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show cef nsf
To show the current Cisco nonstop forwarding (NSF) state of Cisco Express Forwarding on both the active and standby Route Processors (RPs), use the s how cef nsfcommand in privileged EXEC mode.
Command History
Release
Modification
12.0(22)S
This command was introduced.
12.2(18)S
This command was integrated into Cisco IOS Release 12.2(18)S.
12.2(20)S
Support for the Cisco 7304 router was added.
12.2(28)SB
This command was integrated into Cisco IOS Release 12.2(28)SB.
Command History
Usage Guidelines
If you enter the show cef nsf command before a switchover occurs, no switchover activity is reported. After a switchover occurs, you can enter the show cef nsf command to display details about the switchover as reported by the newly active RP. On the Cisco 12000 and 7500 series Internet routers, details about line card switchover are also provided.
Examples
The following example shows the current NSF state:
Router# show cef nsf Last switchover occurred: 00:01:30.088 ago Routing convergence duration: 00:00:34.728 FIB stale entry purge durations:00:00:01.728 - Default 00:00:00.088 - Red Switchover Slot Count Type Quiesce Period 1 2 sso 00:00:00.108 2 1 rpr+ 00:00:00.948 3 2 sso 00:00:00.152 5 2 sso 00:00:00.092 6 1 rpr+ 00:00:00.632 No NSF stats available for the following linecards:4 7The table below describes the significant fields shown in the display.
Table 1 show cef nsf Field Descriptions Field
Description
Last switchover occurred
Time since the last system switchover.
Routing convergence duration
Time taken after the switchover before the routing protocol signaled Cisco Express Forwarding that they had converged.
Stale entry purge
Time taken by Cisco Express Forwarding to purge any stale entries in each FIB table. In the example, these are the FIB tables names “Default” and “Red.”
Switchover
Per-line card NSF statistics.
Slot
Line card slot number.
Count
Number of times the line card has switched over. This value will always be 1, unless the type is SSO.
Type
Type of switchover the line card performed last. The type can be SSO, RPR+ or RPR.
Quiesce Period
Period of time when the line card was disconnected from the switching fabric. During this time, no packet forwarding can take place.
Other system restart requirements may add additional delay until the line card can start forwarding packets.
show cef state
To display the state of Cisco Express Forwarding on a networking device, use the show cef statecommand in privileged EXEC mode.
Command History
Release
Modification
12.0(22)S
This command was introduced on Cisco 7500, 10000, and 12000 series Internet routers.
12.2(18)S
This command was integrated into Cisco IOS Release 12.2(18)S on Cisco 7500 series routers.
12.2(20)S
Support for the Cisco 7304 router was added. The Cisco 7500 series router is not supported in Cisco IOS Release 12.2(20)S.
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.
12.2(33)SXH
This command was integrated into Cisco IOS Release 12.2(33)SXH.
12.4(20)T
This command was integrated into Cisco IOS Release 12.4(20)T.
Examples
Example for Cisco IOS Releases 12.2(25)S, 12.2(28)SB, 12,2(33)SRA, 12,2(33)SXH, 12.4(20T, and Later Releases
The following example shows the state of Cisco Express Forwarding on the active Route Processor (RP):
Router# show cef state CEF Status: RP instance common CEF enabled IPv4 CEF Status: CEF enabled/running dCEF disabled/not running CEF switching enabled/running universal per-destination load sharing algorithm, id A189DD49 IPv6 CEF Status: CEF enabled/running dCEF disabled/not running original per-destination load sharing algorithm, id A189DD49The table below describes the significant fields shown in the display.
Table 2 show cef state Field Description (New) Field
Description
RP instance
Cisco Express Forwarding status is for the RP.
common CEF enabled
Common Cisco Express Forwarding is enabled.
IPv4 CEF Status
Cisco Express Forwarding mode and status is for IPv4.
universal per-destination load sharing algorithm
IPv4 is using the universal per-destination load sharing algorithm for Cisco Express Forwarding traffic.
IPv6 CEF Status
Cisco Express Forwarding mode and status is for IPV6.
original per-destination load sharing algorithm
IPv6 is using the original per-destination load sharing algorithm for Cisco Express Forwarding traffic.
Examples
Example for Cisco IOS Releases Before Cisco IOS 12.2(25)S
The following example shows the state of Cisco Express Forwarding on the active Route Processor (RP):
Router# show cef state RRP state: I am standby RRP: no RF Peer Presence: yes RF PeerComm reached: yes Redundancy mode: SSO(7) CEF NSF: enabled/runningThe table below describes the significant fields shown in the display.
Table 3 show cef state Field Descriptions Field
Description
I am standby RRP: no
This RP is not the standby.
RF Peer Presence: yes
This RP does have RF peer presence.
RF PeerComm reached: yes
This RP has reached RF peer communication.
Redundancy mode: SSO(&)
Type of redundancy mode on this RP.
CEF NSF: enabled/running
States whether Cisco Express Forwarding nonstop forwarding (NSF) is running or not.
The following example shows the state of Cisco Express Forwarding on the standby RP:
Router# show cef state RRP state: I am standby RRP: yes My logical slot: 0 RF Peer Presence: yes RF PeerComm reached: yes CEF NSF: runningshow ip ospf nsf
To display IP Open Shortest Path First (OSPF) nonstop forwarding (NSF) state information, use the show ip ospf nsf command in user EXEC or privileged EXEC mode.
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 show ip ospf nsfcommand. The fields are self-explanatory.
Router# show ip ospf nsf 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 runningvrrp sso
To enable Virtual Router Redundancy Protocol (VRRP) support of Stateful Switchover (SSO) if it has been disabled, use the vrrp sso command in global configuration mode. To disable VRRP support of SSO, use the no form of this command.
Usage Guidelines
Use this command to enable VRRP support of SSO if it has been manually disabled by the no vrrp sso command.