Cisco IOS Bridging and IBM Networking Command Reference, Volume 1 of 2: Bridging, Release 12.3 T
Bridging Commands: show acc through show vla

Table Of Contents

show access-expression

show bridge circuit-group

show bridge group

show bridge multicast

show bridge vlan

show bridge

show controllers token (IBM)

show drip

show interfaces crb

show interfaces irb

show interfaces tokenring (IBM)

show lnm bridge

show lnm config

show lnm interface

show lnm ring

show lnm station

show netbios-cache

show pxf cpu statistics

show pxf cpu subblock

show pxf cpu tbridge

show rif

show source-bridge

show span

show spanning-tree

show subscriber-policy


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

Release
Modification

11.3

This command was introduced.


Examples

The following is sample output from the show access-expression command:

Router# show access-expression
Router# Interface TokenRing0/0:
        Input:(dmac(701) | ~lsap(202))

See the access-expression command for a description of the access expressions.

Related Commands

Command
Description

access-expression

Defines an access expression.


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

bridge-group

(Optional) Number that specifies a particular bridge group.

circuit-group

(Optional) Number that specifies a particular circuit group.

src-mac-address

(Optional) 48-bit canonical (Ethernet ordered) source MAC address.

dst-mac-address

(Optional) 48-bit canonical (Ethernet ordered) destination MAC address.


Command Modes

User EXEC
Prvileged EXEC

Command History

Release
Modification

10.3

This command was introduced.


Examples

The following is sample output from various show bridge circuit-group command strings:

Router# show bridge circuit-group

Bridge group 1 Circuit group 1:
	Interface Serial0 : inserted, learning, forwarding
	Interface Serial3 : inserted, learning, forwarding
Bridge group 1 Circuit group 2:
	Interface Serial2 : inserted, learning, forwarding

Router# show bridge 1 circuit-group 1

Bridge group 1 Circuit group 1:
	Interface Serial0 : inserted, learning, forwarding
	Interface Serial3 : inserted, learning, forwarding

Router# show bridge 1 circuit-group 2

Bridge group 1 Circuit group 2:
	Interface Serial2 : inserted, learning, forwarding

Router# show bridge 1 circuit-group 1 0000.6502.23EA 0000.1234.4567

Output circuit group interface is Serial3

Router# show bridge 1 circuit-group 1 0000.6502.23EA

%Destination MAC address required

Router# show bridge 1 circuit-group 1

Bridge group 1 Circuit group 1:
	Transmission pause interval is 250ms
	Output interface selection is source-based
	Interface Serial0 : inserted, learning, forwarding
	Interface Serial3 : inserted, learning, forwarding
	Interface Serial2 is unavailable

Router# show bridge 1 circuit-group 1 0000.6502.23EA 0000.1234.4567

%Please enter source MAC address only

Table 7 describes the significant fields shown in the display.

Table 7 show bridge circuit-group Field Descriptions 

Field
Description

inserted

Indicates whether this interface is included or not included in circuit-group operation. If the interface is administratively down, or if line protocol is not up, the interface is not included in the circuit-group operation.

learning

Indicates whether this interface is in Spanning Tree Protocol (IEEE or Digital) learning or not learning state.

forwarding

Indicates whether this port is in Spanning Tree Protocol (IEEE or Digital) forwarding or not forwarding state.


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

verbose

(Optional) Displays detailed information.


Command Modes

Privileged EXEC

Command History

Release
Modification

10.3

This command was introduced.


Examples

The following is sample output from the show bridge group command:


Router# show bridge group

Bridge Group 1 is running the DEC compatible Spanning Tree Protocol
   Port 7 (ATM0.1 LANE Ethernet) of bridge group 1 is down
   Port 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 group 

Bridge Group 30 is running the IEEE compatible Spanning Tree Protocol
   Port 19 (Fast Ethernet3/0) of bridge group 30 is forwarding
   Port 20 (Fast Ethernet3/1) of bridge group 30 is forwarding
   Port 21 (Ethernet3/2) of bridge group 30 is forwarding
   Port 22 (Ethernet3/3) of bridge group 30 is forwarding
   Port 23 (Ethernet3/4) of bridge group 30 is forwarding
   Port 24 (Ethernet3/5) of bridge group 30 is forwarding
   Port 25 (Ethernet3/6) of bridge group 30 is forwarding
Bridge Group 40 is running the IEEE compatible Spanning Tree Protocol
   Port 26 (Ethernet3/7) of bridge group 40 is down
   Port 27 (Ethernet3/8) of bridge group 40 is down
   Port 28 (Ethernet3/9) of bridge group 40 is down
   Port 29 (Ethernet3/10) of bridge group 40 is down
   Port 30 (Ethernet3/11) of bridge group 40 is down
   Port 31 (Ethernet3/12) of bridge group 40 is down
   Port 32 (Ethernet3/13) of bridge group 40 is down

show 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

bridge-group

(Optional) Bridge group number specified in the bridge protocol command.

router-ports

(Optional) Display information for multicast router ports.

groups

(Optional) Display information for multicast groups.

group-address

(Optional) Multicast IP address associated with a specific multicast group.


Command Modes

User EXEC
Privileged EXEC

Command History

Release
Modification

11.2

This command was introduced.


Examples

The following is sample output from the show bridge multicast command:

Router# show bridge multicast

 Multicast router ports for bridge group 1:

  2 multicast router ports
   Fddi2/0         R
   Ethernet0/4     R

 Multicast groups for bridge group 1:

  235.145.145.223            RX count     TX count
   Fddi2/0         R                0            2
   Ethernet0/4     R                0            3
   Ethernet0/3     G                1            0

  235.5.5.5                  RX count     TX count
   Fddi2/0         R                0            2
   Ethernet0/4     R                0            3
   Ethernet0/3     G                1            0

  235.4.4.4                  RX count     TX count
   Fddi2/0         R                0            2
   Ethernet0/4     R                0            3
   Ethernet0/3     G                1            0

Table 8 describes the significant fields shown in the display.

Table 8 show bridge multicast Field Descriptions 

Field
Description

Multicast router ports for...

List of the multicast router ports by bridge group. Within the bridge group cluster, the display lists the number of multicast router ports and then lists the ports by interface.

Multicast groups for...

List of the multicast groups by bridge group.

Within each multicast group, identified by a unique address, the display lists each port by interface name and indicates whether that port is a group member ("G"), a multicast router port ("R"), or both.

The receive (RX) and transmit (TX) counts show the number of multicast packets that have been constrained to the multicast group by the bridge.


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

Release
Modification

10.3

This command was introduced.


Examples

The following is sample output from the show bridge vlan command:

Router# show bridge vlan

Bridge Group: 50

Virtual LAN Trunking Interface(s):  vLAN Protocol:     vLAN ID:  State

Fddi2/0.1000                        IEEE 802.10        1000      forwarding
Fast Ethernet4/0.500                 Inter Switch Link  500       listening

Virtual LAN Native Interface(s):    State

Ethernet0/1                         forwarding
Serial1/1                           down


Table 9 describes the fields shown in the display.

Table 9 show bridge vlan Field Descriptions 

Field
Description

Bridge Group

Bridge group to which these interfaces belong.

Virtual LAN Trunking Interface(s)

VLAN interface.

vLAN Protocol)

IEEE 802.10 or Cisco Inter-Switch Link (ISL) encapsulation.

vLAN ID

VLAN identifier that maintains VLAN identities between switches.

State

Spanning-tree port state of the interface.

Virtual LAN Native Interface(s):

Interfaces whose transparently bridged traffic will be propagated only to other LAN segments within the same virtual LAN.


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

bridge-group

(Optional) Number that specifies a particular spanning tree.

interface

(Optional) Specific interface, such as Ethernet 0.

address

(Optional) 48-bit canonical (Ethernet ordered) MAC address. This may be entered with an optional mask of bits to be ignored in the address, which is specified with the mask argument.

mask

(Optional) Bits to be ignored in the address. You must specify the address argument if you want to specify a mask.

verbose

(Optional) Displays additional detail, including any Frame Relay data-link connection identifier (DLCI) associated with a station address.


Command Modes

Privileged EXEC

Command History

Release
Modification

10.0

This command was introduced.

11.0

The verbose keyword was added.


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 0
show bridge 0000.0c00.0000 0000.00FF.FFFF
show bridge 0000.0c00.0e1a
show bridge
show bridge verbose

In 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 bridge

Total of 300 station blocks, 280 free
Codes: P - permanent, S - self

Bridge Group 32:Bridge Group 32:

    Address       Action   Interface       Age   RX count   TX count
0180.c200.0000   receive       -            S           0          0
ffff.ffff.ffff   receive       -            S           0          0
0900.2b01.0001   receive       -            S           0          0
0300.0c00.0001   receive       -            S           0          0
0000.0c05.1000   forward   Ethernet0/1      4           1          0
0000.0c04.4b5b   receive       -            S           0          0
0000.0c04.4b5e   receive       -            S           0          0
0000.0c04.4b5d   receive       -            S           0          0
0000.0c04.4b5c   receive       -            S           0          0
0000.0c05.4a62   forward   Ethernet0/1      4           1          0
aa00.0400.2108   forward   Ethernet0/1      0          42          0
0000.0c12.b888   forward   Ethernet0/2      4           1          0
0000.0c12.b886   forward   Ethernet0/1      4           1          0
aa00.0400.4d09   forward   Ethernet0/1      4           1          0
0000.0c06.fb9a   forward   Ethernet0/1      4           1          0
0000.0c04.b039   forward   Ethernet0/1      4           1          0
Router# show bridge verbose

Total of 300 station blocks, 287 free
Codes: P - permanent, S - self

BG Hash      Address      Action Interface     DLCI   Age 	RX count   TX count
32 00/0   0180.c200.0000 receive      -           -     S           0          0
32 00/1   ffff.ffff.ffff receive      -           -     S           0          0
32 01/0   0900.2b01.0001 receive      -           -     S           0          0
32 01/1   0300.0c00.0001 receive      -           -     S           0          0
32 10/0   0000.0c04.4b5b receive      -           -     S           0          0
32 15/0   0000.0c04.4b5e receive      -           -     S           0          0
32 16/0   0000.0c04.4b5d receive      -           -     S           0          0
32 17/0   0000.0c04.4b5c receive      -           -     S           0          0
32 29/0   aa00.0400.2108 forward  Ethernet0/1     -     0          48          0
32 30/0   0000.0c12.b888 forward  Ethernet0/2     -     0           1          0
32 A4/0   0800.2002.ff5b forward  Ethernet0/1     -     0           6          0
32 E2/0   aa00.0400.e90b forward  Ethernet0/1     -     0          65          0
32 F2/0   0000.0c04.b042 forward  Ethernet0/2     -     3           2          0

Table 10 describes the significant fields shown in the display.

Table 10 show bridge Field Descriptions 

Field
Description

Total of 300 station blocks

Total number of forwarding database elements in the system. The memory to hold bridge entries is allocated in blocks of memory sufficient to hold 300 individual entries. When the number of free entries falls below 25, another block of memory sufficient to hold another 300 entries is allocated. Therefore, the size of the bridge forwarding database is limited to the amount of free memory in the router.

295 free

Number in the free list of forwarding database elements in the system. The total number of forwarding elements is expanded dynamically, as needed.

BG

Bridging group to which the address belongs.

Hash

Hash key/relative position in the keyed list.

Address

Canonical (Ethernet ordered) MAC address.

Action

Action to be taken when that address is looked up; choices are to discard or forward the datagram.

Interface

Interface, if any, on which that address was seen.

Age

Number of minutes since a frame was received from or sent to that address. The letter "P" indicates a permanent entry. The letter "S" indicates the system as recorded by the router. On the modular systems, this is typically the broadcast address and the router's own hardware address; on the IGS, this field will also include certain multicast addresses.

RX count

Number of frames received from that address.

TX count

Number of frames forwarded to that address.


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

Release
Modification

10.0

This command was introduced.


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 token

TR Unit 0 is board 0 - ring 0

 state 3, dev blk: 0x1D2EBC, mailbox: 0x2100010, sca: 0x2010000
   current address: 0000.3080.6f40, burned in address: 0000.3080.6f40
   current TX ptr: 0xBA8, current RX ptr: 0x800

   Last Ring Status: none

 Stats: soft:0/0, hard:0/0, sig loss:0/0
        tx beacon: 0/0, wire fault 0/0, recovery: 0/0
        only station: 0/0, remote removal: 0/0
   Bridge: local 3330, bnum 1, target 3583
     max_hops 7, target idb: 0x0, not local
   Interface failures: 0 -- Bkgnd Ints: 0
   TX shorts 0, TX giants 0

   Monitor state: (active)
     flags 0xC0, state 0x0, test 0x0, code 0x0, reason 0x0
 f/w ver: 1.0, chip f/w: '000000.ME31100', [bridge capable]
     SMT form of this command s: 1.01 kernel, 4.02 fastmac
     ring mode: F00, internal enables: SRB REM RPS CRS/NetMgr
     internal functional: 0000011A (0000011A), group: 00000000 (00000000)
     if_state: 1, ints: 0/0, ghosts: 0/0, bad_states: 0/0
     t2m fifo purges: 0/0
     t2m fifo current: 0, t2m fifo max: 0/0, proto_errs: 0/0
     ring: 3330, bridge num: 1, target: 3583, max hops: 7

Packet counts:
       receive total: 298/6197, small: 298/6197, large 0/0
               runts: 0/0, giants: 0/0
               local: 298/6197, bridged: 0/0, promis: 0/0
             bad rif: 0/0, multiframe: 0/0
       ring num mismatch 0/0, spanning violations 0
       transmit total: 1/25, small: 1/25, large 0/0
                runts: 0/0, giants: 0/0, errors 0/0
bad fs: 0/0, bad ac: 0
congested: 0/0, not present: 0/0
     Unexpected interrupts: 0/0, last unexp. int: 0

     Internal controller counts:
    line errors:  0/0, internal errors: 0/0
    burst errors: 0/0, ari/fci errors:  0/0
    abort errors: 0/0, lost frame: 0/0
    copy errors:  0/0, rcvr congestion: 0/0
    token errors: 0/0, frequency errors: 0/0
    dma bus errors: -/-, dma parity errors: -/-
     Internal controller smt state:
    Adapter MAC:     0000.3080.6f40, Physical drop:     00000000
    NAUN Address:    0000.a6e0.11a6, NAUN drop:         00000000
    Last source:     0000.a6e0.11a6, Last poll:         0000.3080.6f40
    Last MVID:       0006,           Last attn code:    0006
    Txmit priority:  0006,           Auth Class:        7FFF
    Monitor Error:   0000,           Interface Errors:  FFFF
    Correlator:      0000,           Soft Error Timer:  00C8
    Local Ring:      0000,           Ring Status:       0000
    Beacon rcv type: 0000,           Beacon txmit type: 0000
    Beacon type:     0000,           Beacon NAUN:       0000.a6e0.11a6

Table 11, Part 1 describes the fields shown in the first line of sample output.

Table 11, Part 1 show controllers token Field Descriptions 

Field
Description

TR Unit 0

Unit number assigned to the Token Ring interface associated with this output.

is board 0

Board number assigned to the Token Ring controller board associated with this interface.

ring 0

Number of the Token Ring associated with this board.


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: 0x2010000

The 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: 0000.3080.6f40

The following line displays buffer management pointers that change by board:

current TX ptr: 0xBA8, current RX ptr: 0x800

The following line indicates the ring status from the controller chipset. This information is used by LAN Network Manager:

Last Ring Status: none

The following line displays Token Ring statistics. See the Token Ring specification for more information:

Stats: soft:0/0, hard:0/0, sig loss:0/0
        tx beacon: 0/0, wire fault 0/0, recovery: 0/0
        only station: 0/0, remote removal: 0/0

The 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 3583

Table 11, Part 2 describes the fields shown in the following line of sample output:

max_hops 7, target idb: 0x0, not local

Table 11, Part 2 show controllers token Field Descriptions

Field
Description

max_hops 7

Maximum number of bridges.

target idb: 0x0

Destination interface definition.

not local

Interface has been defined as a remote bridge.


The following line is specific to the hardware:

Interface failures: 0 -- Bkgnd Ints: 0

In 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 0

The 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 0x0

Table 11, 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]

Table 11, Part 3 show controllers token Field Descriptions 

Field
Description

f/w ver: 1.0

Version of Cisco firmware on the board.

chip f/w: '000000.ME31100'

Firmware on the chipset.

[bridge capable]

Interface has not been configured for bridging, but it has that capability.


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 fastmac

The following line displays LAN Network Manager information that relates to ring status:

ring mode: F00, internal enables: SRB REM RPS CRS/NetMgr

The 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: 0/0

The following lines display information that is proprietary. Our engineers use this information for debugging purposes:

t2m fifo purges: 0/0
t2m fifo current: 0, t2m fifo max: 0/0, proto_errs: 0/0

Each 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: 7

In 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 0/0

In 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: 0/0

The following lines are receiver-specific information that Cisco engineers can use for debugging purposes:

local: 298/6197, bridged: 0/0, promis: 0/0
bad rif: 0/0, multiframe: 0/0
ring num mismatch 0/0, spanning violations 0
transmit total: 1/25, small: 1/25, large 0/0
runts: 0/0, giants: 0/0, errors 0/0

The 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: 0/0
 burst errors: 0/0, ari/fci errors: 0/0
 abort errors: 0/0, lost frame: 0/0
 copy errors: 0/0, rcvr congestion: 0/0
 token errors: 0/0, frequency errors: 0/0
 dma 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:     00000000
 NAUN Address:    0000.a6e0.11a6, NAUN drop:         00000000
 Last source:     0000.a6e0.11a6, Last poll:         0000.3080.6f40
 Last MVID:       0006,           Last attn code:    0006
 Txmit priority:  0006,           Auth Class:        7FFF
 Monitor Error:   0000,           Interface Errors:  FFFF
 Correlator:      0000,           Soft Error Timer:  00C8
 Local Ring:      0000,           Ring Status:       0000
 Beacon rcv type: 0000,           Beacon txmit type: 0000

show drip

To display the status of the duplicate ring protocol (DRiP) database for a router or an 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

Release
Modification

11.3(4)T

This command was introduced.


Examples

The following is sample output from the show drip command:

Router# show drip

DRIP Database for Mgmt Domain Fast Ethernet4/0
--------------------------------------------------
Mac Address 0010-A6AE-B440
Vlan     100    Status    30 : l-active, l-config, 

Mac Address 0010-2F72-C800
Vlan      20    Status    0C : r-active, r-config, 
Vlan    1003    Status    0C : r-active, r-config,

Statistics:
Advertisements received            126
Advertisements processed           1
Advertisements transmitted         131
Last revision transmitted          0x84
Last changed revision transmitted  0x2

Related Commands

Command
Description

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

Release
Modification

11.0

This command was introduced.


Examples

The following is sample output from the show interfaces crb command:


Router# show interfaces crb

Ethernet0/0

Routed protocols on Ethernet0/0:
appletalk decnet ip novell

Ethernet0/1

Routed protocols on Ethernet0/1:
appletalk  decnet  ip  novell

Ethernet0/2

Routed protocols on Ethernet0/2:
appletalk  ip

Bridged protocols on Ethernet0/2:
clns  decnet  vines  apollo
novell  xns

Software MAC address filter on Ethernet0/2
Hash Len   Address         Matches   Act   Type
0x00: 0    ffff.ffff.ffff  0         RCV   Physical broadcast
0x00: 1    ffff.ffff.ffff  0         RCV   Appletalk zone
0x2A: 0    0900.2b01.0001  0         RCV   DEC spanning tree
0x49: 0    0000.0c36.7a45  0         RCV   Interface MAC address
0xc0: 0    0100.0ccc.cccc  20        RCV   CDP
0xc2: 0    0180.c200.0000  0         RCV   IEEE spanning tree
0xF8: 0    0900.07ff.ffff  0         RCV   Appletalk broadcast

Ethernet0/3

Routed protocols on Ethernet0/3:
appletalk  ip

Bridged protocols on Ethernet0/3:
clns  decnet  vines  apollo
novell  xns

Software MAC address filter on Ethernet0/3
Hash Len   Address         Matches   Act   Type
0x00: 0    ffff.ffff.ffff  0         RCV   Physical broadcast
0x00: 1    ffff.ffff.ffff  0         RCV   Appletalk zone
0x2A: 0    0900.2b01.0001  0         RCV   DEC spanning tree
0x49: 0    0000.0c36.7a45  0         RCV   Interface MAC address
0xc0: 0    0100.0ccc.cccc  48        RCV   CDP
0xc2: 0    0180.c200.0000  0         RCV   IEEE spanning tree
0xF8: 0    0900.07ff.ffff  0         RCV   Appletalk broadcast 

Table 12 describes the significant fields shown in the display.

Table 12 show interfaces crb Field Descriptions 

Field
Description

Routed protocols on...

List of the routed protocols configured for the specified interface.

Bridged protocols on...

List of the bridged protocols configured for the specified interface.

Software MAC address filter on...

Table of software MAC address filter information for the specified interface.

Hash

Hash key/relative position in the keyed list for this MAC-address entry.

Len

Length of this entry to the beginning element of this hash chain.

Address

Canonical (Ethernet ordered) MAC address.

Matches

Number of received packets matched to this MAC address.

Act

Action to be taken when that address is looked up; choices are to receive or discard the packet.

Type

MAC address type.


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

ethernet

Specify Ethernet interface.

fastethernet

Specify Fast Ethernet interface.

interface

(Optional) Specific interface, such as Ethernet 0.

slot/port

(Optional) Specific slot and port, such as Fast Ethernet 3/0.


Command Modes

Privileged EXEC

Command History

Release
Modification

11.2

This command was introduced.


Examples

The following is sample output from the show interfaces irb command:

Router# show interfaces ethernet 2 irb

Ethernet 2

Routed protocols on Ethernet 2:
appletalk ip

Bridged protocols on Ethernet 2:
appletalk   clns   decnet   vines
apollo      ipx    xns

Software MAC address filter on Ethernet 2
Hash Len  Address         Matches  Act   Type
0x00: 0   ffff.ffff.ffff  4886     RCV   Physical broadcast
0x1F: 0   0060.3e2b.a221  7521     RCV   Appletalk zone
0x1F: 1   0060.3e2b.a221  0        RCV   Bridge-group Virtual Interface
0x2A: 0   0900.2b01.0001  0        RCV   DEC spanning tree
0x05: 0   0900.0700.00a2  0        RCV   Appletalk zone
0xC2: 0   0180.c200.0000  0        RCV   IEEE spanning tree
0xF8: 0   0900.07ff.ffff  2110     RCV   Appletalk broadcast

The 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 irb

Fast Ethernet3/0

 Routed protocols on Fast Ethernet3/0:
  ip       

 Bridged protocols on Fast Ethernet3/0:
  appletalk  clns       decnet     ip       
  vines      apollo     ipx        xns      

 Software MAC address filter on Ethernet3/0
  Hash Len    Address      Matches  Act      Type
  0x00:  0 ffff.ffff.ffff         0 RCV Physical broadcast
  0x2A:  0 0900.2b01.0001         0 RCV DEC spanning tree
  0xC2:  0 0180.c200.0000         0 RCV IEEE spanning tree
  0xC7:  0 00e0.f7a4.5130         0 RCV Interface MAC address
  0xC7:  1 00e0.f7a4.5130         0 RCV Bridge-group Virtual Interface


Table 13 describes the significant fields shown in the displays.

Table 13 show interfaces irb Field Descriptions 

Field
Description

Routed protocols on...

List of the routed protocols configured for the specified interface.

Bridged protocols on...

List of the bridged protocols configured for the specified interface.

Software MAC address filter on...

Table of software MAC address filter information for the specified interface.

Hash

Hash key/relative position in the keyed list for this MAC-address entry.

Len

Length of this entry to the beginning element of this hash chain.

Address

Canonical (Ethernet ordered) MAC address.

Matches

Number of received packets matched to this MAC address.

Act

Action to be taken when that address is looked up; choices are to receive or discard the packet.

Type

MAC address type.


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

Release
Modification

10.0

This command was introduced.


Examples

The following is sample output from the show interfaces tokenring command:

Router# show interfaces tokenring

TokenRing 0 is up, line protocol is up
Hardware is 16/4 Token Ring, address is 5500.2000.dc27 (bia 0000.3000.072b)
   Internet address is  10.136.230.203, subnet mask is 255.255.255.0
   MTU 8136 bytes, BW 16000 Kb, DLY 630 usec, rely 255/255, load 1/255
   Encapsulation SNAP, loopback not set, keepalive set (10 sec)
   ARP type: SNAP, ARP Timeout 4:00:00
   Ring speed: 16 Mbps
   Single ring node, Source Route Bridge capable
   Group Address: 0x00000000, Functional Address: 0x60840000
   Last input 0:00:01, output 0:00:01, output hang never
   Output queue 0/40, 0 drops; input queue 0/75, 0 drops
   Five minute input rate 0 bits/sec, 0 packets/sec
   Five minute output rate 0 bits/sec, 0 packets/sec
   16339 packets input, 1496515 bytes, 0 no buffer
        Received 9895 broadcasts, 0 runts, 0 giants
        0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     32648 packets output, 9738303 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets, 0 restarts
     5 transitions

Table 14 describes the significant fields shown in the display.

Table 14 show interfaces tokenring Field Descriptions 

Field
Description

Token Ring is up

Interface is currently active and inserted into ring (up) or inactive and not inserted (down).

Token Ring is Reset

Hardware error has occurred. This is not in the sample output; it is informational only.

Token Ring is Initializing

Hardware is up, in the process of inserting the ring. This is not in the sample output; it is informational only.

Token Ring is Administratively Down

Hardware has been taken down by an administrator. This is not in the sample output; it is informational only. "Disabled" indicates the Cisco IOS software has received over 5000 errors in a keepalive interval, which is 10 seconds by default.

line protocol is up

Indicates whether the software processes that handle the line protocol believe the interface is usable (that is, whether keepalives are successful).

Hardware

Specifies the hardware type. "Hardware is ciscoBus Token Ring" indicates that the board is a CSC-C2CTR board. "Hardware is 16/4 Token Ring" indicates that the board is a CSC-1R, CSC-2R, or a CSC-R16M board. Also shows the address of the interface.

Internet address

Lists the Internet address followed by the subnet mask.

MTU

Maximum transmission unit of the interface.

BW

Bandwidth of the interface in kilobits per second.

DLY

Delay of the interface in microseconds.

rely

Reliability of the interface as a fraction of 255 (255/255 is 100 percent reliability), calculated as an exponential average over 5 minutes.

load

Load on the interface as a fraction of 255 (255/255 is completely saturated), calculated as an exponential average over 5 minutes.

Encapsulation

Encapsulation method assigned to interface.

loopback

In