 0, LLS 0,
Authentication 0,
OSPF LSA errors
Type 0, Length 0, Data 0, Checksum 0,
Interface Ethernet0/0
OSPF packets received/sent
Invalid Hellos DB-des LS-req LS-upd LS-ack Total
Rx: 0 222 7 2 17 7 255
Tx: 0 111 8 2 5 7 133
OSPF header errors
Length 0, Checksum 730, Version 800, Bad Source 0,
No Virtual Link 0, Area Mismatch 0, No Sham Link 0,
Self Originated 3387, Duplicate ID 0, LLS 0,
Authentication 0,
OSPF LSA errors
Type 0, Length 0, Data 0, Checksum 0,
Summary traffic statistics for process ID 100:
Rcvd: 5300 total, 4917 errors
333 hello, 10 database desc, 3 link state req
24 link state upds, 13 link state acks, 0 invalid
Sent: 266 total
222 hello, 12 database desc, 3 link state req
17 link state upds, 12 link state acks, 0 invalid
The table below describes the significant fields shown in the display.
Table 26 show ip ospf traffic Field Descriptions
Field
Description
OSPF statistics
Traffic statistics accumulated for all OSPF processes running on the router. To ensure compatibility with the
showiptraffic command, only checksum errors are displayed. Identifies the route map name.
OSPF queues statistic for process ID
Statistics specific to Cisco IOS software.
OSPF Hello queue
Statistics for the internal Cisco IOS queue between the packet switching code (process IP Input) and the OSPF hello process for all received OSPF packets.
OSPF Router queue
Statistics for the internal Cisco IOS queue between the OSPF hello process and the OSPF router for all received OSPF packets except OSPF hellos.
queue size
Actual size of the queue.
queue limit
Maximum allowed size of the queue.
queue max size
Maximum recorded size of the queue.
Interface statistics
Per-interface traffic statistics for all interfaces that belong to the specific OSPF process ID.
OSPF packets received/sent
Number of OSPF packets received and sent on the interface, sorted by packet types.
OSPF header errors
Packet appears in this section if it was discarded because of an error in the header of an OSPF packet. The discarded packet is counted under the appropriate discard reason. Number of packets dropped due to TTL security check is displayed if that feature has been configured.
OSPF LSA errors
Packet appears in this section if it was discarded because of an error in the header of an OSPF link-state advertisement (LSA). The discarded packet is counted under the appropriate discard reason.
Summary traffic statistics for process ID
Summary traffic statistics accumulated for an OSPF process.
Note
The OSPF process ID is a unique value assigned to the OSPF process in the configuration.
The value for the received errors is the sum of the OSPF header errors that are detected by the OSPF process, unlike the sum of the checksum errors that are listed in the global OSPF statistics.
Examples
The following is sample output from the show ip ospf traffic command. The output has been modified to include the number of packets dropped due a TTL security check.
Router# show ip ospf traffic
.
.
.
OSPF header errors
Length 0, Checksum 0, Version 0, Bad Source 0,
No Virtual Link 0, Area Mismatch 0, No Sham Link 0,
Self Originated 0, Duplicate ID 0, LLS 0,
Authentication 0, TTL Check Fail 2,
.
Examples
The following is sample output from the
showipospftraffic command that displays the detailed traffic information for OSPF packets received and sent on each OSPF interface and OSPF process.
Router# show ip ospf traffic
OSPF statistics:
.
.
.
Interface Ethernet0/0.1
OSPF packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 0 0
RX DB des 0 0
RX LS req 0 0
RX LS upd 0 0
RX LS ack 0 0
RX Total 0 0
TX Failed 0 0
TX Hello 16 1216
TX DB des 0 0
TX LS req 0 0
TX LS upd 0 0
TX LS ack 0 0
TX Total 16 1216
.
.
.
Interface Serial2/0
OSPF packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 11 528
RX DB des 4 148
RX LS req 1 60
RX LS upd 3 216
RX LS ack 2 128
RX Total 21 1080
TX Failed 0 0
TX Hello 14 1104
TX DB des 3 252
TX LS req 1 56
TX LS upd 3 392
TX LS ack 2 128
TX Total 23 1932
.
.
.
Interface Ethernet0/0
OSPF packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 13 620
RX DB des 3 116
RX LS req 1 36
RX LS upd 3 228
RX LS ack 4 216
RX Total 24 1216
TX Failed 0 0
TX Hello 17 1344
TX DB des 4 276
TX LS req 1 56
TX LS upd 7 656
TX LS ack 2 128
TX Total 31 2460
.
.
.
Summary traffic statistics for process ID 1:
OSPF packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 24 1148
RX DB des 7 264
RX LS req 2 96
RX LS upd 6 444
RX LS ack 6 344
RX Total 45 2296
TX Failed 0 0
TX Hello 31 2448
TX DB des 7 528
TX LS req 2 112
TX LS upd 10 1048
TX LS ack 4 256
TX Total 54 4392
OSPF header errors
Length 0, Checksum 0, Version 0, Bad Source 13,
No Virtual Link 0, Area Mismatch 0, No Sham Link 0,
Self Originated 0, Duplicate ID 0, Hello 0,
MTU Mismatch 0, Nbr Ignored 0, LLS 0,
Authentication 0,
OSPF LSA errors
Type 0, Length 0, Data 0, Checksum 0,
To start collecting new statistics, reset the counters and clear the traffic statistics by entering the
clearipospftraffic command as follows:
Router# clear ip ospf traffic
Related Commands
Command
Description
clearipospftraffic
Clears OSPFv2 traffic statistics.
clearipv6ospftraffic
Clears OSPFv3 traffics statistics.
showipv6ospftraffic
Displays OSPFv3 traffic statistics.
show ip ospf virtual-links
To display parameters and the current state of Open Shortest Path First (OSPF) virtual links, use the
showipospfvirtual-links command in EXEC mode.
showipospfvirtual-links
Syntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
Release
Modification
10.0
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
The information displayed by the
showipospfvirtual-links command is useful in debugging OSPF routing operations.
Examples
The following is sample output from the
showipospfvirtual-links command:
Router# show ip ospf virtual-links
Virtual Link to router 192.168.101.2 is up
Transit area 0.0.0.1, via interface Ethernet0, Cost of using 10
Transmit Delay is 1 sec, State POINT_TO_POINT
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 0:00:08
Adjacency State FULL
The table below describes the significant fields shown in the display.
Table 27
showipospfvirtual-links Field Descriptions
Field
Description
Virtual Link to router 192.168.101.2 is up
Specifies the OSPF neighbor, and if the link to that neighbor is up or down.
Transit area 0.0.0.1
The transit area through which the virtual link is formed.
via interface Ethernet0
The interface through which the virtual link is formed.
Cost of using 10
The cost of reaching the OSPF neighbor through the virtual link.
Transmit Delay is 1 sec
The transmit delay (in seconds) on the virtual link.
State POINT_TO_POINT
The state of the OSPF neighbor.
Timer intervals...
The various timer intervals configured for the link.
Hello due in 0:00:08
When the next hello is expected from the neighbor.
Adjacency State FULL
The adjacency state between the neighbors.
show ipv6 ospf
To display general information about Open Shortest Path First ( OSPF) routing processes, use the
showipv6ospf command in user EXEC or privileged EXEC mode.
showipv6ospf [process-id] [area-id] [rate-limit]
Syntax Description
process-id
(Optional) Internal identification. It is locally assigned and can be any positive integer. The number used here is the number assigned administratively when the OSPF routing process is enabled.
area-id
(Optional) Area ID. This argument displays information about a specified area only.
rate-limit
(Optional) Rate-limited link-state advertisements (LSAs). This keyword displays LSAs that are currently being rate limited, together with the remaining time to the next generation.
Command Modes
User EXEC
Privileged EXEC
Command History
Release
Modification
12.0(24)S
This command was introduced.
12.2(15)T
This command was integrated into Cisco IOS Release 12.2(15)T.
12.2(18)S
This command was integrated into Cisco IOS Release 12.2(18)S.
12.3(4)T
Command output is changed when authentication is enabled.
12.2(28)SB
This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(25)SG
This command was integrated into Cisco IOS Release 12.2(25)SG.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.4(9)T
Command output was updated to display OSPF for IPv6 encryption information.
12.4(15)XF
Command output was modified to include VMI PPPoE process-level values.
12.4(15)T
This command was integrated into Cisco IOS Release 12.4(15)T
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
12.2(33)SRC
The
rate-limit keyword was added. Command output was modified to include the configuration values for SPF and LSA throttling timers.
12.2(33)SB
This command was integrated into Cisco IOS Release 12.2(33)SB.
Cisco IOS XE Release 2.1
This command was integrated into Cisco IOS XE Release 2.1.
15.0(1)M
This command was integrated into Cisco IOS Release 12.5(1)M.
15.1(2)T
This command was modified. Support for IPv6 was added to Cisco IOS Release 15.1(2)T.
12.2(50)SY
This command was integrated into Cisco IOS Release 12.2(50)SY.
15.1(1)SG
This command was integrated into Cisco IOS Release 15.1(1)SG.
15.0(1)SY
This command was integrated into Cisco IOS Release 15.0(1)SY.
15.2(2)SNG
This command was implemented on the Cisco ASR 901 Series Aggregation Services devices.
Examples
Examples
The following is sample output from the
showipv6ospf command:
Device# show ipv6 ospf
Routing Process "ospfv3 1" with ID 10.10.10.1
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x000000
Number of areas in this device is 1. 1 normal 0 stub 0 nssa
Area BACKBONE(0)
Number of interfaces in this area is 1
MD5 Authentication, SPI 1000
SPF algorithm executed 2 times
Number of LSA 5. Checksum Sum 0x02A005
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
The table below describes the significant fields shown in the display.
Table 28 show ipv6 ospf Field Descriptions
Field
Description
Routing process "ospfv3 1" with ID 10.10.10.1
Process ID and OSPF device ID.
LSA group pacing timer
Configured LSA group pacing timer (in seconds).
Interface flood pacing timer
Configured LSA flood pacing timer (in milliseconds).
Retransmission pacing timer
Configured LSA retransmission pacing timer (in milliseconds).
Number of areas
Number of areas in device, area addresses, and so on.
Examples
The following sample output shows the
showipv6ospf command with area encryption information:
Device# show ipv6 ospf
Routing Process "ospfv3 1" with ID 10.0.0.1
It is an area border device
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs
LSA group pacing timer 240 secs
Interface flood pacing timer 33 msecs
Retransmission pacing timer 66 msecs
Number of external LSA 0. Checksum Sum 0x000000
Number of areas in this device is 2. 2 normal 0 stub 0 nssa
Reference bandwidth unit is 100 mbps
Area BACKBONE(0)
Number of interfaces in this area is 2
SPF algorithm executed 3 times
Number of LSA 31. Checksum Sum 0x107493
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 20
Flood list length 0
Area 1
Number of interfaces in this area is 2
NULL Encryption SHA-1 Auth, SPI 1001
SPF algorithm executed 7 times
Number of LSA 20. Checksum Sum 0x095E6A
Number of DCbitless LSA 0
Number of indication LSA 0
Number of DoNotAge LSA 0
Flood list length 0
The table below describes the significant fields shown in the display.
Table 29 show ipv6 ospf with Area Encryption Information Field Descriptions
Field
Description
Area 1
Subsequent fields describe area 1.
NULL Encryption SHA-1 Auth, SPI 1001
Displays the encryption algorithm (in this case, null, meaning no encryption algorithm is used), the authentication algorithm (SHA-1), and the security policy index (SPI) value (1001).
The following example displays the configuration values for SPF and LSA throttling timers:
Device# show ipv6 ospf
Routing Process "ospfv3 1" with ID 10.9.4.1
Event-log enabled, Maximum number of events: 1000, Mode: cyclic
It is an autonomous system boundary device
Redistributing External Routes from,
ospf 2
Initial SPF schedule delay 5000 msecs
Minimum hold time between two consecutive SPFs 10000 msecs
Maximum wait time between two consecutive SPFs 10000 msecs
Minimum LSA interval 5 secs
Minimum LSA arrival 1000 msecs
The table below describes the significant fields shown in the display.
Table 30 show ipv6 ospf with SPF and LSA Throttling Timer Field Descriptions
Field
Description
Initial SPF schedule delay
Delay time of SPF calculations.
Minimum hold time between two consecutive SPFs
Minimum hold time between consecutive SPF calculations.
Maximum wait time between two consecutive SPFs 10000 msecs
Maximum hold time between consecutive SPF calculations.
Minimum LSA interval 5 secs
Minimum time interval (in seconds) between link-state advertisements.
Minimum LSA arrival 1000 msecs
Maximum arrival time (in milliseconds) of link-state advertisements.
The following example shows information about LSAs that are currently being rate limited:
Device# show ipv6 ospf rate-limit
List of LSAs that are in rate limit Queue
LSAID: 0.0.0.0 Type: 0x2001 Adv Rtr: 10.55.55.55 Due in: 00:00:00.500
LSAID: 0.0.0.0 Type: 0x2009 Adv Rtr: 10.55.55.55 Due in: 00:00:00.500
The table below describes the significant fields shown in the display.
Table 31 show ipv6 ospf rate-limit Field Descriptions
Field
Description
LSAID
Link-state ID of the LSA.
Type
Description of the LSA.
Adv Rtr
ID of the advertising device.
Due in:
Remaining time until the generation of the next event.
show ipv6 ospf traffic
To display IPv6 Open Shortest Path First Version 3 (OSPFv3) traffic statistics, use the
showipv6ospftrafficcommand in privileged EXEC mode.
(Optional) OSPF process ID for which you want traffic statistics (for example, queue statistics, statistics for each interface under the OSPF process, and per OSPF process statistics).
interface-typeinterface-number
(Optional) Type and number associated with a specific OSPF interface.
Command Default
When the
showipv6ospftraffic command is entered without any arguments, global OSPF traffic statistics are displayed, including queue statistics for each OSPF process, statistics for each interface, and per OSPF process statistics.
Command Modes
Privileged EXEC
Command History
Release
Modification
12.4(6)T
This command was introduced.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SRB
This command was integrated into Cisco IOS Release 12.2(33)SRB.
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
Usage Guidelines
You can limit the displayed traffic statistics to those for a specific OSPF process by entering a value for the
process-id argument, or you can limit output to traffic statistics for a specific interface associated with an OSPF process by entering values for the
interface-type and
interface-number arguments. To reset counters and clear statistics, use the
clearipv6ospftraffic command.
Examples
The following example shows the display output for the
showipv6ospftraffic command for OSPFv3:
Router# show ipv6 ospf traffic
OSPFv3 statistics:
Rcvd: 32 total, 0 checksum errors
10 hello, 7 database desc, 2 link state req
9 link state updates, 4 link state acks
0 LSA ignored
Sent: 45 total, 0 failed
17 hello, 12 database desc, 2 link state req
8 link state updates, 6 link state acks
OSPFv3 Router with ID (10.1.1.4) (Process ID 6)
OSPFv3 queues statistic for process ID 6
Hello queue size 0, no limit, max size 2
Router queue size 0, limit 200, drops 0, max size 2
Interface statistics:
Interface Serial2/0
OSPFv3 packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 5 196
RX DB des 4 172
RX LS req 1 52
RX LS upd 4 320
RX LS ack 2 112
RX Total 16 852
TX Failed 0 0
TX Hello 8 304
TX DB des 3 144
TX LS req 1 52
TX LS upd 3 252
TX LS ack 3 148
TX Total 18 900
OSPFv3 header errors
Length 0, Checksum 0, Version 0, No Virtual Link 0,
Area Mismatch 0, Self Originated 0, Duplicate ID 0,
Instance ID 0, Hello 0, MTU Mismatch 0,
Nbr Ignored 0, Authentication 0,
OSPFv3 LSA errors
Type 0, Length 0, Data 0, Checksum 0,
Interface Ethernet0/0
OSPFv3 packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 6 240
RX DB des 3 144
RX LS req 1 52
RX LS upd 5 372
RX LS ack 2 152
RX Total 17 960
TX Failed 0 0
TX Hello 11 420
TX DB des 9 312
TX LS req 1 52
TX LS upd 5 376
TX LS ack 3 148
TX Total 29 1308
OSPFv3 header errors
Length 0, Checksum 0, Version 0, No Virtual Link 0,
Area Mismatch 0, Self Originated 0, Duplicate ID 0,
Instance ID 0, Hello 0, MTU Mismatch 0,
Nbr Ignored 0, Authentication 0,
OSPFv3 LSA errors
Type 0, Length 0, Data 0, Checksum 0,
Summary traffic statistics for process ID 6:
OSPFv3 packets received/sent
Type Packets Bytes
RX Invalid 0 0
RX Hello 11 436
RX DB des 7 316
RX LS req 2 104
RX LS upd 9 692
RX LS ack 4 264
RX Total 33 1812
TX Failed 0 0
TX Hello 19 724
TX DB des 12 456
TX LS req 2 104
TX LS upd 8 628
TX LS ack 6 296
TX Total 47 2208
OSPFv3 header errors
Length 0, Checksum 0, Version 0, No Virtual Link 0,
Area Mismatch 0, Self Originated 0, Duplicate ID 0,
Instance ID 0, Hello 0, MTU Mismatch 0,
Nbr Ignored 0, Authentication 0,
OSPFv3 LSA errors
Type 0, Length 0, Data 0, Checksum 0,
The network administrator wants to start collecting new statistics, resetting the counters and clearing the traffic statistics by entering the
clearipv6ospftraffic command as follows:
Router# clear ipv6 ospf traffic
The table below describes the significant fields shown in the display.
Table 32 show ipv6 ospf traffic Field Descriptions
Field
Description
OSPFv3 statistics
Traffic statistics accumulated for all OSPF processes running on the router. To ensure compatibility with the
showiptraffic command, only checksum errors are displayed. Identifies the route map name.
OSPFv3 queues statistic for process ID
Queue statistics specific to Cisco IOS software.
Hello queue
Statistics for the internal Cisco IOS queue between the packet switching code (process IP Input) and the OSPF hello process for all received OSPF packets.
Router queue
Statistics for the internal Cisco IOS queue between the OSPF hello process and the OSPF router for all received OSPF packets except OSPF hellos.
queue size
Actual size of the queue.
queue limit
Maximum allowed size of the queue.
queue max size
Maximum recorded size of the queue.
Interface statistics
Per-interface traffic statistics for all interfaces that belong to the specific OSPFv3 process ID.
OSPFv3 packets received/sent
Number of OSPFv3 packets received and sent on the interface, sorted by packet types.
OSPFv3 header errors
Packet appears in this section if it was discarded because of an error in the header of an OSPFv3 packet. The discarded packet is counted under the appropriate discard reason.
OSPFv3 LSA errors
Packet appears in this section if it was discarded because of an error in the header of an OSPF link-state advertisement (LSA). The discarded packet is counted under the appropriate discard reason.
Summary traffic statistics for process ID
Summary traffic statistics accumulated for an OSPFv3 process.
Note
The OSPF process ID is a unique value assigned to the OSPFv3 process in the configuration.
The value for the received errors is the sum of the OSPFv3 header errors that are detected by the OSPFv3 process, unlike the sum of the checksum errors that are listed in the global OSPF statistics.
Related Commands
Command
Description
clearipospftraffic
Clears OSPFv2 traffic statistics.
clearipv6ospftraffic
Clears OSPFv3 traffic statistics.
showipospftraffic
Displays OSPFv2 traffic statistics.
show ospfv3 multi-area
To display information about the Open
Shortest Path First version 3 (OSPFv3) multiarea interfaces, use the
show ospfv3 multi-area
command in user EXEC or privileged EXEC
mode.
show ospfv3 multi-area
Command Default
No OSPFv3 multiarea interface information is displayed.
Command Modes
User EXEC (>)
Privileged EXEC (#)
Command History
Release
Modification
Cisco IOS XE Release 3.11S
This command was introduced.
Examples
The following example shows sample output from
the show ospfv3
multi-area
command:
Device# show ip ospf 1 multi-area
OSPF_MA1 is up, line protocol is up
Primary Interface Ethernet0/0, Area 100
Interface ID 7
MTU is 1500 bytes
Neighbor Count is 1
Related Commands
Command
Description
ospfv3 multi-area cost
Specifies the cost of sending a packet on an OSPFv3 multiarea interface.
show ospfv3 sham-links
To display parameters and the current state of Open Shortest Path First version 3 (OSPFv3) sham links, use the
showospfv3sham-links command in user EXEC or privileged EXEC mode.
(Optional) Internal identification. The number used here is the number assigned administratively when enabling the OSPFv3 routing process and can be a value from 1 through 65535.
address-family
(Optional) Enter
ipv6 for the IPv6 address family or
ipv4 for the IPv4 address family.
vrf
(Optional) VPN Routing/Forwarding instance.
{vrf-name |
*}
The virtual routing and forwarding table for which the information should be displayed. If this parameter is not specified, only information for the global routing table is shown. A VRF name of "*" displays information for all VRFs, including the global table.
Command Modes
User EXEC or Privileged EXEC
Command History
Release
Modification
Cisco IOS XE Release 3.6S
This command was introduced.
15.2(4)S
This command was integrated into Cisco IOS Release 15.2(4)S.
15.2(4)M
This command was integrated into Cisco IOS Release 15.2(4)M.
Examples
The following example displays OSPFv3 sham-link information for all VRFs:
Router# show ospfv3 vrf * sham-links
OSPFv3 1 address-family ipv6 vrf v1 (router-id 8.0.0.22)
Sham Link OSPFv3_SL1 to address 2001:111::824 is up
Interface ID 39
Area 0 source address 2001:111::822
Run as demand circuit
DoNotAge LSA allowed.
Cost of using 1
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Adjacency State FULL (Hello suppressed)
Index 1/2/2, retransmission queue length 0, number of retransmission 0
First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0)
Last retransmission scan length is 0, maximum is 0
Last retransmission scan time is 0 msec, maximum is 0 msec
Table 1
show ospfv3 virtual-links Field Descriptions Field Description
Sham Link OSPFv3_SL1 to address 2001:111::824 is up Specifies the
OSPFv3 neighbor, and if the link to that neighbor is up or down.
Interface ID Interface ID and IPv6 address of the router.
Area 0 source address 2001:111::822 The area the sham link is in and the IPv6 source address of the local
endpoint.
Cost of using 1 The cost of reaching the OSPFv3 neighbor through the sham link.
Transmit Delay is 1 sec The transmit delay (in seconds) on the sham link.
State POINT_TO_POINT The state of the OSPFv3 neighbor.
Timer intervals... The various timer intervals configured for the link.
Adjacency State FULL (Hello suppressed) The neighbor adjacency state.
shutdown (router OSPF)
To initiate a graceful shutdown of the Open Shortest Path First (OSPF) protocol under the current instance, use the shutdown command in router configuration mode. To restart the OSPF protocol, use the noform of this command.
shutdown
noshutdown
Syntax Description
This command has no arguments or keywords.
Command Default
OSPF stays active under the current instance.
Command Modes
Router configuration (config-router)
Command History
Release
Modification
12.2(33)SRC
This command was introduced.
15.0(1)M
This command was integrated into Cisco IOS Release 15.0(1)M.
Usage Guidelines
Use the shutdown command in router configuration mode to temporarily shut down a protocol in the least disruptive manner and to notify its neighbors that it is going away. All traffic that has another path through the network will be directed to that alternate path.
Examples
The following example shows how to enable a graceful shutdown of the OSPF protocol:
Initiates a graceful shutdown on a specific OSPF interface.
snmp-server enable traps ospf
T
o enable all Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF), use the snmp-serverenabletrapsospfcommand in global configuration mode. To disable all SNMP notifications for OSPF, use the noform of this command.
snmp-serverenabletrapsospf
nosnmp-serverenabletrapsospf
Syntax Description
This command has no arguments or keywords.
Command Default
SNMP notifications for OSPF are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.0(30)S
This command was introduced.
12.3(14)T
This command was integrated into Cisco IOS Release 12.3(14)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
If you wish to enable or disable specific OSPF SNMP notifications, enter one or more of the following commands of the following commands:
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) configuration mismatch errors, use the snmp-serverenabletrapsospfcisco-specificerrorscommand in global configuration mode. To disable SNMP notifications for OSPF configuration mismatch errors, use the noform of this command.
(Optional) Enables SNMP notifications only for configuration mismatch errors on nonvirtual interfaces.
virt-config-error
(Optional) Enables SNMP notifications only for configuration mismatch errors on virtual interfaces.
Command Default
SNMP notifications for OSPF configuration mismatch errors are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.0(30)S
This command was introduced.
12.3(14)T
This command was integrated into Cisco IOS Release 12.3(14)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
To enable the SNMP notifications for OSPF configuration errors for both virtual and nonvirtual interfaces, enter the snmp-serverenabletrapsospfcisco-specificerrorscommand in global configuration mode without the optional keywords.
Examples
The following example enables the router to send OSPF configuration mismatch errors only for nonvirtual interfaces:
To e
nable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) nonvirtual interface mismatch errors, use the snmp-serverenabletrapsospfcisco-specificerrorsconfig-errorcommand in global configuration mode. To disable OSPF nonvirtual interface mismatch error SNMP notifications, use the no form of this command.
This command is disabled by default; therefore, SNMP notifications for OSPF nonvirtual interface mismatch errors are not created.
Command Modes
Global configuration
Command History
Release
Modification
12.3(5)
This command was introduced.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.0(26)S
This command was integrated into Cisco IOS Release 12.0(26)S.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
Usage Guidelines
To enable the cospfShamLinkConfigError trap, you must first enter the snmp-serverenabletrapsospfcisco-specificerrorsconfig-error command in global configuration mode. The snmp-serverenabletrapsospfcisco-specificerrorsconfig-error command enables the cospfConfigError trap, so that both traps can be generated at the same place and maintain consistency with a similar case for configuration errors across virtual links.
If you try to enable the cospfShamLinkConfigError trap before configuring the cospfospfConfigError trap you will receive an error message stating you must first configure the cospfConfigError trap.
Examples
The following example enables the router to send nonvirtual interface mismatch error notifications to the host at the address myhost.cisco.com using the community string defined as public:
Router(config)# snmp-server enable traps ospf cisco-specific errors config-error
Router(config)# snmp-server host myhost.cisco.com informs version 2c public
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) sham-link errors, use the snmp-serverenabletrapsospfcisco-specificerrorsshamlinkcommand in global configuration mode. To disable OSPF sham-link error SNMP notifications, use the noform of this command.
(Optional) Enables SNMP notifications only for authentication failures on OSPF sham-link interfaces.
bad-packet
(Optional) Enables SNMP notifications only for packet parsing failures on OSPF sham-link interfaces.
config
(Optional) Enables SNMP notifications only for configuration mismatch errors on OSPF sham-link interfaces.
Command Default
This command is disabled by default; therefore, SNMP notifications for OSPF sham-link errors are not created.
Command Modes
Global configuration
Command History
Release
Modification
12.0(30)S
This command was introduced.
12.3(14)T
This command was integrated into Cisco IOS Release 12.3(14)T.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
Usage Guidelines
To enable the cospfShamLinkConfigError trap, you must first enter the snmp-serverenabletrapsospfcisco-specificerrorsconfig-error command in global configuration mode. The snmp-serverenabletrapsospfcisco-specificerrorsconfig-error command enables the cospfConfigError trap, so that both traps can be generated at the same place and maintain consistency with a similar case for configuration errors across virtual links.
If you try to enable the cospfShamLinkConfigError trap before configuring the cospfospfConfigError trap you will receive an error message stating you must first configure the cospfConfigError trap.
Examples
The following example enables the router to send OSPF sham-link error notifications to the host at the address myhost.cisco.com using the community string defined as public:
Enables SNMP notifications for OSPF transition state changes.
snmp-server enable traps ospf cisco-specific lsa
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) opaque link-state advertisements (LSAs), use the snmp-serverenabletrapsospfcisco-specificlsacommand in global configuration mode. To disable SNMP notifications for OSPF opaque LSAs, use the noform of this command.
(Optional) Enables SNMP notifications only for opaque OSPF LSAs that have reached the maximum age.
lsa-originate
(Optional) Enables SNMP notifications only for opaque OSPF LSAs that are newly originated.
Command Default
SNMP notifications for OSPF opaque LSAs are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.0(30)S
This command was introduced.
12.3(14)T
This command was integrated into Cisco IOS Release 12.3(14)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
The snmp-serverenabletrapsospfcisco-specificlsa command enables the traps that are defined by the CISCO-OSPF-TRAP-MIB for opaque LSAs. An opaque link-state advertisement (LSA) is used in MPLS traffic engineering to distribute attributes such as capacity and topology of links in a network. The scope of this LSA can be confined to the local network (Type 9, Link-Local), OSPF area (Type 20, Area-Local), or Autonomous System (Type 11, AS scope). The information in an opaque LSA can be used by an external application across the OSPF network. To enable the cospfMaxAgeLsa trap, enter the snmp-serverenabletrapsospfcisco-specificlsacommand with the lsa-maxage keyword. To enable the cospfOriginateLsa trap, enter the snmp-serverenabletrapsospfcisco-specificlsacommand with the lsa-originate keyword. When you enter the snmp-serverenabletrapsospfcisco-specificlsa command without either keyword, both traps will be enabled.
Examples
The following example enables the router to send OSPF opaque LSA notifications to the host at the address myhost.cisco.com using the community string defined as public whenever new opaque LSAs are created:
Router(config)# snmp-server enable traps ospf cisco-specific lsa lsa-originate
Router(config)# snmp-server host myhost.cisco.com informs version 2c public
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) retransmission errors, use the snmp-serverenabletrapsospfcisco-specificretransmitcommand in global configuration mode. To disable OSPF sham-link error SNMP notifications, use the noform of this command.
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) transition state changes, use the snmp-serverenabletrapsospfcisco-specificstate-changecommand in global configuration mode. To disable OSPF transition state change SNMP notifications, use the noform of this command.
(Optional) Enables only not-so-stubby area (NSSA) translator state changes trap for the OSPF area.
shamlink
(Optional) Enables only the sham-link transition state changes trap for the OSPF area.
interface
(Optional) Enables only the sham-link interface state changes trap for the OSPF area.
interface-old
(Optional) Enables only the replaced interface transition state changes trap for the OSPF area.
neighbor
(Optional) Enables only the sham-link neighbor transition state changes trap for the OSPF area.
Command Default
This command is disabled by default; therefore, SNMP notifications for OSPF transition state changes are not created.
Command Modes
Global configuration
Command History
Release
Modification
12.3(5)
This command was introduced.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.0(26)S
This command was integrated into Cisco IOS Release 12.0(26)S.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.0(30)S
The shamlink,interface-old, and neighbor keywords were added.
12.3(14)T
Support was added for the shamlink,interface-old, and neighbor keywords.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
Usage Guidelines
You cannot enter both the interface and interface-old keywords because you cannot enable both the new and replaced sham-link interface transition state change traps. You can configure only one of the two traps, but not both.
Examples
The following example enables the router to send OSPF sham-link transition state change notifications to the host at the address myhost.cisco.com using the community string defined as public:
Router(config)# snmp-server enable traps ospf cisco-specific state-change shamlink
Router(config)# snmp-server host myhost.cisco.com informs version 2c public
Enables SNMP notifications for OSPF retransmission errors.
snmp-server enable traps ospf errors
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) errors, use the snmp-serverenabletrapsospferrorscommand in global configuration mode. To disable SNMP notifications for OSPF errors, use the noform of this command.
(Optional) Enables only the ospfIfFailure trap. Allows SNMP notifications to be sent when a packet has been received on a nonvirtual interface from a neighbor router whose authentication key or authentication type conflicts with the authentication key or authentication type of this router.
bad-packet
(Optional) Enables only the ospfIfRxBadPacket trap. Allows SNMP notifications to be sent when an OSPF packet that has not been parsed has been received on a nonvirtual interface.
config-error
(Optional) Enables only the ospfIfConfigError trap. Sends SNMP notifications when a packet has been received in a nonvirtual interface from a neighbor router whose configuration parameters conflict with the configuration parameters of this router.
virt-authentication-failure
(Optional) Enables only the ospfVirtIfFailure trap. Allows SNMP notifications to be sent when a packet has been received on a virtual interface from a neighbor router whose authentication key or authentication type conflicts with the authentication key or authentication type of this router.
virt-bad-packet
(Optional) Enables only the ospfVirtIfRxBadPacket trap. Allows SNMP notifications to be sent when an OSPF packet that has not been parsed has been received on a virtual interface.
virt-config-error
(Optional) Enables only the ospfVirtIfConfigError trap. Sends SNMP notifications when a packet has been received in a virtual interface from a neighbor router whose configuration parameters conflict with the configuration parameters of this router.
Command Default
SNMP notifications for OSPF errors are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.3(5)
This command was introduced.
12.0(26)S
This command was integrated into Cisco IOS Release 12.0(26)S. Support was added for the OSPF MIB.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
When you enter the snmp-serverenabletrapsospferrors command without any optional keywords, all OSPF error traps will be enabled. To enable only one or more OSPF error traps, enter one or more of the optional keywords.
Examples
The following example enables the router to send all OSPF error notifications:
Enables SNMP notifications for OSPF Cisco-specific transition state changes.
snmp-serverenabletrapsospflsa
Enables SNMP notifications for OSPF LSAs.
snmp-serverenabletrapsospfrate-limit
Limits the number of OSPF traps that are sent during a specified number of seconds.
snmp-serverenabletrapsospfretransmit
Enables SNMP notifications for OSPF packet retransmissions.
snmp-serverenabletrapsospfstate-change
Enables SNMP notifications for OSPF transition state changes.
snmp-server enable traps ospf lsa
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) link-state advertisements (LSAs), use the snmp-serverenabletrapsospflsacommand in global configuration mode. To disable SNMP notifications for OSPF LSAs, use the noform of this command.
(Optional) Enables only the ospfMaxAgeLsa trap. Allows SNMP notifications to be sent when an LSA in the OSPF link-state database of the router has reached the maximum age.
lsa-originate
(Optional) Enables only the ospfOriginateLsa trap. Enables SNMP notifications when a new LSA has been originated by the router as a result of a topology change.
Command Default
SNMP notifications for OSPF LSAs are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.3(5)
This command was introduced.
12.0(26)S
This command was integrated into Cisco IOS Release 12.0(26)S. Support was added for the OSPF MIB.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
The snmp-serverenabletrapsospflsacommand enables the traps for standard LSAs that are defined by the OSPF-MIB. To enable the ospfMaxAgeLsa trap, enter the snmp-serverenabletrapsospflsacommand with the lsa-maxage keyword. To enable the ospfOriginateLsa trap, enter the snmp-serverenabletrapsospflsacommand with the lsa-originate keyword. When the ospfOriginateLsa trap is enabled, it will not be invoked for simple LSA refreshes that take place every 30 minutes or when an LSA has reached its maximum age and is being flushed. When you enter the snmp-serverenabletrapsospflsa command without either keyword, both traps will be enabled.
To enable the traps that are defined by the CISCO-OSPF-TRAP-MIB for opaque LSAs, enter the snmp-serverenabletrapsospfcisco-specificlsacommand in global configuration mode.
Examples
The following example enables the router to send SNMP notifications when new LSAs are originated by the router as a result of a topology change:
Enables SNMP notifications for OSPF Cisco-specific transition state changes.
snmp-serverenabletrapsospferrors
Enables SNMP notifications for OSPF errors.
snmp-serverenabletrapsospfrate-limit
Limits the number of OSPF traps that are sent during a specified number of seconds.
snmp-serverenabletrapsospfretransmit
Enables SNMP notifications for OSPF packet retransmissions.
snmp-serverenabletrapsospfstate-change
Enables SNMP notifications for OSPF transition state changes.
snmp-server enable traps ospf rate-limit
T
o limit the number of Open Shortest Path First (OSPF) traps that are sent during a specified number of seconds, use the snmp-serverenabletrapsospfrate-limitcommand in global configuration mode. To disable the limit placed on the number of OSPF traps sent during a specified number of seconds, use the noform of this command.
Sets the rate limit window size, in seconds. A number from 2 to 60. The default value is 10.
trap-number
Sets the maximum number of traps sent during the window time. A number from 0 to 300. The default number is 7.
Command Default
No limit is placed on the number of OSPF traps sent.
Command Modes
Global configuration
Command History
Release
Modification
12.0(26)S
This command was introduced.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
There is a possibility that a router sends trap bursts, which can drain network resources in a small interval of time. It is recommended that you enter the snmp-serverenabletrapsospfrate-limit command to configure a sliding window mechanism that will limit the number of traps that are sent within a specified number of seconds.
Examples
The following example sets the trap rate limit window so that during a 40-second window of time, no more that 50 traps are sent.
Enables SNMP notifications for OSPF Cisco-specific transition state changes.
snmp-serverenabletrapsospferrors
Enables SNMP notifications for OSPF errors.
snmp-serverenabletrapsospflsa
Enables SNMP notifications for OSPF LSAs.
snmp-serverenabletrapsospfretransmit
Enables SNMP notifications for OSPF packet retransmissions.
snmp-serverenabletrapsospfstate-change
Enables SNMP notifications for OSPF transition state changes.
snmp-server enable traps ospf retransmit
T
o enable Simple Network Management Protocol (SNMP) notifications when packets are re-sent in an Open Shortest Path First (OSPF) network, use the snmp-serverenabletrapsospfretransmitcommand in global configuration mode. To disable SNMP notifications, use the noform of this command.
(Optional) Enables only the ospfTxRetransmit trap. Allows SNMP notifications to be sent when an OSPF packet has been re-sent on a nonvirtual interface.
virt-packets
(Optional) Enables only the ospfVirtTxRetransmit trap. Allows SNMP notifications to be sent when an OSPF packet has been re-sent on a virtual interface.
Command Default
SNMP notifications are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.0(26)S
This command was introduced.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(31)SB2
This command was integrated into Cisco IOS Release 12.2(31)SB2.
Usage Guidelines
To enable the ospfTXRetransmit trap so that SNMP notifications are sent only when packets from nonvirtual interfaces are re-sent, enter the snmp-serverenabletrapsospfretransmitcommand with the packets keyword. To enable the ospfTxRetransmit trap so that SNMP notifications are sent only when packets from virtual interfaces are re-sent, enter the snmp-serverenabletrapsospfretransmitcommand with the virt-packets keyword. When you enter the snmp-serverenabletrapsospfretransmit command without either keyword, both traps will be enabled.
Examples
The following example enables the router to send SNMP notifications when packets are re-sent by virtual interfaces:
Enables SNMP notifications for OSPF Cisco-specific transition state changes.
snmp-serverenabletrapsospferrors
Enables SNMP notifications for OSPF errors.
snmp-serverenabletrapsospflsa
Enables SNMP notifications for OSPF LSAs.
snmp-serverenabletrapsospfrate-limit
Limits the number of OSPF traps that are sent during a specified number of seconds.
snmp-serverenabletrapsospfstate-change
Enables SNMP notifications for OSPF transition state changes.
snmp-server enable traps ospf state-change
T
o enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First (OSPF) transition state changes, use the snmp-serverenabletrapsospfstate-changecommand in global configuration mode. To disable SNMP notifications for OSPF transition state changes, use the noform of this command.
(Optional) Enables only the ospfIfStateChange trap. Sends SNMP notifications when there has been a change in the state of a nonvirtual OSPF interface.
neighbor-state-change
(Optional) Enables only the ospfNbrStateChange trap. Sends SNMP notifications when there has been a change in the state of a nonvirtual OSPF neighbor.
virtif-state-change
(Optional) Enables only the ospfVirtIfStateChange trap. Sends SNMP notifications when there has been a change in the state of a virtual OSPF interface.
virtneighbor-state-change
(Optional) Enables only the ospfVirtNbrStateChange trap. Sends SNMP notifications when there has been a change in the state of a virtual OSPF neighbor.
Command Default
SNMP notifications for OSPF transition state changes are disabled.
Command Modes
Global configuration
Command History
Release
Modification
12.0(26)S
This command was introduced.
12.3(4)T
This command was integrated into Cisco IOS Release 12.3(4)T.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
Usage Guidelines
To enable all traps for transition state changes, enter the snmp-serverenabletrapsospfstate-change command without of the optional keywords.
Examples
The following example enables the router to send SNMP notifications for transition state changes for virtual interfaces and virtual neighbors:
Enables SNMP notifications for OSPF Cisco-specific transition state changes.
snmp-serverenabletrapsospferrors
Enables SNMP notifications for OSPF errors.
snmp-serverenabletrapsospflsa
Enables SNMP notifications for OSPF LSAs.
snmp-serverenabletrapsospfrate-limit
Limits the number of OSPF traps that are sent during a specified number of seconds.
snmp-serverenabletrapsospfretransmit
Enables SNMP notifications for OSPF packet retransmissions.
snmp-server snmp traps ospfv3 errors
To enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First version 3 (OSPFv3) errors, use the
snmp-serverenabletrapsospfv3errors command in global configuration mode. To disable SNMP notifications for OSPFv3 errors, use the
no form of this command.
(Optional) Enables SNMP notifications to be sent when an OSPFv3 packet that could not be parsed has been received on a nonvirtual interface.
config-error
(Optional) Enables SNMP notifications when a packet has been received in a nonvirtual interface from a neighbor router whose configuration parameters conflict with the configuration parameters of this router.
virt-bad-packet
(Optional) Enables SNMP notifications to be sent when an OSPFv3 packet that could not be parsed has been received on a virtual interface.
virt-config-error
(Optional) Enables SNMP notifications when a packet has been received in a virtual interface from a neighbor router whose configuration parameters conflict with the configuration parameters of this router.
Command Default
SNMP notifications for OSPFv3 errors are disabled.
Command Modes
Global configuration (config)
Command History
Release
Modification
15.2(4)M
This command was introduced.
15.2(4)S
This command was integrated into Cisco IOS Release 15.2(4)S.
Cisco IOS XE Release 3.7S
This command was integrated into Cisco IOS XE Release 3.7S.
Usage Guidelines
When you enter the
snmp-serverenabletrapsospfv3errors command without any optional keywords, all OSPFv3 error traps will be enabled. To enable only one or more OSPFv3 error traps, enter one or more of the optional keywords.
Examples
The following example enables the router to send all OSPFv3 error notifications:
Limits the number of OSPFv3 traps that are sent during a specified number of seconds.
snmp-serverenabletrapsospfv3state-change
Enables SNMP notifications for OSPFv3 transition state changes.
snmp-server snmp traps ospfv3 rate-limit
To limit the number of Open Shortest Path First Version 3 (OSPFv3) traps that are sent during a specified number of seconds, use the
snmp-serverenabletrapsospfv3rate-limit command in global configuration mode. To disable the limit placed on the number of OSPF traps sent during a specified number of seconds, use the
no form of this command.
Sets the rate limit window size, in seconds. The range is from 2 to 60. The default value is 10.
trap-number
Sets the maximum number of traps sent during the window time. The range is from 0 to 300. The default number is 7.
Command Default
No limit is placed on the number of OSPFv3 traps sent.
Command Modes
Global configuration (config)
Command History
Release
Modification
15.2(4)M
This command was introduced.
15.2(4)S
This command was integrated into Cisco IOS Release 15.2(4)S.
Cisco IOS XE Release 3.7S
This command was integrated into Cisco IOS XE Release 3.7S.
Usage Guidelines
There is a possibility that a router sends trap bursts, which can drain network resources in a small interval of time. We recommend that you enter the
snmp-serverenabletrapsospfv3rate-limit command to configure a sliding window mechanism that will limit the number of traps that are sent within a specified number of seconds.
Examples
The following example sets the trap rate limit window so that during a 40-second window of time, no more than 50 traps are sent.
Enables SNMP notifications for OSPFv3 transition state changes.
snmp-server snmp traps ospfv3 state-change
To enable Simple Network Management Protocol (SNMP) notifications for Open Shortest Path First Version 3 (OSPFv3) transition state changes, use the
snmp-serverenabletrapsospfv3state-change command in global configuration mode. To disable SNMP notifications for OSPFv3 transition state changes, use the
no form of this command.
Limits the number of OSPFv3 traps that are sent during a specified number of seconds.
summary-address (OSPF)
To create
aggregate addresses for
Open Shortest Path First (OSPF),
use the summary-address command in router configuration mode. To restore the default, use the no form of this command.
Summary address designated for a range of addresses.
mask
IP subnet mask used for the summary route.
prefix
IP route prefix for the destination.
not-advertise
(Optional) Suppresses routes that match the specified prefix/mask pair. This keyword applies to OSPF only.
tagtag
(Optional) Specifies the tag value that can be used as a “match” value for controlling redistribution via route maps. This keyword applies to OSPF only.
nssa-only
(Optional) Sets the nssa-only attribute for the summary route (if any) generated for the specified prefix, which limits the summary to not-so-stubby-area (NSSA) areas.
Command Default
This command behavior is disabled by default.
Command Modes
Router configuration
Command History
Release
Modification
10.0
This command was introduced.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
15.0(1)M
This command was modified. The nssa-only keyword was added.
Usage Guidelines
R
outes learned from other routing protocols can be summarized. The metric used to advertise the summary is the lowest metric of all the more specific routes. This command helps reduce the size of the routing table.
Using this command for OSPF causes an OSPF Autonomous System Boundary Router (ASBR) to advertise one external route as an aggregate for all redistributed routes that are covered by the address. For OSPF, this command summarizes only routes from other routing protocols that are being redistributed into OSPF. Use the arearange command for route summarization between OSPF areas.
OSPF does not support the summary-address0.0.0.00.0.0.0command.
Examples
In the following example, the summary address 10.1.0.0 includes address 10.1.1.0, 10.1.2.0, 10.1.3.0, and so on. Only the address 10.1.0.0 is advertised in an external link-state advertisement.
summary-address 10.1.0.0 255.255.0.0
Related Commands
Command
Description
arearange
Consolidates and summarizes routes at an area boundary.
ipospfauthentication-key
Assigns a password to be used by neighboring routers that are using the simple password authentication of OSPF.
ipospfmessage-digest-key
Enables OSPF MD5 authentication.
timers lsa arrival
To set the minimum interval at which the software accepts the same link-state advertisement (LSA) from Open Shortest Path First (OSPF) neighbors, use the
timerslsaarrivalcommand in router configuration mode. To restore the default value, use the
no form of this command.
timerslsaarrivalmilliseconds
notimerslsaarrival
Syntax Description
milliseconds
Minimum delay in milliseconds that must pass between acceptance of the same LSA arriving from neighbors. The range is from 0 to 600,000 milliseconds. The default is 1000 milliseconds.
Command Default
1000 milliseconds
Command Modes
OSPF for IPv6 router configuration (config-rtr) Router configuration (config-router)
Command History
Release
Modification
12.0(25)S
This command was introduced.
12.2(27)SBC
This command was integrated into Cisco IOS Release 12.2(27)SBC.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
12.2(33)SRC
Support for IPv6 was added.
12.2(33)SB
Support for IPv6 was added.
Cisco IOS XE Release 2.1
This command was introduced on Cisco ASR 1000 Series Routers.
15.0(1)M
This command was integrated into Cisco IOS Release 12.5(1)M.
12.2(33)XNE
This command was modified. It was integrated into Cisco IOS Release 12.2(33)XNE.
Usage Guidelines
The
timerslsaarrival command controls the minimum interval for accepting the same LSA. The “same LSA” is defined as an LSA instance that contains the same LSA ID number, LSA type, and advertising router ID. If an instance of the same LSA arrives sooner than the interval that is set, the LSA is dropped.
We suggest you keep the
millisecondsvalue of the
timerslsaarrival command less than or equal to the neighbors’
hold-interval value of the
timersthrottlelsaall command.
Examples
The following example sets the minimum interval for accepting the same LSA at 2000 milliseconds:
router ospf 1
log-adjacency-changes
timers throttle lsa all 200 10000 45000
timers lsa arrival 2000
network 10.10.4.0 0.0.0.255 area 24
network 10.10.24.0 0.0.0.255 area 24
Related Commands
Command
Description
showipospftimersrate-limit
Displays all of the LSAs in the rate limit queue.
showipv6ospftimersrate-limit
Displays all of the LSAs in the IPv6 rate limit queue
timersthrottlelsa
Sets rate-limiting values for OSPF for IPv6 LSA generation.
timersthrottlelsaall
Sets rate-limiting values for LSAs being generated.
timers pacing flood
To configure link-state advertis ement (LSA) flood packet pacing, use the
timerspacingflood command in router configuration mode. To restore the default flood packet pacing value, use the
no form of this command.
timerspacingfloodmilliseconds
notimerspacingflood
Syntax Description
milliseconds
Time (in milliseconds) at which LSAs in the flooding queue are paced in between updates. The configurable range is from 5 milliseconds to 100 milliseconds. The default value is 33 milliseconds.
Command Default
33 milliseconds
Command Modes
Router configuration
Command History
Release
Modification
12.2(4)T
This command was introduced.
12.2(14)S
This command was integrated into Cisco IOS Release 12.2(14)S.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
Configuring Open Shortest Path First (OSPF) flood pacing timers allows you to control interpacket spacing between consecutive link-state update packets in the OSPF transmission queue. This command allows you to control the rate at which LSA updates occur so that high CPU or buffer utilization that can occur when an area is flooded with a very large number of LSAs can be reduced.
The default settings for OSPF packet pacing timers are suitable for the majority of OSPF deployments. Do not change the packet pacing timers unless all other options to meet OSPF packet flooding requirements have been exhausted. Specifically, network operators should prefer summarization, stub area usage, queue tuning, and buffer tuning before changing the default flood timers. Furthermore, there are no guidelines for changing timer values; each OSPF deployment is unique and should be considered on a case-by-case basis. The network operator assumes risks associated with changing the default flood timer values.
Examples
The following example configures LSA flood packet-pacing updates to occur in 55-millisecond intervals for Open Shortest Path First (OSPF) routing process 1:
Displays general information about OSPF routing processes.
timerspacinglsa-group
Changes the interval at which OSPF LSAs are collected into a group and refreshed, checksummed, or aged.
timerspacingretransmission
Configures LSA retransmission packet pacing.
timers pacing lsa-group
To change th e interval at which Open Shortest Path First ( OSPF) link-state advertisements (LSAs) are collected into a group and refreshed, checksummed, or aged, use the
timerspacinglsa-groupcommandin router configuration mode. To restore the default value, use the
no form of this command.
timerspacinglsa-groupseconds
notimerspacinglsa-group
Syntax Description
seconds
Number of seconds in the interval at which LSAs are grouped and refreshed, checksummed, or aged. The range is from 10 to 1800 seconds. The default value is 240 seconds.
Command Default
The default interval for this command is 240 seconds. OSPF LSA group pacing is enabled by default.
Command Modes
Router configuration
Command History
Release
Modification
11.3AA
This command was introduced.
12.2(4)T
The syntax of this command was changed from timerslsa-group-pacing to timers pacing lsa-group.
12.2(14)S
This command was integrated into Cisco IOS Release 12.2(14)S.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
This command allows you to control the rate at which LSA updates occur so that high CPU or buffer utilization that can occur when an area is flooded with a very large number of LSAs can be reduced. The default settings for OSPF packet pacing timers are suitable for the majority of OSPF deployments. Do not change the packet pacing timers unless all other options to meet OSPF packet flooding requirements have been exhausted. Specifically, network operators should prefer summarization, stub area usage, queue tuning, and buffer tuning before changing the default flooding timers. Furthermore, there are no guidelines for changing timer values; each OSPF deployment is unique and should be considered on a case-by-case basis. The network operator assumes the risks associated with changing the default timer values.
Cisco IOS software groups the periodic refresh of LSAs to improve the LSA packing density for the refreshes in large topologies. The group timer controls the interval used for group refreshment of LSAs; however, this timer does not change the frequency that individual LSAs are refreshed (the default refresh rate is every 30 minutes).
The duration of the LSA group pacing is inversely proportional to the number of LSAs the router is handling. For example, if you have about 10,000 LSAs, decreasing the pacing interval would benefit you. If you have a very small database (40 to 100 LSAs), increasing the pacing interval to 10 to 20 minutes might benefit you slightly.
Examples
The following example configures OSPF group packet-pacing updates between LSA groups to occur in 60-second intervals for OSPF routing process 1:
Displays general information about OSPF routing processes.
timerspacingflood
Configures LSA flood packet pacing.
timerspacingretransmission
Configures LSA retransmission packet pacing.
timers pacing retransmission
To configure link-state adv ertisement (LSA) retransmission packet pacing, use the timers pacing retransmission command in router configuration mode. To restore the default retransmission packet pacing value, use the
no form of this command.
timerspacingretransmissionmilliseconds
notimerspacingretransmission
Syntax Description
milliseconds
The time (in milliseconds) at which LSAs in the retransmission queue are paced. The configurable range is from 5 milliseconds to 200 milliseconds. The default value is 66 milliseconds.
Command Default
66 milliseconds
Command Modes
Router configuration
Command History
Release
Modification
12.2(4)T
This command was introduced.
12.2(14)S
This command was integrated into Cisco IOS Release 12.2(14)S.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
Configuring Open Shortest Path First (OSPF) retransmission pacing timers allow you to control interpacket spacing between consecutive link-state update packets in the OSPF retransmission queue. This command allows you to control the rate at which LSA updates occur so that high CPU or buffer utilization that can occur when an area is flooded with a very large number of LSAs can be reduced. The default settings for OSPF packet retransmission pacing timers are suitable for the majority of OSPF deployments. Do not change the packet retransmission pacing timers unless all other options to meet OSPF packet flooding requirements have been exhausted. Specifically, network operators should prefer summarization, stub area usage, queue tuning, and buffer tuning before changing the default flooding timers. Furthermore, there are no guidelines for changing timer values; each OSPF deployment is unique and should be considered on a case-by-case basis. The network operator assumes risks associated with changing the default packet retransmission pacing timer values.
Examples
The following example configures LSA flood pacing updates to occur in 55-millisecond intervals for OSPF routing process 1:
Displays general information about OSPF routing processes.
timerspacingflood
Configures LSA flood packet pacing.
timerspacinglsa-group
Changes the interval at which OSPF LSAs are collected into a group and refreshed, checksummed, or aged.
timers throttle lsa all
To set rate-limiting values for all types of
Open Shortest Path First (OSPF) link-state advertisement (LSA) generation, use the timersthrottlelsaallcommand in router configuration mode. To restore the default values, use the no form of this command.
Minimum delay in milliseconds for the generation of LSAs. The first instance of LSA is always generated immediately upon a local OSPF topology change. The generation of the next LSA is not before the start interval. The range is 0 to 600,000 milliseconds. The default is 0 milliseconds, which means no delay; the LSA is sent immediately.
hold-interval
Incremental time in milliseconds. This value is used to calculate the subsequent rate limiting times for LSA generation. The range is 1 to 600,000 milliseconds. The default value is 5000 milliseconds.
max-interval
Maximum wait time in milliseconds between generation of the same LSA. The range is 1 to 600,000 milliseconds. The default value is 5000 milliseconds.
This command was integrated into Cisco IOS Release 12.3(2)T.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
Usage Guidelines
The “same LSA” is defined as an LSA instance that contains the same LSA ID number, LSA type, and advertising router ID. We suggest you keep the millisecondsvalue of thetimerslsaarrivalcommand less than or equal to the hold-interval value of the timersthrottlelsaall command.
Examples
This example customizes OSPF LSA throttling so that the start interval is 200 milliseconds, the hold interval is 10,000 milliseconds, and the maximum interval is 45,000 milliseconds. The minimum interval between instances of receiving the same LSA is 2000 milliseconds.
router ospf 1
log-adjacency-changes
timers throttle lsa all 200 10000 45000
timers lsa arrival 2000
network 10.10.4.0 0.0.0.255 area 24
network 10.10.24.0 0.0.0.255 area 24
Related Commands
Command
Description
showipospf
Displays information about OSPF routing processes.
timerslsaarrival
Sets the minimum interval at which the software accepts the same LSA from OSPF neighbors.
timers throttle spf
To turn on Open Shortest Path First ( OSPF) shortest path first (SPF) throttling, use the
timersthrottlespf command in the appropriate configuration mode. To turn off OSPF SPF throttling, use the
no form of this command.
timersthrottlespfspf-startspf-holdspf-max-wait
notimersthrottlespfspf-startspf-holdspf-max-wait
Syntax Description
spf-start
Initial delay to schedule an SPF calculation after a change, in milliseconds. Range is from 1 to 600000. In OSPF for IPv6, the default value is 5000.
spf-hold
Minimum hold time between two consecutive SPF calculations, in milliseconds. Range is from 1 to 600000. In OSPF for IPv6, the default value is 10,000.
spf-max-wait
Maximum wait time between two consecutive SPF calculations, in milliseconds. Range is from 1 to 600000. In OSPF for IPv6, the default value is 10,000.
Command Default
SPF throttling is not set.
Command Modes
Address family configuration (config-router-af) Router address family topology configuration (config-router-af-topology) Router configuration (config-router) OSPF for IPv6 router configuration (config-rtr)
Command History
Release
Modification
12.2(14)S
This command was introduced. This command replaces the
timersspf-interval command.
12.0(23)S
This command was integrated into Cisco IOS Release 12.0(23)S.
12.2(15)T
This command was integrated into Cisco IOS Release 12.2(15)T.
12.2(33)SRA
This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2(33)SRB
This command was made available in router address family configuration mode.
12.2SX
This command is supported in the Cisco IOS Release 12.2SX train. Support in a specific 12.2SX release of this train depends on your feature set, platform, and platform hardware.
12.2(33)SRC
Support for IPv6 was added.
12.2(33)SB
Support for IPv6 was added and this command was integrated into Cisco IOS Release 12.2(33)SB.
Cisco IOS XE Release 2.1
This command was introduced on Cisco ASR 1000 Series Routers.
15.0(1)M
This command was integrated into Cisco IOS Release 12.5(1)M.
12.2(33)XNE
This command was modified. It was integrated into Cisco IOS Release 12.2(33)XNE.
15.1(1)SY
This command was integrated into Cisco IOS Release 15.1(1)SY.
Usage Guidelines
The first wait interval between SPF calculations is the amount of time in milliseconds specified by the
spf-startargument. Each consecutive wait interval is two times the current hold level in milliseconds until the wait time reaches the maximum time in milliseconds as specified by the
spf-max-wait argument. Subsequent wait times remain at the maximum until the values are reset or a link-state advertisement (LSA) is received between SPF calculations.
Release 12.2(33)SRB
If you plan to configure the Multi-Topology Routing (MTR) feature, you need to enter the
timersthrottlespf command in router address family topology configuration mode in order to make this OSPF router configuration command become topology-aware.
Release 15.2(1)T
When you configure the
ospfv3networkmanet command on any interface attached to the OSPFv3 process, the default values for the
spf-start,
spf-hold, and the
spf-max-wait arguments are reduced to 1000 milliseconds, 1000 milliseconds, and 2000 milliseconds respectively.
Examples
The following example shows how to configure a router with the delay, hold, and maximum interval values for the
timersthrottlespf command set at 5, 1000, and 90,000 milliseconds, respectively.
The following example shows how to configure a router using IPv6 with the delay, hold, and maximum interval values for the
timersthrottlespf command set at 500, 1000, and 10,000 milliseconds, respectively.
Sets the network type to Mobile Ad Hoc Network (MANET).
ttl-security all-interfaces
To enable Time-to-Live (TTL) security check on all OSPF interfaces, use the
ttl-securityall-interfacescommand in interface configuration mode. To disable TTL security check, use the
noform of this command.
ttl-securityall-interfaces
[ hopshop-count ]
nottl-securityall-interfaces
Syntax Description
hopshop-count
(Optional) Configures the maximum number of IP hops allowed. The
hop-countargument range is from 1 to 254.
Command Default
TTL security check is disabled on OSPF interfaces.
Command Modes
Interface configuration (config-if)
Command History
Release
Modification
12.2(33)SRC
This command was introduced.
15.0(1)M
This command was integrated into Cisco IOS Release 15.0(1)M.
Usage Guidelines
Use the
ttl-securityall-interfaces command to enable TTL security check on all OSPF interfaces.
This command applies only to normal OSPF interfaces. It does not apply to virtual or sham links that require TTL security protection. Virtual and sham links must be configured independently.
As a convenience, this command can be used to globally enable TTL security check on all OSPF interfaces. Then the
ipospfttl-securitydisablecommandininterface configuration mode can be used to disable TTL security on an interface-by-interface basis.
Examples
The following example shows how to enable TTL security check on all OSPF interfaces: