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rif validate-enable-route-cache
show interfaces tokenring (IBM)
spanning-tree portfast (interface mode)
rif
To enter static source-route information into the Routing Information Field (RIF) cache, use the rif command in global configuration mode. To remove an entry from the cache, use the no form of this command.
rif mac-address rif-string {interface-name | ring-group ring}
no rif mac-address rif-string {interface-name | ring-group ring}
Syntax Description
Usage Guidelines
If a Token Ring host does not support the use of IEEE 802.2 TEST or XID datagrams as explorer packets, you may need to add static information to the RIF cache of the router.
Command Default
No static source-route information is entered.
Command Modes
Global configuration
Command History
Usage Guidelines
You must specify either an interface name or a ring group number to indicate the origin of the RIF. You specify an interface name (for example, tokenring 0) with the interface-name argument, and you specify a ring group number with the ring-group ring keyword and argument. The ring group number must match the number you specified with the source-bridge ring-group command. Ring groups are explained in the "Configuring Source-Route Bridging" chapter of the Bridging and IBM Networking Configuration Guide.
Using the command rif mac-address without any other arguments puts an entry into the RIF cache indicating that packets for this MAC address should not have RIF information.
Do not configure a static RIF with any of the all rings type codes. Doing so causes traffic for the configured host to appear on more than one ring and leads to unnecessary congestion.
Note
Input to the source-bridge interface configuration command is in decimal format. RIF displays and input are in hexadecimal format, and IBM source-route bridges use hexadecimal for input. It is essential that bridge and ring numbers are consistent for proper network operation. This means you must explicitly declare the numbers to be hexadecimal by preceding the number with 0x, or you must convert IBM hexadecimal numbers to a decimal equivalent when entering them. For example, IBM hexadecimal bridge number 10 would be entered as hexadecimal number 0x10 or decimal number 16 in the configuration commands. In the displays, these commands always will be in decimal.
Examples
The following example configuration sets up a static RIF:
! insert entry with MAC address 1000.5A12.3456 and RIF of! 0630.0081.0090 into RIF cacherif 1000.5A12.3456 0630.0081.0090 tokenring 0Related Commands
multiring
Enables collection and use of RIF information.
source-bridge ring-group
Defines or removes a ring group from the configuration.
rif timeout
To determine the number of minutes an inactive Routing Information Field (RIF) entry is kept, use the rif timeout command in global configuration mode. To restore the default, use the no form of this command.
rif timeout minutes
no rif timeout
Syntax Description
minutes
Number of minutes an inactive RIF entry is kept. The value must be greater than 0. Default is 15 minutes.
Defaults
15 minutes
Command Modes
Global configuration
Command History
Usage Guidelines
A RIF entry is cached based on the MAC address and the interface.
RIF information is maintained in a cache whose entries are aged. A RIF entry can be aged out even if there is active traffic, but the traffic is fast or autonomously switched. Until a RIF entry is removed from the cache, no new information is accepted for that RIF entry.
A RIF entry is refreshed only if a RIF field of an incoming frame is identical to the RIF information of the RIF entry in the cache.
Examples
The following example changes the timeout period to 5 minutes:
rif timeout 5Related Commands
rif validate-age
To define the validation time when the Cisco IOS software is acting as a proxy for NetBIOS NAME_QUERY packet or for explorer frames, use the rif validate-age command in global configuration mode.
rif validate-age seconds
no rif validate-age seconds
Syntax Description
seconds
Interval, in seconds, at which a proxy is sent. The valid range is any number greater than 0. Default is 2 seconds.
Defaults
2 seconds
Command Modes
Global configuration
Command History
Usage Guidelines
If the timer expires before the response is received, the Routing Information Field (RIF) entry or the NetBIOS cache entry is marked as invalid and is flushed from the cache table when another explorer or NAME_QUERY packet is received.
Examples
The following example specifies the interval at which a proxy is sent to be 3 seconds:
rif validate-age 3Related Commands
rif
Enters static source-route information into the RIF cache.
rif timeout
Determines the number of minutes an inactive RIF entry is kept.
rif validate-enable
To enable Routing Information Field (RIF) validation for entries learned on an interface (Token Ring or Fiber Distributed Data Interface [FDDI]), use the rif validate-enable command in global configuration mode. To disable the specification, use the no form of this command.
rif validate-enable
no rif validate-enable
Syntax Description
This command has no arguments or keywords.
Defaults
RIF validation is enabled.
Command Modes
Global configuration
Command History
Usage Guidelines
A RIF validation algorithm is used for the following cases:
•
•
A directed IEEE TEST command is sent to the destination MAC address. If a response received in the time specified by the rif validate-age command, the entry is refreshed and is considered valid. Otherwise, the entry is removed from the cache. To prevent sending too many TEST commands, any entry that has been refreshed in fewer than 70 seconds is considered valid.
Validation is triggered as follows:
•
•
•
Note
Note
Examples
The following example enables RIF validation:
rif validate-enableRelated Commands
rif validate-enable-age
To enable Routing Information Field (RIF) validation for stations on a source-route bridge network that do not respond to an IEEE TEST command, use the rif validate-enable-age command in global configuration mode. To disable the specification, use the no form of this command.
rif validate-enable-age
no rif validate-enable-age
Syntax Description
This command has no arguments or keywords.
Defaults
RIF validation is enabled.
Command Modes
Global configuration
Command History
Usage Guidelines
You must first issue the rif validate-enable command.
When this command is enabled, a RIF entry is not removed from the cache even if it becomes invalid. If the entry is refreshed, it becomes valid again.
If a RIF field of an incoming frame and the RIF information of the invalid RIF entry are not identical, the old RIF information is replaced by the new information.
Note
Examples
The following example enables RIF validation:
rif validate-enable-ageRelated Commands
rif validate-enable
Enables RIF validation for entries learned on an interface (Token Ring or FDDI).
rif validate-enable-route-cache
To enable synchronization of the Routing Information Field (RIF) cache with the protocol route cache, use the rif validate-enable-route-cache command in global configuration mode. To disable the specification, use the no form of this command.
rif validate-enable-route-cache
no rif validate-enable-route-cache
Syntax Description
This command has no arguments or keywords.
Defaults
Disabled
Command Modes
Global configuration
Command History
Usage Guidelines
When a RIF entry is removed from the RIF cache, or the RIF information in the RIF entry is changed, the protocol route caches are synchronized with the RIF cache.
Note
Examples
The following example synchronizes the RIF cache with the protocol route cache:
rif validate-enable-route-cacheRelated Commands
rif validate-enable
Enables RIF validation for entries learned on an interface (Token Ring or FDDI).
show access-expression
To display the defined input and output access list expressions, use the show access-expression command in privileged EXEC mode.
show access-expression [begin | include | exclude]
Syntax Description
begin
(Optional) Begin with the access list expression that matches.
include
(Optional) Include access list expressions that match.
exclude
(Optional) Exclude access list expressions that match.
Defaults
Displays all input and output access list expressions.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show access-expression command:
Router# show access-expressionRouter# interface TokenRing0/0:Input:(dmac(701) | ~lsap(202))See the access-expression command for a description of the access expressions.
Related Commands
show bridge
To display classes of entries in the bridge forwarding database, use the show bridge command in privileged EXEC mode.
show bridge [bridge-group] [interface] [address [mask]] [verbose]
Syntax Description
Command Modes
Privileged EXEC
Command History
Usage Guidelines
This command first appeared in Cisco IOS Release 10.0. The verbose keyword first appeared in
Cisco IOS Release 11.0.The following are possible variations of the show bridge command:
show bridge ethernet 0show bridge 0000.0c00.0000 0000.00FF.FFFFshow bridge 0000.0c00.0e1ashow bridgeshow bridge verboseIn the sample output, the first command would display all entries for hosts reachable via Ethernet interface 0, the second command would display all entries with the vendor code of 0000.0c00.0000, and the third command would display the entry for address 0000.0c00.0e1a. In the fourth command, all entries in the forwarding database would be displayed. The fifth command provides additional detail. In all five lines, the bridge group number has been omitted.
Examples
The following is sample output from the show bridge command. The second display is output from the
show bridge command with the verbose argument.Router# show bridgeTotal of 300 station blocks, 280 freeCodes: P - permanent, S - selfBridge Group 32:Bridge Group 32:Address Action Interface Age RX count TX count0180.c200.0000 receive - S 0 0ffff.ffff.ffff receive - S 0 00900.2b01.0001 receive - S 0 00300.0c00.0001 receive - S 0 00000.0c05.1000 forward Ethernet0/1 4 1 00000.0c04.4b5b receive - S 0 00000.0c04.4b5e receive - S 0 00000.0c04.4b5d receive - S 0 00000.0c04.4b5c receive - S 0 00000.0c05.4a62 forward Ethernet0/1 4 1 0aa00.0400.2108 forward Ethernet0/1 0 42 00000.0c12.b888 forward Ethernet0/2 4 1 00000.0c12.b886 forward Ethernet0/1 4 1 0aa00.0400.4d09 forward Ethernet0/1 4 1 00000.0c06.fb9a forward Ethernet0/1 4 1 00000.0c04.b039 forward Ethernet0/1 4 1 0Router# show bridge verboseTotal of 300 station blocks, 287 freeCodes: P - permanent, S - selfBG Hash Address Action Interface DLCI Age RX count TX count32 00/0 0180.c200.0000 receive - - S 0 032 00/1 ffff.ffff.ffff receive - - S 0 032 01/0 0900.2b01.0001 receive - - S 0 032 01/1 0300.0c00.0001 receive - - S 0 032 10/0 0000.0c04.4b5b receive - - S 0 032 15/0 0000.0c04.4b5e receive - - S 0 032 16/0 0000.0c04.4b5d receive - - S 0 032 17/0 0000.0c04.4b5c receive - - S 0 032 29/0 aa00.0400.2108 forward Ethernet0/1 - 0 48 032 30/0 0000.0c12.b888 forward Ethernet0/2 - 0 1 032 A4/0 0800.2002.ff5b forward Ethernet0/1 - 0 6 032 E2/0 aa00.0400.e90b forward Ethernet0/1 - 0 65 032 F2/0 0000.0c04.b042 forward Ethernet0/2 - 3 2 0Table 14 describes the significant fields shown in the display.
show bridge circuit-group
To display the interfaces configured in each circuit group and show whether they are currently participating in load distribution, use the show bridge circuit-group command in user EXEC or privileged EXEC mode.
show bridge [bridge-group] circuit-group [circuit-group] [src-mac-address] [dst-mac-address]
Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Examples
The following is sample output from various show bridge circuit-group command strings:
Router# show bridge circuit-groupBridge group 1 Circuit group 1:Interface Serial0 : inserted, learning, forwardingInterface Serial3 : inserted, learning, forwardingBridge group 1 Circuit group 2:Interface Serial2 : inserted, learning, forwardingRouter# show bridge 1 circuit-group 1Bridge group 1 Circuit group 1:Interface Serial0 : inserted, learning, forwardingInterface Serial3 : inserted, learning, forwardingRouter# show bridge 1 circuit-group 2Bridge group 1 Circuit group 2:Interface Serial2 : inserted, learning, forwardingRouter# show bridge 1 circuit-group 1 0000.6502.23EA 0000.1234.4567Output circuit group interface is Serial3Router# show bridge 1 circuit-group 1 0000.6502.23EA%Destination MAC address requiredRouter# show bridge 1 circuit-group 1Bridge group 1 Circuit group 1:Transmission pause interval is 250msOutput interface selection is source-basedInterface Serial0 : inserted, learning, forwardingInterface Serial3 : inserted, learning, forwardingInterface Serial2 is unavailableRouter# show bridge 1 circuit-group 1 0000.6502.23EA 0000.1234.4567%Please enter source MAC address onlyTable 15 describes the significant fields shown in the display.
show bridge group
To display the status of each bridge group, use the show bridge group command in privileged EXEC mode.
show bridge group [verbose]
Syntax Description
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show bridge group command:
Router# show bridge groupBridge Group 1 is running the DEC compatible Spanning Tree ProtocolPort 7 (ATM0.1 LANE Ethernet) of bridge group 1 is downPort 4 (TokenRing0) of bridge group 1 is forwarding"Forwarding" and "down" indicate the port state as determined by the spanning-tree algorithm or via configuration.
The following examples are for bridge group 30 and bridge group 40 of a PA-12E/2FE port adapter in slot 3:
Router# show bridge groupBridge Group 30 is running the IEEE compatible Spanning Tree ProtocolPort 19 (Fast Ethernet3/0) of bridge group 30 is forwardingPort 20 (Fast Ethernet3/1) of bridge group 30 is forwardingPort 21 (Ethernet3/2) of bridge group 30 is forwardingPort 22 (Ethernet3/3) of bridge group 30 is forwardingPort 23 (Ethernet3/4) of bridge group 30 is forwardingPort 24 (Ethernet3/5) of bridge group 30 is forwardingPort 25 (Ethernet3/6) of bridge group 30 is forwardingBridge Group 40 is running the IEEE compatible Spanning Tree ProtocolPort 26 (Ethernet3/7) of bridge group 40 is downPort 27 (Ethernet3/8) of bridge group 40 is downPort 28 (Ethernet3/9) of bridge group 40 is downPort 29 (Ethernet3/10) of bridge group 40 is downPort 30 (Ethernet3/11) of bridge group 40 is downPort 31 (Ethernet3/12) of bridge group 40 is downPort 32 (Ethernet3/13) of bridge group 40 is downshow bridge multicast
To display transparent bridging multicast state information, use the show bridge multicast command in user EXEC or privileged EXEC mode.
show bridge [bridge-group] multicast [router-ports | groups] [group-address]
Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Examples
The following is sample output from the show bridge multicast command:
Router# show bridge multicastMulticast router ports for bridge group 1:2 multicast router portsFddi2/0 REthernet0/4 RMulticast groups for bridge group 1:235.145.145.223 RX count TX countFddi2/0 R 0 2Ethernet0/4 R 0 3Ethernet0/3 G 1 0235.5.5.5 RX count TX countFddi2/0 R 0 2Ethernet0/4 R 0 3Ethernet0/3 G 1 0235.4.4.4 RX count TX countFddi2/0 R 0 2Ethernet0/4 R 0 3Ethernet0/3 G 1 0Table 16 describes the significant fields shown in the display.
show bridge vlan
To display virtual LAN subinterfaces, use the show bridge vlan command in privileged EXEC mode.
show bridge vlan
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show bridge vlan command:
Router# show bridge vlanBridge Group: 50Virtual LAN Trunking Interface(s): vLAN Protocol: vLAN ID: StateFddi2/0.1000 IEEE 802.10 1000 forwardingFast Ethernet4/0.500 Inter Switch Link 500 listeningVirtual LAN Native Interface(s): StateEthernet0/1 forwardingSerial1/1 downTable 17 describes the fields shown in the display.
show controllers token (IBM)
To display information about memory management, error counters, and the board itself, use the show controllers token command in privileged EXEC mode.
show controllers token
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
Depending on the board being used, the output from the show controllers token command can vary. The show controllers token command also displays proprietary information. Thus, the information that the show controllers token command displays is of primary use to Cisco Systems technical personnel. Information that is useful to users can be obtained with the show interfaces tokenring command, described later.
Examples
The following is sample output from the show controllers token command of a CSC-IR or CSC-2R card:
Router#show controllers tokenTR Unit 0 is board 0 - ring 0state 3, dev blk: 0x1D2EBC, mailbox: 0x2100010, sca: 0x2010000current address: 0000.3080.6f40, burned in address: 0000.3080.6f40current TX ptr: 0xBA8, current RX ptr: 0x800Last Ring Status: noneStats: soft:0/0, hard:0/0, sig loss:0/0tx beacon: 0/0, wire fault 0/0, recovery: 0/0only station: 0/0, remote removal: 0/0Bridge: local 3330, bnum 1, target 3583max_hops 7, target idb: 0x0, not localInterface failures: 0 -- Bkgnd Ints: 0TX shorts 0, TX giants 0Monitor state: (active)flags 0xC0, state 0x0, test 0x0, code 0x0, reason 0x0f/w ver: 1.0, chip f/w: '000000.ME31100', [bridge capable]SMT form of this command s: 1.01 kernel, 4.02 fastmacring mode: F00, internal enables: SRB REM RPS CRS/NetMgrinternal functional: 0000011A (0000011A), group: 00000000 (00000000)if_state: 1, ints: 0/0, ghosts: 0/0, bad_states: 0/0t2m fifo purges: 0/0t2m fifo current: 0, t2m fifo max: 0/0, proto_errs: 0/0ring: 3330, bridge num: 1, target: 3583, max hops: 7Packet counts:receive total: 298/6197, small: 298/6197, large 0/0runts: 0/0, giants: 0/0local: 298/6197, bridged: 0/0, promis: 0/0bad rif: 0/0, multiframe: 0/0ring num mismatch 0/0, spanning violations 0transmit total: 1/25, small: 1/25, large 0/0runts: 0/0, giants: 0/0, errors 0/0bad fs: 0/0, bad ac: 0congested: 0/0, not present: 0/0Unexpected interrupts: 0/0, last unexp. int: 0Internal controller counts:line errors: 0/0, internal errors: 0/0burst errors: 0/0, ari/fci errors: 0/0abort errors: 0/0, lost frame: 0/0copy errors: 0/0, rcvr congestion: 0/0token errors: 0/0, frequency errors: 0/0dma bus errors: -/-, dma parity errors: -/-Internal controller smt state:Adapter MAC: 0000.3080.6f40, Physical drop: 00000000NAUN Address: 0000.a6e0.11a6, NAUN drop: 00000000Last source: 0000.a6e0.11a6, Last poll: 0000.3080.6f40Last MVID: 0006, Last attn code: 0006Txmit priority: 0006, Auth Class: 7FFFMonitor Error: 0000, Interface Errors: FFFFCorrelator: 0000, Soft Error Timer: 00C8Local Ring: 0000, Ring Status: 0000Beacon rcv type: 0000, Beacon txmit type: 0000Beacon type: 0000, Beacon NAUN: 0000.a6e0.11a6Table 18, Part 1 describes the fields shown in the first line of sample output.
In the following line, state 3 indicates the state of the board. The rest of this output line displays memory mapping that is of primary use to Cisco engineers.
state 3, dev blk: 0x1D2EBC, mailbox: 0x2100010, sca: 0x2010000The following line also appears in show interface token output as the address and burned-in address (bia), respectively:
current address: 0000.3080.6f40, burned in address: 0000.3080.6f40The following line displays buffer management pointers that change by board:
current TX ptr: 0xBA8, current RX ptr: 0x800The following line indicates the ring status from the controller chipset. This information is used by LAN Network Manager:
Last Ring Status: noneThe following line displays Token Ring statistics. See the Token Ring specification for more information:
Stats: soft:0/0, hard:0/0, sig loss:0/0tx beacon: 0/0, wire fault 0/0, recovery: 0/0only station: 0/0, remote removal: 0/0The following line indicates that Token Ring communication has been enabled on the interface. If this line of output appears, the message "Source Route Bridge capable" should appear in the show interfaces tokenring display.
Bridge: local 3330, bnum 1, target 3583Table 18, Part 2 describes the fields shown in the following line of sample output:
max_hops 7, target idb: 0x0, not local
The following line is specific to the hardware:
Interface failures: 0 -- Bkgnd Ints: 0In the following line, transmit (TX) shorts are the number of packets the interface sends that are discarded because they are smaller than the medium's minimum packet size. TX giants are the number of packets the interface sends that are discarded because they exceed the medium's maximum packet size.
TX shorts 0, TX giants 0The following line indicates the state of the controller. Possible values are active, failure, inactive, and reset.
Monitor state: (active)The following line displays detailed information relating to the monitor state shown in the previous line of output. This information relates to the firmware on the controller. This information is relevant to Cisco engineers only if the monitor state is something other than active.
flags 0xC0, state 0x0, test 0x0, code 0x0, reason 0x0Table 18, Part 3 describes the fields in the following line of output:
f/w ver: 1.0 expr 0, chip f/w: '000000.ME31100', [bridge capable]
The following line displays the version numbers for the kernel and the accelerator microcode of the Madge firmware on the board; this firmware is the Logical Link Control (LLC) interface to the chipset:
SMT form of this command s: 1.01 kernel, 4.02 fastmacThe following line displays LAN Network Manager information that relates to ring status:
ring mode: F00, internal enables: SRB REM RPS CRS/NetMgrThe following line corresponds to the functional address and the group address shown in show interfaces tokenring output:
internal functional: 0000011A (0000011A), group: 00000000 (00000000)The following line displays interface board state information that is proprietary:
if_state: 1, ints: 0/0, ghosts: 0/0, bad_states: 0/0The following lines display information that is proprietary. Our engineers use this information for debugging purposes:
t2m fifo purges: 0/0t2m fifo current: 0, t2m fifo max: 0/0, proto_errs: 0/0Each of the fields in the following line maps to a field in the show source bridge display, as follows: ring maps to srn; bridge num maps to bn; target maps to trn; and max hops maps to max:
ring: 3330, bridge num: 1, target: 3583, max hops: 7In the following lines of output, the number preceding the slash (/) indicates the count since the value was last displayed; the number following the slash (/) indicates the count since the system was last booted:
Packet counts:receive total: 298/6197, small: 298/6197, large 0/0In the following line, the number preceding the slash (/) indicates the count since the value was last displayed; the number following the slash (/) indicates the count since the system was last booted. The runts and giants values that appear here correspond to the runts and giants values that appear in show interfaces tokenring output:
runts: 0/0, giants: 0/0The following lines are receiver-specific information that Cisco engineers can use for debugging purposes:
local: 298/6197, bridged: 0/0, promis: 0/0bad rif: 0/0, multiframe: 0/0ring num mismatch 0/0, spanning violations 0transmit total: 1/25, small: 1/25, large 0/0runts: 0/0, giants: 0/0, errors 0/0The following lines include very specific statistics that are not relevant in most cases, but exist for historical purposes. In particular, the internal errors, burst errors, ari/fci, abort errors, copy errors, frequency errors, dma bus errors, and dma parity errors fields are not relevant.
Internal controller counts:line errors: 0/0, internal errors: 0/0burst errors: 0/0, ari/fci errors: 0/0abort errors: 0/0, lost frame: 0/0copy errors: 0/0, rcvr congestion: 0/0token errors: 0/0, frequency errors: 0/0dma bus errors: -/-, dma parity errors: -/-The following lines are low-level Token Ring interface statistics relating to the state and status of the Token Ring with respect to all other Token Rings on the line:
Internal controller smt state:Adapter MAC: 0000.3080.6f40, Physical drop: 00000000NAUN Address: 0000.a6e0.11a6, NAUN drop: 00000000Last source: 0000.a6e0.11a6, Last poll: 0000.3080.6f40Last MVID: 0006, Last attn code: 0006Txmit priority: 0006, Auth Class: 7FFFMonitor Error: 0000, Interface Errors: FFFFCorrelator: 0000, Soft Error Timer: 00C8Local Ring: 0000, Ring Status: 0000Beacon rcv type: 0000, Beacon txmit type: 0000show drip
To display the status of the duplicate ring protocol (DRiP) database for a router or Route Switch Module (RSM), use the show drip command in privileged EXEC mode.
show drip
Syntax Descriptions
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show drip command:
Router# show dripDRIP Database for Mgmt Domain Fast Ethernet4/0--------------------------------------------------Mac Address 0010-A6AE-B440Vlan 100 Status 30 : l-active, l-config,Mac Address 0010-2F72-C800Vlan 20 Status 0C : r-active, r-config,Vlan 1003 Status 0C : r-active, r-config,Statistics:Advertisements received 126Advertisements processed 1Advertisements transmitted 131Last revision transmitted 0x84Last changed revision transmitted 0x2Related Commands
clear drip counters
Clears DRiP counters.
interface vlan
Configures a Token Ring or Ethernet interface on the RSM.
show vlans
Displays virtual LAN subinterfaces.
show interfaces crb
To display the configuration for each interface that has been configured for routing or bridging, use the show interfaces crb command in privileged EXEC mode.
show interfaces crb
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show interfaces crb command:
Router# show interfaces crbEthernet0/0Routed protocols on Ethernet0/0:appletalk decnet ip novellEthernet0/1Routed protocols on Ethernet0/1:appletalk decnet ip novellEthernet0/2Routed protocols on Ethernet0/2:appletalk ipBridged protocols on Ethernet0/2:clns decnet vines apollonovell xnsSoftware MAC address filter on Ethernet0/2Hash Len Address Matches Act Type0x00: 0 ffff.ffff.ffff 0 RCV Physical broadcast0x00: 1 ffff.ffff.ffff 0 RCV Appletalk zone0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree0x49: 0 0000.0c36.7a45 0 RCV Interface MAC address0xc0: 0 0100.0ccc.cccc 20 RCV CDP0xc2: 0 0180.c200.0000 0 RCV IEEE spanning tree0xF8: 0 0900.07ff.ffff 0 RCV Appletalk broadcastEthernet0/3Routed protocols on Ethernet0/3:appletalk ipBridged protocols on Ethernet0/3:clns decnet vines apollonovell xnsSoftware MAC address filter on Ethernet0/3Hash Len Address Matches Act Type0x00: 0 ffff.ffff.ffff 0 RCV Physical broadcast0x00: 1 ffff.ffff.ffff 0 RCV Appletalk zone0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree0x49: 0 0000.0c36.7a45 0 RCV Interface MAC address0xc0: 0 0100.0ccc.cccc 48 RCV CDP0xc2: 0 0180.c200.0000 0 RCV IEEE spanning tree0xF8: 0 0900.07ff.ffff 0 RCV Appletalk broadcastTable 19 describes the significant fields shown in the display.
show interfaces irb
To display the configuration for each interface that has been configured for integrated routing or bridging, use the show interfaces irb command in privileged EXEC mode.
show interfaces {ethernet | fastethernet} [interface | slot/port] irb
Syntax Description
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show interfaces irb command:
Router# show interfaces ethernet 2 irbEthernet 2Routed protocols on Ethernet 2:appletalk ipBridged protocols on Ethernet 2:appletalk clns decnet vinesapollo ipx xnsSoftware MAC address filter on Ethernet 2Hash Len Address Matches Act Type0x00: 0 ffff.ffff.ffff 4886 RCV Physical broadcast0x1F: 0 0060.3e2b.a221 7521 RCV Appletalk zone0x1F: 1 0060.3e2b.a221 0 RCV Bridge-group Virtual Interface0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree0x05: 0 0900.0700.00a2 0 RCV Appletalk zone0xC2: 0 0180.c200.0000 0 RCV IEEE spanning tree0xF8: 0 0900.07ff.ffff 2110 RCV Appletalk broadcastThe following example shows that IP is configured for the first PA-12E/2FE interface of the port adapter in slot 3:
Router# show interfaces fastethernet 3/0 irbFast Ethernet3/0Routed protocols on Fast Ethernet3/0:ipBridged protocols on Fast Ethernet3/0:appletalk clns decnet ipvines apollo ipx xnsSoftware MAC address filter on Ethernet3/0Hash Len Address Matches Act Type0x00: 0 ffff.ffff.ffff 0 RCV Physical broadcast0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree0xC2: 0 0180.c200.0000 0 RCV IEEE spanning tree0xC7: 0 00e0.f7a4.5130 0 RCV Interface MAC address0xC7: 1 00e0.f7a4.5130 0 RCV Bridge-group Virtual InterfaceTable 20 describes the significant fields shown in the displays.
show interfaces tokenring (IBM)
To display information about the Token Ring interface and the state of source-route bridging (SRB), use the show interfaces tokenring command in privileged EXEC mode.
show interfaces tokenring [number]
Syntax Description
number
(Optional) Interface number. If you do not provide a value, the command will display statistics for all Token Ring interfaces.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show interfaces tokenring command:
Router# show interfaces tokenringTokenRing 0 is up, line protocol is upHardware is 16/4 Token Ring, address is 5500.2000.dc27 (bia 0000.3000.072b)Internet address is 10.136.230.203, subnet mask is 255.255.255.0MTU 8136 bytes, BW 16000 Kb, DLY 630 usec, rely 255/255, load 1/255Encapsulation SNAP, loopback not set, keepalive set (10 sec)ARP type: SNAP, ARP Timeout 4:00:00Ring speed: 16 MbpsSingle ring node, Source Route Bridge capableGroup Address: 0x00000000, Functional Address: 0x60840000Last input 0:00:01, output 0:00:01, output hang neverOutput queue 0/40, 0 drops; input queue 0/75, 0 dropsFive minute input rate 0 bits/sec, 0 packets/secFive minute output rate 0 bits/sec, 0 packets/sec16339 packets input, 1496515 bytes, 0 no bufferReceived 9895 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort32648 packets output, 9738303 bytes, 0 underruns0 output errors, 0 collisions, 2 interface resets, 0 restarts5 transitionsTable 21 describes the significant fields shown in the display.
show lnm bridge
Note
To display all currently configured bridges and all parameters that are related to the bridge as a whole, not to one of its interfaces, use the show lnm bridge command in privileged EXEC mode.
show lnm bridge
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show lnm bridge command:
Router# show lnm bridgeBridge 001-2-003, Ports 0000.3000.abc4, 0000.0028.abcdActive Links: 0000.0000.0000 0000.0000.0000 0000.0000.0000 0000.0000.0000Notification: 0 min, Threshold 00.10%Table 22 describes the significant fields shown in the display.
show lnm config
Note
To display the logical configuration of all bridges configured in a router, use the show lnm config command in privileged EXEC mode. This information is needed to configure an LAN Network Manager (LNM) Management Station to communicate with a router. This is especially important when the router is configured as a multiport bridge, thus employing the concept of a virtual ring.
show lnm config
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show lnm config command for a simple two-port bridge:
Router# show lnm configBridge(s) currently configured:From ring 001, address 0000.3000.abc4Across bridge 002To ring 003, address 0000.0028.abcdThe following is sample output from the show lnm config command for a multiport bridge:
Router# show lnm configBridge(s) currently configured:From ring 001, address 0000.0028.abc4Across bridge 001To ring 008, address 4000.0028.abcdFrom ring 002, address 0000.3000.abc4Across bridge 002To ring 008, address 4000.3000.abcdFrom ring 003, address 0000.3000.5735Across bridge 003To ring 008, address 4000.3000.5735Table 23 describes the significant fields shown in the display.
show lnm interface
Note
To display all LAN Network Manager (LNM)-related information about a specific interface or all interfaces, use the show lnm interface command in privileged EXEC mode.
show lnm interface [type number]
Syntax Description
Defaults
The type argument is not specified, information about all interface types is displayed.
If number is not specified, information about all interface numbers is displayed.Command Modes
Privileged EXEC
Command History
Usage Guidelines
This command is for all types of interfaces, including Token Ring interfaces. If you want information specific to Token Ring, use the show lnm ring command.
Examples
The following is sample output from the show lnm interface command:
Router# show lnm interfacenonisolating error countsinterface ring Active Monitor SET dec lost cong. fc freq.tokenTokenRing1 0001* 1000.5a98.23a0 00200 00001 00000 00000 00000 0000000002Notification flags: FE00, Ring Intensive: FFFF, Auto Intensive: FFFFActive Servers: LRM LBS REM RPS CRSLast NNIN: never, from 0000.0000.0000.Last Claim: never, from 0000.0000.0000.Last Purge: never, from 0000.0000.0000.Last Beacon: never, 'none' from 0000.0000.0000.Last MonErr: never, 'none' from 0000.0000.0000.isolating error countsstation int ring loc. weight line inter burst ac abort1000.5a98.23a0 T1 0001 0000 00 - N00000 00000 00000 00000 000001000.5a98.239e T1 0001 0000 00 - N00000 00000 00000 00000 000001000.5a6f.bc15 T1 0001 0000 00 - N00000 00000 00000 00000 000000000.3000.abc4 T1 0001 0000 00 - N00000 00000 00000 00000 000001000.5a98.239f T1 0001 0000 00 - N00000 00000 00000 00000 00000Table 24 describes the significant fields shown in the display. See the show lnm station command for a description of the fields that follow after the "isolating error counts" line in the sample output.
Related Commands
show lnm ring
Note
To display all LAN Network Manager (LNM) information about a specific Token Ring or all Token Rings, use the show lnm ring command in privileged EXEC mode.
show lnm ring [ring-number]
Syntax Description
ring-number
(Optional) Number of a specific Token Ring. It can be a value in the range from 1 to 4095.
Defaults
If the ring-number argument is not specified, information about all Token Rings is displayed.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
If a specific interface is requested, it also displays a list of all active stations on that interface.
The output of this command is the same as the output of the show lnm interface command. See the show lnm interface and show lnm station commands for sample output and a description of the fields. The same information can be obtained by using the show lnm interface command, but instead of specifying an interface number, you specify a ring number as an argument.
Related Commands
show lnm station
Note
To display LAN Network Manager (LNM)-related information about a specific station or all known stations on all rings, use the show lnm station command in privileged EXEC mode
show lnm station [address]
Syntax Description
Command Modes
Privileged EXEC
Command History
Usage Guidelines
If a specific station is requested, it also displays a detailed list of that station's current MAC-level parameters.
Examples
The following is sample output from the show lnm station command when a particular address has been specified:
Router# show lnm station 1000.5a6f.bc15isolating error countsstation int ring loc. weight line inter burst ac abort1000.5a6f.bc15 T1 0001 0000 00 - N 00000 00000 00000 00000 00000Unique ID: 0000.0000.0000 NAUN: 0000.3000.abc4Functional: C000.0000.0000 Group: C000.0000.0000Physical Location: 00000 Enabled Classes: 0000Allowed Priority: 00000 Address Modifier: 0000Product ID: 00000000.00000000.00000000.00000000.0000Ucode Level: 00000000.00000000.0000Station Status: 00000000.0000Last transmit status: 00Table 25 describes the significant fields shown in the display.
Table 25 show lnm station Field Descriptions
station
MAC address of the given station on the Token Ring.
int
Interface used to reach the given station.
ring
Number of the Token Ring where the given station is located.
loc.
Physical location number of the given station.
weight
Weighted accumulation of the errors of the given station, and of its nearest active upstream neighbor (NAUN). The three possible letters and their meanings are as follows:1
•
•
•
isolating error counts
Current values of the five isolating error counters specified in the 802.5 specification. These are Line errors, Internal errors, Burst errors, AC errors, and Abort errors.
Unique ID:
Uniquely assigned value for this station.
NAUN:
MAC address of this station's "upstream" neighbor.
Functional:
MAC-level functional address currently in use by this station.
Group:
MAC-level group address currently in use by this station.
Physical Location:
Number assigned to this station as its "Physical Location" identifier.
Enabled Classes:
Functional classes that the station is allowed to send.
Allowed Priority:
Maximum access priority that the station may use when sending onto the Token Ring.
Address Modifier:
Reserved field.
Product ID:
Encoded 18-byte string used to identify what hardware and software combination is running on this station.
Ucode Level:
10-byte extended binary coded decimal interchange code (EBCDIC) string indicating the microcode level of the station.
Station Status:
Implementation-dependent vector that is not specified anywhere.
Last transmit status:
Contains the strip status of the last "Report Transmit Forward" MAC frame forwarded by this interface.
1 The description of these error conditions can be found in the IBM Architecture Reference Manual.
show netbios-cache
To display a list of NetBIOS cache entries, use the show netbios-cache command in privileged EXEC mode.
show netbios-cache
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show netbios-cache command:
Router# show netbios-cacheHW Addr Name How Idle NetBIOS Packet Savings1000.5a89.449a IC6W06_B TR1 6 01000.5a8b.14e5 IC_9Q07A TR1 2 01000.5a25.1b12 IC9Q19_A TR1 7 01000.5a25.1b12 IC9Q19_A TR1 10 01000.5a8c.7bb1 BKELSA1 TR1 4 01000.5a8b.6c7c ICELSB1 TR1 - 01000.5a31.df39 ICASC_01 TR1 - 01000.5ada.47af BKELSA2 TR1 10 01000.5a8f.018a ICELSC1 TR1 1 0Table 26 describes the significant fields shown in the display.
Related Commands
show pxf cpu statistics
To display parallel express forwarding (PXF) central processing unit (CPU) statistics for a configured router, use the show pxf cpu statistics command in privilege EXEC mode.
show pxf cpu statistics [crtp | diversion | drop | ip | mlp | qos | spd]
Syntax Description
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show pxf cpu statistics command for diversion statistics:
Router# show pxf cpu statistics diversionDiversion Cause Stats:local = 31dest = 0option = 0protocol = 0encap = 0oam f5 = 149oam f4 = 0atm ilmi = 0comp = 0ip_sanity = 0ip_bcast = 0ip_dest = 0fib_punt = 0mtu = 0arp = 1rarp = 0icmp = 0divert = 0no_group = 0direct = 0local_mem = 0p2p_prune = 0assert = 0dat_prune = 0join_spt = 0null_out = 0igmp = 0register = 0no_fast = 0ipc_resp = 0keepalive = 0min_mtu = 0icmp_frag = 0icmp_bad = 0mpls_ttl = 0tfib = 0multicast = 0clns_isis = 0ppp_cntrl = 0tun_norte = 0tun_nofrg = 0ctcp_in = 0vsi_sig = 8mvpn_tfrg = 0cdp = 0!IRB counterssmf_msmtch= 0irb_stp = 0brdg_ip = 0no_rt_ip = 0multi_mac = 0Related Commands
show pxf cpu subblock
To display parallel express forwarding (PXF) central processing unit (CPU) statistics for a bridged subinterface (encapsulation type), use the show pxf cpu subblock command in privileged EXEC mode.
show pxf cpu subblock interface-name
Syntax Description
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show pxf cpu subblock command, which shows the bridge-group virtual interface software MAC-address filtering (SMF) table:
Router# show pxf cpu subblock switch1.100Switch1.100 is upICB = C001, LinkId = 3, interface PXF, enabledIOS encapsulation type 33 ATM!BVI encapsulation denoted by the type.ICB: Index: 49155 Min mtu: 4 Max mtu: 4486 Encapsulation Type:8VCCI maptable location = 0x8340A800VCCImap entry: vcci: 0x5 u0 : 0x64 Max mtu : 4486Min mtu : 0x4 vc_type_flags: 0x20VCCI 0x5 seg channel id 0x1A5icmp ipaddress 10.4.4.1 timestamp 0feature_data: flags 0x0000 fib_index 0x0col_5_cicb.flags : 0x00Related Commands
show pxf cpu tbridge
To display parallel express forwarding (PXF) central processing unit (CPU) statistics for transparent bridging, use the show pxf cpu tbridge command in privileged EXEC mode.
show pxf cpu tbridge
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show pxf cpu tbridge command, which shows the bridge-group virtual interface software MAC-address filtering (SMF) table:
Router# show pxf cpu tbridgeBridge-group Virtual Interface SMF table ========================================SMF Entry Mac Address SMF MATCH BVI Flags1 0000.0000.0000 0 0x02 0000.0000.0000 0 0x03 0000.0000.0000 0 0x04 0000.0000.0000 0 0x05 0000.0000.0000 0 0x06 0000.0000.0000 0 0x07 0000.0000.0000 0 0x08 0000.0000.0000 0 0x09 0000.0000.0000 0 0x0!Entry for BVI 10.10 0000.0c09.6504 0 0x1!Bridged packets.11 0000.0000.0000 0 0x000112 0000.0000.0000 0 0x013 0000.0000.0000 0 0x014 0000.0000.0000 0 0x015 0000.0000.0000 0 0x016 0000.0000.0000 0 0x017 0000.0000.0000 0 0x0!Routed packets.18 0000.0000.0000 0 0x010019 0000.0000.0000 0 0x020 0000.0000.0000 0 0x0..Related Commands
show rif
To display the current contents of the Routing Information Field (RIF) cache, use the show rif command in privileged EXEC mode.
show rif
Syntax Description
This command has no arguments or keywords.
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show rif command:
Router# show rifCodes: * interface, - static, + remoteHardware Addr How Idle (min) Routing Information Field5C02.0001.4322 rg5 - 0630.0053.00B05A00.0000.2333 TR0 3 08B0.0101.2201.0FF05B01.0000.4444 - - -0000.1403.4800 TR1 0 -0000.2805.4C00 TR0 * -0000.2807.4C00 TR1 * -0000.28A8.4800 TR0 0 -0077.2201.0001 rg5 10 0830.0052.2201.0FF0In the display, entries marked with an asterisk (*) are the router's interface addresses. Entries marked with a dash (-) are static entries. Entries with a number denote cached entries. If the RIF timeout is set to something other than the default of 15 minutes, the timeout is displayed at the top of the display. Table 27 describes the significant fields shown in the display.
Related Commands
show source-bridge
To display the current source bridge configuration and miscellaneous statistics, use the show source-bridge command in privileged EXEC mode.
show source-bridge [interface]
Syntax Description
Command Modes
Privileged EXEC
Command History
Examples
The following is sample output from the show source-bridge command:
Router# show source-bridgeLocal Interfaces: receive transmitsrn bn trn r p s n max hops cnt cnt dropsTR0 5 1 10 * * 7 39:1002 23:62923Ring Group 10:This peer: TCP 10.136.92.92Maximum output TCP queue length, per peer: 100Peers: state lv pkts_rx pkts_tx expl_gn drops TCPTCP 10.136.92.92 - 2 0 0 0 0 0TCP 10.136.93.93 open 2* 18 18 3 0 0Rings:bn: 1 rn: 5 local ma: 4000.3080.844b TokenRing0 fwd: 18bn: 1 rn: 2 remote ma: 4000.3080.8473 TCP 10.136.93.93 fwd: 36Explorers: ------- input ------- ------- output -------spanning all-rings total spanning all-rings totalTR0 0 3 3 3 5 8The following is sample output from the show source-bridge command when Token Ring LAN emulation (LANE) is configured.
Router# show source-bridgeLocal Interfaces: receive transmitsrn bn trn r p s n max hops cnt cnt dropsAT2/0.1 2048 5 256 * f 7 7 7 5073 5072 0To3/0/0 1 1 256 * f 7 7 7 4719 4720 0Global RSRB Parameters:TCP Queue Length maximum: 100Ring Group 256:No TCP peername set, TCP transport disabledMaximum output TCP queue length, per peer: 100Rings:bn: 5 rn: 2048 local ma: 4000.0ca0.5b40 ATM2/0.1 fwd: 5181bn: 1 rn: 1 local ma: 4000.3005.da06 TokenRing3/0/0 fwd: 5180Explorers: ------- input ------- ------- output -------spanning all-rings total spanning all-rings totalAT2/0.1 9 1 10 10 0 10To3/0/0 10 0 10 9 1 10Local: fastswitched 20 flushed 0 max Bps 38400rings inputs bursts throttles output dropsTo3/0/0 10 0 0 0The following is sample output from the show source-bridge command with the interface keyword specified:
Router# show source-bridge interfacev p s n r PacketsInterface St MAC-Address srn bn trn r x p b c IP-Address In OutTo0/0 up 0000.300a.7c06 1 1 2009 * b F 10.2.0.9 63836 75413To0/1 up 0000.300a.7c86 2 1 2009 * b F 10.1.0.9 75423 63835To0/2 up 0000.300a.7c46 1001 1 2009 * b F 5845 5845Table 28 describes the significant fields shown in the displays.
show span
To display the spanning-tree topology known to the router, use the show span command in user EXEC or privileged EXEC mode.
show span
Syntax Description
This command has no arguments or keywords.
Command Modes
User EXEC
Privileged EXECCommand History
Examples
The following is sample output from the show span command:
Router# show spanBridge Group 1 is executing the IBM compatible Spanning Tree ProtocolBridge Identifier has priority 32768, address 0000.0c0c.f68bConfigured hello time 2, max age 6, forward delay 4Current root has priority 32768, address 0000.0c0c.f573Root port is 001A (TokenRing0/0), cost of root path is 16Topology change flag not set, detected flag not setTimes: hold 1, topology change 30, notification 30hello 2, max age 6, forward delay 4, aging 300Timers: hello 0, topology change 0, notification 0Port 001A (TokenRing0/0) of bridge group 1 is forwarding. Path cost 16Designated root has priority 32768, address 0000.0c0c.f573Designated bridge has priority 32768, address 0000.0c0c.f573Designated port is 001B, path cost 0, peer 0Timers: message age 1, forward delay 0, hold 0Port 002A (TokenRing0/1) of bridge group 1 is blocking. Path cost 16Designated root has priority 32768, address 0000.0c0c.f573Designated bridge has priority 32768, address 0000.0c0c.f573Designated port is 002B, path cost 0, peer 0Timers: message age 0, forward delay 0, hold 0Port 064A (spanRSRB) of bridge group 1 is disabled. Path cost 250Designated root has priority 32768, address 0000.0c0c.f573Designated bridge has priority 32768, address 0000.0c0c.f68bDesignated port is 064A, path cost 16, peer 0Timers: message age 0, forward delay 0, hold 0A port (spanRSRB) is created with each virtual ring group. The port will be disabled until one or more peers go into open state in the ring group.
show spanning-tree
To display spanning-tree information for the specified spanning-tree instances, use the show spanning-tree command in privileged EXEC mode.
Cisco 2600, 3660, and 3845 Series Switches
show spanning-tree [bridge-group] [active | backbonefast | blockedports | bridge | brief | inconsistentports | interface interface-type interface-number| root | summary [totals] | uplinkfast | vlan vlan-id]
Cisco 6500/6000 Catalyst Series Switches and Cisco 7600 Series Routers
show spanning-tree [bridge-group | active | backbonefast | bridge [id] | detail | inconsistentports | interface interface-type interface-number [portfast [edge]] | mst [list | configuration [digest]] | root | summary [totals] | uplinkfast | vlan vlan-id | port-channel number | pathcost method]
Syntax Description
Command Modes
Privileged EXEC (#)
Command History
Usage Guidelines
The keywords and arguments that are available with the show spanning-tree command vary depending on the platform you are using and the network modules that are installed and operational.
Cisco 2600, 3660, and 3845 Series Switches
The valid values for interface interface-type are:
•
•
Cisco 6500/6000 Catalyst Switches and 7600 Series Routers
The port-channel number values from 257 to 282 are supported on the Content Switching Module (CSM) and the Firewal Services Module (FWSM) only.
The interface-number argument designates the module and port number. Valid values for interface-number depend on the specified interface type and the chassis and module that are used. For example, if you specify a Gigabit Ethernet interface and have a 48-port 10/100BASE-T Ethernet module that is installed in a 13-slot chassis, valid values for the module number are from 2 to 13 and valid values for the port number are from 1 to 48.
When checking spanning tree-active states and you have a large number of VLANs, you can enter the show spanning-tree summary total command. You can display the total number of VLANs without having to scroll through the list of VLANs.
The valid values for interface interface-type are:
•
•
•
•
•
•
•
The valid values for keyword pathcoast method are:
•
•
•
•
•
•
When you run the show spanning-tree command for a VLAN or an interface the switch router will display the different port states for the VLAN or interface. The valid spanning-tree port states are listening, learning, forwarding, blocking, disabled, and loopback. See Table 29 for definitions of the port states:
Examples
Cisco 2600, 3660, and 3845 Series Switches
The following example shows that bridge group 1 is running the VLAN Bridge Spanning Tree Protocol:
Router# show spanning-tree 1Bridge group 1 is executing the VLAN Bridge compatible Spanning Tree ProtocolBridge Identifier has priority 32768, address 0000.0c37.b055Configured hello time 2, max age 30, forward delay 20We are the root of the spanning treePort Number size is 10 bitsTopology change flag not set, detected flag not setTimes: hold 1, topology change 35, notification 2hello 2, max age 30, forward delay 20Timers: hello 0, topology change 0, notification 0bridge aging time 300Port 8 (Ethernet1) of Bridge group 1 is forwardingPort path cost 100, Port priority 128Designated root has priority 32768, address 0000.0c37.b055Designated bridge has priority 32768, address 0000.0c37.b055Designated port is 8, path cost 0Timers: message age 0, forward delay 0, hold 0BPDU: sent 184, received 0The following is sample output from the show spanning-tree summary command:
Router# show spanning-tree summaryUplinkFast is disabledName Blocking Listening Learning Forwarding STP Active-------------------- -------- --------- -------- ---------- ----------VLAN1 23 0 0 1 24-------------------- -------- --------- -------- ---------- ----------1 VLAN 23 0 0 1 24Table 30 describes the significant fields shown in the display.
The following is sample output from the show spanning-tree brief command:
Router# show spanning-tree briefVLAN1Spanning tree enabled protocol IEEEROOT ID Priority 32768Address 0030.7172.66c4Hello Time 2 sec Max Age 20 sec Forward Delay 15 secVLAN1Spanning tree enabled protocol IEEEROOT ID Priority 32768Address 0030.7172.66c4Port DesignatedName Port ID Prio Cost Sts Cost Bridge ID Port ID------- ------- ---- ---- --- ---- -------------- -------Fa0/11 128.17 128 100 BLK 38 0404.0400.0001 128.17Fa0/12 128.18 128 100 BLK 38 0404.0400.0001 128.18Fa0/13 128.19 128 100 BLK 38 0404.0400.0001 128.19Fa0/14 128.20 128 100 BLK 38 0404.0400.0001 128.20Fa0/15 128.21 128 100 BLK 38 0404.0400.0001 128.21Fa0/16 128.22 128 100 BLK 38 0404.0400.0001 128.22Fa0/17 128.23 128 100 BLK 38 0404.0400.0001 128.23Fa0/18 128.24 128 100 BLK 38 0404.0400.0001 128.24Fa0/19 128.25 128 100 BLK 38 0404.0400.0001 128.25Fa0/20 128.26 128 100 BLK 38 0404.0400.0001 128.26Fa0/21 128.27 128 100 BLK 38 0404.0400.0001 128.27Port DesignatedName Port ID Prio Cost Sts Cost Bridge ID Port ID------- ------- ---- ---- --- ---- -------------- -------Fa0/22 128.28 128 100 BLK 38 0404.0400.0001 128.28Fa0/23 128.29 128 100 BLK 38 0404.0400.0001 128.29Fa0/24 128.30 128 100 BLK 38 0404.0400.0001 128.30 Hello Time 2 sec Max Age 20 sec Forward Delay 15 secTable 31 describes the significant fields shown in the display.
The following is sample output from the show spanning-tree vlan 1 command:
Router# show spanning-tree vlan 1Spanning tree 1 is executing the IEEE compatible Spanning Tree protocolBridge Identifier has priority 32768, address 00e0.1eb2.ddc0Configured hello time 2, max age 20, forward delay 15Current root has priority 32768, address 0010.0b3f.ac80Root port is 5, cost of root path is 10Topology change flag not set, detected flag not set, changes 1Times: hold 1, topology change 35, notification 2hello 2, max age 20, forward delay 15Timers: hello 0, topology change 0, notification 0Interface Fa0/1 in Spanning tree 1 is downPort path cost 100, Port priority 128Designated root has priority 32768, address 0010.0b3f.ac80Designated bridge has priority 32768, address 00e0.1eb2.ddc0Designated port is 1, path cost 10Timers: message age 0, forward delay 0, hold 0BPDU: sent 0, received 0Table 32 describes the significant fields shown in the display.
The following is sample output from the show spanning-tree interface fastethernet0/3 command:
Router# show spanning-tree interface fastethernet0/3Interface Fa0/3 (port 3) in Spanning tree 1 is downPort path cost 100, Port priority 128Designated root has priority 6000, address 0090.2bba.7a40Designated bridge has priority 32768, address 00e0.1e9f.4abfDesignated port is 3, path cost 410Timers: message age 0, forward delay 0, hold 0BPDU: sent 0, received 0Cisco 6500/6000 Series Catalyst Switches and 7600 Series Routers
This example shows how to display a summary of interface information:
Router#show spanning-treeVLAN0001Spanning tree enabled protocol ieeeRoot ID Priority 4097Address 0004.9b78.0800This bridge is the rootHello Time 2 sec Max Age 20 sec Forward Delay 15 secBridge ID Priority 4097 (priority 4096 sys-id-ext 1)Address 0004.9b78.0800Hello Time 2 sec Max Age 20 sec Forward Delay 15 secAging Time 15Interface Port ID Designated Port IDName Prio.Nbr Cost Sts Cost Bridge ID Prio.Nbr---------------- -------- --------- --- --------- -------------------- --------Gi2/1 128.65 4 LIS 0 4097 0004.9b78.0800 128.65Gi2/2 128.66 4 LIS 0 4097 0004.9b78.0800 128.66Fa4/3 128.195 19 LIS 0 4097 0004.9b78.0800 128.195Fa4/4 128.196 19 BLK 0 4097 0004.9b78.0800 128.195Router#Table 33 describes the fields that are shown in the example.
Table 33 show spanning-tree Command Output Fields
Port ID Prio.Nbr
Port ID and priority number.
Cost
Port cost.
Sts
Status information.
This example shows how to display information about the spanning tree on active interfaces only:
Router#show spanning-tree activeUplinkFast is disabledBackboneFast is disabledVLAN1 is executing the ieee compatible Spanning Tree protocolBridge Identifier has priority 32768, address 0050.3e8d.6401Configured hello time 2, max age 20, forward delay 15Current root has priority 16384, address 0060.704c.7000Root port is 265 (FastEthernet5/9), cost of root path is 38Topology change flag not set, detected flag not setNumber of topology changes 0 last change occurred 18:13:54 agoTimes: hold 1, topology change 24, notification 2hello 2, max age 14, forward delay 10Timers: hello 0, topology change 0, notification 0Router#This example shows how to display the status of spanning-tree BackboneFast:
Router# show spanning-tree backbonefastBackboneFast is enabledBackboneFast statistics-----------------------Number of transition via backboneFast (all VLANs) : 0Number of inferior BPDUs received (all VLANs) : 0Number of RLQ request PDUs received (all VLANs) : 0Number of RLQ response PDUs received (all VLANs) : 0Number of RLQ request PDUs sent (all VLANs) : 0Number of RLQ response PDUs sent (all VLANs) : 0Router#This example shows how to display information about the spanning tree for this bridge only:
Router# show spanning-tree bridgeVLAN1Bridge ID Priority 32768Address 0050.3e8d.6401Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec.Router#This example shows how to display detailed information about the interface:
Router#show spanning-tree detailVLAN1 is executing the ieee compatible Spanning Tree protocolBridge Identifier has priority 4096, address 00d0.00b8.1401Configured hello time 2, max age 20, forward delay 15We are the root of the spanning treeTopology change flag not set, detected flag not setNumber of topology changes 9 last change occurred 02:41:34 agofrom FastEthernet4/21Times: hold 1, topology change 35, notification 2hello 2, max age 20, forward delay 15Timers: hello 1, topology change 0, notification 0, aging 300Port 213 (FastEthernet4/21) of VLAN1 is forwardingPort path cost 19, Port priority 128, Port Identifier 128.213.Designated root has priority 4096, address 00d0.00b8.1401Designated bridge has priority 4096, address 00d0.00b8.1401Designated port id is 128.213, designated path cost 0Timers: message age 0, forward delay 0, hold 0Number of transitions to forwarding state: 1BPDU: sent 4845, received 1Router#This example shows how to display information about the spanning tree for a specific interface:
Router# show spanning-tree interface fastethernet 5/9Interface Fa0/10 (port 23) in Spanning tree 1 is ROOT-INCONSISTENT Port path cost 100, Port priority 128 Designated root has priority 8192, address 0090.0c71.a400 Designated bridge has priority 32768, address 00e0.1e9f.8940This example shows how to display information about the spanning tree for a specific bridge group:
Router#show spanning-tree 1UplinkFast is disabledBackboneFast is disabledBridge group 1 is executing the ieee compatible Spanning Tree protocolBridge Identifier has priority 32768, address 00d0.d39c.004dConfigured hello time 2, max age 20, forward delay 15Current root has priority 32768, address 00d0.d39b.fdddRoot port is 7 (FastEthernet2/2), cost of root path is 19Topology change flag set, detected flag not setNumber of topology changes 3 last change occurred 00:00:01 agofrom FastEthernet2/2Times: hold 1, topology change 35, notification 2hello 2, max age 20, forward delay 15Timers: hello 0, topology change 0, notification 0 bridge aging time 15Port 2 (Ethernet0/1/0) of Bridge group 1 is downPort path cost 100, Port priority 128Designated root has priority 32768, address 0050.0bab.1808Designated bridge has priority 32768, address 0050.0bab.1808Designated port is 2, path cost 0Timers: message age 0, forward delay 0, hold 0BPDU: sent 0, received 0Router#This example shows how to display a summary of port states:
Router#show spanning-tree summaryRoot bridge for: Bridge group 1, VLAN0001, VLAN0004-VLAN1005VLAN1013-VLAN1499, VLAN2001-VLAN4094EtherChannel misconfiguration guard is enabledExtended system ID is enabledPortfast is enabled by defaultPortFast BPDU Guard is disabled by defaultPortfast BPDU Filter is disabled by defaultLoopguard is disabled by defaultUplinkFast is disabledBackboneFast is disabledPathcost method used is longName Blocking Listening Learning Forwarding STP Active---------------------- -------- --------- -------- ---------- ----------1 bridge 0 0 0 1 13584 vlans 3584 0 0 7168 10752Blocking Listening Learning Forwarding STP Active---------------------- -------- --------- -------- ---------- ----------Total 3584 0 0 7169 10753Router#This example shows how to display the total lines of the spanning-tree state section:
Router#show spanning-tree summary totalRoot bridge for:Bridge group 10, VLAN1, VLAN6, VLAN1000.Extended system ID is enabled.PortFast BPDU Guard is disabledEtherChannel misconfiguration guard is enabledUplinkFast is disabledBackboneFast is disabledDefault pathcost method used is longName Blocking Listening Learning Forwarding STP Active-------------------- -------- --------- -------- ---------- ----------105 VLANs 3433 0 0 105 3538BackboneFast statistics-----------------------Number of transition via backboneFast (all VLANs) :0Number of inferior BPDUs received (all VLANs) :0Number of RLQ request PDUs received (all VLANs) :0Number of RLQ response PDUs received (all VLANs) :0Number of RLQ request PDUs sent (all VLANs) :0Number of RLQ response PDUs sent (all VLANs) :0Router#This example shows how to display information about the spanning tree for a specific VLAN:
Router#show spanning-tree vlan 200VLAN0200Spanning tree enabled protocol ieeeRoot ID Priority 32768Address 00d0.00b8.14c8This bridge is the rootHello Time 2 sec Max Age 20 sec Forward Delay 15 secBridge ID Priority 32768Address 00d0.00b8.14c8Hello Time 2 sec Max Age 20 sec Forward Delay 15 secAging Time 300Interface Role Sts Cost Prio.Nbr Status---------------- ---- --- --------- -------- --------------------------------Fa4/4 Desg FWD 200000 128.196 P2pFa4/5 Back BLK 200000 128.197 P2pRouter#Table 34 describes the fields that are shown in the example.
Table 34 show spanning-tree vlan Command Output Fields
Role
Current 802.1w role; valid values are Boun (boundary), Desg (designated), Root, Altn (alternate), and Back (backup).
Sts
Spanning-tree states; valid values are BKN* (broken)1 , BLK (blocking), DWN (down), LTN (listening), LBK (loopback), LRN (learning), and FWD (forwarding).
Cost
Port cost.
Prio.Nbr
Port ID that consists of the port priority and the port number.
Status
Status information; valid values are as follows:
•
•
•
•
•
1 For information on the *, see the definition for the Status field.
This example shows how to determine if any ports are in the root-inconsistent state:
Router#show spanning-tree inconsistentportsName Interface Inconsistency-------------------- -------------------- ------------------VLAN1 FastEthernet3/1 Root InconsistentNumber of inconsistent ports (segments) in the system :1Router#Related Commands
show spantree
To display spanning-tree information for a virtual LAN (VLAN) or port, use the show spantree command in privileged EXEC mode.
show spantree [vlan] [active]
show spantree mod/port
Syntax Description
Command Modes
Privileged EXEC
Command History
Usage Guidelines
If you do not specify the VLAN number, VLAN 1 is displayed.
If you are in Multiple Instances of Spanning Tree (MISTP) mode, instance information is not displayed.
The maximum length of the channel port list is 47. The space in the Port(s) column might not be enough to display the entire list in one line. If this is the case, the port list is split into multiple lines. For example, in the following display, ports 6/5-8, 6/13, 6/15, 6/17, 6/19 are channeling:
...Port(s) Vlan Port-State Cost Prio Portfast Channel_id------------------------ ---- ------------- --------- ---- -------- ----------6/5-8,6/13,6/15,6/17,6/1 1 not-connected 2684354 32 disabled 09...The Link Aggregation Control Protocol (LACP) for channels does not support half-duplex links. If a port is in active/passive mode and becomes half duplex, the port is suspended (and a syslog message is generated).
The port is shown as "connected" if you use the show port command and as "not connected" if you use the show spantree command. This discrepancy occurs because the port is physically connected but never joined the active spanning-tree topology. To get the port to join the active spanning- tree topology, either set the duplex to full or set the channel mode to off for that port.
Examples
The following example shows how to display the active spanning tree port configuration for VLAN 1 while in Per VLAN Spanning Tree (PVST+ mode):
Router# (enable) show spantree 1 activeVLAN 1Spanning tree mode PVST+Spanning tree type ieeeSpanning tree enabledDesignated Root 00-60-70-4c-70-00Designated Root Priority 16384Designated Root Cost 19Designated Root Port 2/3Root Max Age 14 sec Hello Time 2 sec Forward Delay 10 secBridge ID MAC ADDR 00-d0-00-4c-18-00Bridge ID Priority 32768Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 secPort Vlan Port-State Cost Prio Portfast Channel_id------------------------ ---- ------------- --------- ---- -------- ----------2/3 1 forwarding 19 32 disabled 02/12 1 forwarding 19 32 disabled 0The following example shows how to display the active spanning-tree port configuration for VLAN 1 (while in MISTP mode):
Router# (enable) show spantree 1 activeVLAN 1Spanning tree mode MISTPSpanning tree type ieeeSpanning tree enabledVLAN mapped to MISTP Instance: 1Port Vlan Port-State Cost Prio Portfast Channel_id------------------------ ---- ------------- --------- ---- -------- ----------2/3 1 forwarding 200000 32 disabled 02/12 1 forwarding 200000 32 disabled 0Table 35 describes the significant fields shown in the displays.
Related Commands
show subscriber-policy
To display the details of a subscriber policy, use the show subscriber-policy command in user EXEC or privileged EXEC mode.
show subscriber-policy range
Syntax Description
Command Modes
User EXEC
Privileged EXECCommand History
Examples
The following is sample output from the show subscriber-policy command:
Router# show subscriber-policy 1ARP: PermitBroadcast: DenyMulticast: PermitUnknown: DenySTP: DisableCDP: DisableRelated Commands
source-bridge trcrf-vlan
To attach a VLAN to the Route Switch Module (RSM)'s virtual ring when source-route bridging, use the source-bridge trcrf-vlan command in interface configuration mode. To disable the attachment of a VLAN to the RSM's virtual ring, use the no form of this command.
source-bridge trcrf-vlan vlanid ring-group ringnum
Syntax Description
vlanid
VLAN ID number.
ring-group ringnum
Pseudoring number that corresponds to the virtual ring number for the interface.
Defaults
No default behavior or values
Command Modes
Interface configuration
Command History
Usage Guidelines
Use the source-bridge ring-group command to create a virtual ring for source-route bridging (SRB) between Token Ring Bridge Relay Function (TrBRF) VLANs. Use the source-bridge trcrf-vlan command to assign a Token Ring Concentrator Relay Function (TrCRF) VLAN ID to the virtual ring.
In SRB and source-route translational bridging (SR/TLB), define a unique TrCRF VLAN ID that corresponds to the virtual ring on the RSM for each TrBRF. Although the VLAN ID for the TrCRF is unique for each TrBRF, the ring number will be the same.
If IP or IPX routing source routing (SR) frames is required on a TrBRF interface configured for SRB, you must also define a pseudoring for this interface with the multiring trcrf-vlan command. In this case, the VLAN ID used for the TrCRF that corresponds to the virtual ring can be the same as the one used for the pseudoring. If the VLAN IDs are different, the virtual ring and pseudoring numbers must be different.
Examples
The following example shows both SRB and IP routing for SR frames:
source-bridge ring-group 100interface Token Ring3/1source-bridge 10 1 100source-bridge spanning!interface vlan999 type trbrf source-bridge trcrf-vlan 400 ring-group 100source-bridge spanningmultiring allmultiring trcrf-vlan 400 ring-group 100Note that the ring number must be the same for the source-bridge ring-group, source-bridge, and source-bridge trcrf-vlan commands. In this example, the ring number of the pseudoring also matches the virtual ring number.
Related Commands
spanning-tree portfast (interface mode)
To enable PortFast on a specific interface, use the spanning-tree portfast command in interface configuration mode. To disable PortFast, use the no form of this command.
spanning-tree portfast {disable | trunk}
no spanning-tree portfast
Syntax Description
disable
Disables PortFast on the interface.
trunk
Enables PortFast on the interface when it is in trunk mode.
Command Default
Portfast on an interface defaults to the state of portfast on the device.
Command Modes
Interface configuration (config-if)
Command History
Usage Guidelines
Use this command only with interfaces that connect to end stations; otherwise, an accidental data-packet loop could form that disrupts operations of both the Cisco 7600 series router and the network.
An interface with PortFast mode enabled moves directly to the spanning-tree forwarding state when linkup occurs. No waiting for the standard forward-time delay is required.
The spanning-tree portfast command has four states:
•
•
•
•
The no spanning-tree portfast command does not disable PortFast if the spanning-tree portfast default command is enabled.
Examples
The following example shows how to enable PortFast on an interface:
Router(config-if)# spanning-tree portfastRelated Commands
show spanning-tree
Displays information about the spanning-tree state.
spanning-tree portfast default
Enables PortFast by default on all access ports.
