Catalyst 4500 Series Switch Cisco IOS Command Reference, 12.2(20)EW - show access-group mode interface through show vtp [Cisco Catalyst 4500 Series Switches]

Table Of Contents

show access-group mode interface

show arp access-list

show auto install status

show auto qos

show bootflash:

show bootvar

show class-map

show diagnostic result module

show diagnostic result module test 2

show diagnostic result module test 3

show dot1x

show environment

show errdisable detect

show errdisable recovery

show etherchannel

show flowcontrol

show idprom

show interfaces

show interfaces capabilities

show interfaces counters

show interfaces description

show interfaces link

show interfaces mtu

show interfaces private-vlan mapping

show interfaces status

show interfaces switchport

show interfaces transceiver

show interfaces trunk

show ip arp inspection

show ip arp inspection log

show ip cef vlan

show ip dhcp snooping

show ip dhcp snooping binding

show ip dhcp snooping database

show ip igmp interface

show ip igmp profile

show ip igmp snooping

show ip igmp snooping membership

show ip igmp snooping mrouter

show ip igmp snooping vlan

show ip mfib

show ip mfib fastdrop

show ip mroute

show ip source binding

show ip verify source

show ipc

show l2protocol-tunnel

show lacp

show mac access-group interface

show mac-address-table address

show mac-address-table aging-time

show mac-address-table count

show mac-address-table dynamic

show mac-address-table interface

show mac-address-table multicast

show mac-address-table protocol

show mac-address-table static

show mac-address-table vlan

show module

show monitor

show pagp

show policy-map

show policy-map interface

show port-security

show power

show qos

show qos aggregate policer

show qos dbl

show qos interface

show qos maps

show redundancy

show running-config

show slavebootflash:

show slaveslot0:

show slot0:

show spanning-tree

show spanning-tree mst

show storm-control

show system mtu

show tech-support

show udld

show vlan

show vlan access-map

show vlan counters

show vlan dot1q tag native

show vlan internal usage

show vlan mtu

show vlan private-vlan

show vlan remote-span

show vmps

show vtp

22

show access-group mode interface

To display the ACL configuration on a Layer 2 interface, use the show mac access-group interface command.

show access-group mode interface [interface interface-number]
Syntax Description

interface

(Optional) Interface type; valid values are ethernet, FastEthernet, GigabitEthernet, and port-channel.

interface-number

(Optional) Interface number.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

Valid values for the port number depend on the chassis used.

Examples

This example shows how to display the ACL configuration on interface fast 6/1:
Switch# show access-group mode interface fast 6/1
Interface FastEthernet6/1:
   Access group mode is: merge
Related Commands

access-group mode

show arp access-list

To display detailed information on an ARP access list, use the show arp command.

show arp access-list
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the ARP ACL information for a switch:
Switch# show arp access-list
ARP access list rose
    permit ip 10.101.1.1 0.0.0.255 mac any
    permit ip 20.3.1.0 0.0.0.255 mac any
Related Commands

access-group mode
arp access-list
ip arp inspection filter vlan

show auto install status

To display the status of an automatic installation, use the show auto install status command.

show auto install status
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.2(20)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the IP address of the TFTP server and to display whether or not the switch is currently acquiring the configuration file on the TFTP server:
Switch# show auto install status
Status              : Downloading config file
DHCP Server         : 20.0.0.1
TFTP Server         : 30.0.0.3
Config File Fetched : Undetermined
The first IP address in the display indicates the server that is used for the automatic installation. The second IP address indicates the TFTP server that provided the configuration file.

show auto qos

To display the automatic quality of service (auto-QoS) configuration that is applied, use the show auto qos user EXEC command.

show auto qos [interface [interface-id]] [{begin | exclude | include} expression]
Syntax Description

interface interface-id

(Optional) Displays auto-QoS information for the specified interface or for all interfaces. Valid interfaces include physical ports.

begin

(Optional) Begins with the line that matches the expression.

exclude

(Optional) Excludes lines that match the expression.

include

(Optional) Includes lines that match the specified expression.

expression

(Optional) Expression in the output to use as a reference point.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

The show auto qos interface interface-id command displays the auto-QoS configuration; it does not display any user changes to the configuration that might be in effect.

To display information about the QoS configuration that might be affected by auto-QoS, use one of these commands:

•show qos

•show qos map

•show qos interface interface-id

•show running-config

Expressions are case sensitive. For example, if you enter exclude output, the lines that contain output do not appear, but the lines that contain Output appear.

Examples

This example shows output from the show auto qos command when auto-QoS is enabled:
Switch# show auto qos 
00:00:55:qos
00:00:56:qos map cos 3 to dscp 26
00:00:57:qos map cos 5 to dscp 46
00:00:58:qos map dscp 16 to tx-queue 1
00:00:58:qos map dscp 32 to tx-queue 1
00:00:58:qos dbl
00:00:59:policy-map autoqos-voip-policy
00:00:59:  class class-default
00:00:59:   dbl
00:00:59:interface GigabitEthernet1/1
00:00:59: qos trust device cisco-phone
00:00:59: qos trust cos
00:00:59: tx-queue 3
00:00:59:  priority high
00:00:59:  shape percent 70
00:00:59:  service-policy output autoqos-voip-policyend
This example shows output from the show auto qos interface command when the auto qos voip cisco-phone interface configuration command is entered:
Switch# show auto qos interface
Initial configuration applied by AutoQoS:
!
interface GigabitEthernet1/1
qos trust device cisco-phone
qos trust cos
tx-queue 3
priority high
shape percent 70
service-policy output autoqos-voip-policy
!
interface GigabitEthernet1/2
qos trust device cisco-phone
qos trust cos
tx-queue 3
priority high
shape percent 70
service-policy output autoqos-voip-policy
This example shows output from the show auto qos interface gigabitethernet1/1 command when the auto qos voip cisco-phone interface configuration command is entered:
Switch# show auto qos interface gigabitethernet1/1
Initial configuration applied by AutoQoS:
!
interface GigabitEthernet1/1
qos trust device cisco-phone
qos trust cos
tx-queue 3
priority high
shape percent 70
service-policy output autoqos-voip-policy
This example shows output from the show auto qos command when auto-QoS is disabled:
Switch# show auto qos
AutoQoS is disabled
Related Commands

auto qos voip

show bootflash:

To display information about the bootflash: file system, use the show bootflash: command.

show bootflash: [all | chips | filesys]
Syntax Description

all

(Optional) Displays all possible Flash information.

chips

(Optional) Displays Flash chip information.

filesys

(Optional) Displays file system information.

Defaults

This command has no default settings.

Command Modes

EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display file system status information:
Switch> show bootflash: filesys
-------- F I L E   S Y S T E M   S T A T U S --------
  Device Number = 0
DEVICE INFO BLOCK: bootflash
  Magic Number          = 6887635   File System Vers = 10000    (1.0)
  Length                = 1000000   Sector Size      = 40000
  Programming Algorithm = 39        Erased State     = FFFFFFFF
  File System Offset    = 40000     Length = F40000
  MONLIB Offset         = 100       Length = C628
  Bad Sector Map Offset = 3FFF8     Length = 8
  Squeeze Log Offset    = F80000    Length = 40000
  Squeeze Buffer Offset = FC0000    Length = 40000
  Num Spare Sectors     = 0
    Spares:
STATUS INFO:
  Writable
  NO File Open for Write
  Complete Stats
  No Unrecovered Errors
  No Squeeze in progress
USAGE INFO:
  Bytes Used     = 917CE8  Bytes Available = 628318
  Bad Sectors    = 0       Spared Sectors  = 0
  OK Files       = 2       Bytes = 917BE8
  Deleted Files  = 0       Bytes = 0
  Files w/Errors = 0       Bytes = 0
Switch>    
This example shows how to display system image information:
Switch> show bootflash:
-# - ED --type-- --crc--- -seek-- nlen -length- -----date/time------ name
1   .. image    8C5A393A  237E3C   14  2063804 Aug 23 1999 16:18:45 c4-boot-mz
2   .. image    D86EE0AD  957CE8    9  7470636 Sep 20 1999 13:48:49 rp.halley  
Switch> 
This example shows how to display all bootflash information:
Switch> show bootflash: all
-# - ED --type-- --crc--- -seek-- nlen -length- -----date/time------ name
1   .. image    8C5A393A  237E3C   14  2063804 Aug 23 1999 16:18:45 c4-boot-
mz
2   .. image    D86EE0AD  957CE8    9  7470636 Sep 20 1999 13:48:49 rp.halley
6456088 bytes available (9534696 bytes used)
-------- F I L E   S Y S T E M   S T A T U S --------
  Device Number = 0
DEVICE INFO BLOCK: bootflash
  Magic Number          = 6887635   File System Vers = 10000    (1.0)
  Length                = 1000000   Sector Size      = 40000
  Programming Algorithm = 39        Erased State     = FFFFFFFF
  File System Offset    = 40000     Length = F40000
  MONLIB Offset         = 100       Length = C628
  Bad Sector Map Offset = 3FFF8     Length = 8
  Squeeze Log Offset    = F80000    Length = 40000
  Squeeze Buffer Offset = FC0000    Length = 40000
  Num Spare Sectors     = 0
    Spares:
STATUS INFO:
  Writable
  NO File Open for Write
  Complete Stats
  No Unrecovered Errors
  No Squeeze in progress
USAGE INFO:
  Bytes Used     = 917CE8  Bytes Available = 628318
  Bad Sectors    = 0       Spared Sectors  = 0
  OK Files       = 2       Bytes = 917BE8
  Deleted Files  = 0       Bytes = 0
  Files w/Errors = 0       Bytes = 0
Switch>       
show bootvar

To display BOOT environment variable information, use the show bootvar command.

show bootvar
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display BOOT environment variable information:
Switch# show bootvar
BOOT variable = sup:1;
CONFIG_FILE variable does not exist
BOOTLDR variable does not exist
Configuration register is 0x0
Switch#          
show class-map

To display class map information, use the show class-map command.

show class-map class_name
Syntax Description

class_name

Name of the class map.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display class map information for all class maps:
Switch# show class-map 
 Class Map match-any class-default (id 0)
   Match any
 Class Map match-any class-simple (id 2)
   Match any
 Class Map match-all ipp5 (id 1)
   Match ip precedence 5
 Class Map match-all agg-2 (id 3)
Switch# 
This example shows how to display class map information for a specific class map:
Switch# show class-map ipp5
 Class Map match-all ipp5 (id 1)
   Match ip precedence 5
Switch#   
Related Commands

class-map
show policy-map
show policy-map interface

show diagnostic result module

To display module-based diagnostic test results, use the show diagnostic result module command.

show diagnostic result module [slot-num | all] [test [test-id | test-id-range | all]] [detail]
Syntax Description

slot-num

(Optional) Specifies the slot on which diagnostics are displayed.

all

(Optional) Displays diagnostics for all slots.

test

(Optional) Displays selected tests on the specified module.

test-id

(Optional) Specifies a single test ID.

test-id-range

(Optional) Specifies a range of test IDs.

all

(Optional) Displays diagnostics for all tests.

detail

(Optional) Displays complete test results.

Defaults

A summary of the test results for all modules in the chassis is displayed.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.2(18)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the summary results for all modules in the chassis:
Switch# show diagnostic result module
Current bootup diagnostic level: minimal
module 1: 
  Overall diagnostic result: PASS
  Diagnostic level at card bootup: bypass
  Test results: (. = Pass, F = Fail, U = Untested)
    1) supervisor-bootup -----------------------> U
    2) packet-memory-bootup --------------------> U
    3) packet-memory-ongoing -------------------> U
module 4: 
  Overall diagnostic result: PASS
  Diagnostic level at card bootup: minimal
  Test results: (. = Pass, F = Fail, U = Untested)
    1) linecard-online-diag --------------------> .
module 5: 
  Overall diagnostic result: PASS
  Diagnostic level at card bootup: minimal
  Test results: (. = Pass, F = Fail, U = Untested)
    1) linecard-online-diag --------------------> .
module 6: 
  Overall diagnostic result: PASS
  Diagnostic level at card bootup: minimal
  Test results: (. = Pass, F = Fail, U = Untested)
    1) linecard-online-diag --------------------> .
This example shows how to display online diagnostics for module 1:
Switch# show diagnostic result module 1 detail
Current bootup diagnostic level: minimal
module 1:
 Overall diagnostic result: PASS
 Diagnostic level at card bootup: minimal
 Test results: (. = Pass, F = Fail, U = Untested)
___________________________________________________________________________
   1) supervisor-bootup -----------------------> .
         Error code --------------------------> 0 (DIAG_SUCCESS)
         Total run count ---------------------> 0
         Last test execution time ------------> n/a
         First test failure time -------------> n/a
         Last test failure time --------------> n/a
         Last test pass time -----------------> n/a
         Total failure count -----------------> 0
         Consecutive failure count -----------> 0
Power-On-Self-Test Results for ACTIVE Supervisor
Power-on-self-test for Module 1:  WS-X4014
Port/Test Status: (. = Pass, F = Fail)
Reset Reason: PowerUp Software/User
Port Traffic: L2 Serdes Loopback ...
0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .
12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .
24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: .
Port Traffic: L2 Asic Loopback ...
0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .
12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .
24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: .
Port Traffic: L3 Asic Loopback ...
0: .  1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: .
12: . 13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: .
24: . 25: . 26: . 27: . 28: . 29: . 30: . 31: . au: .
Switch Subsystem Memory ...
1: .  2: .  3: .  4: .  5: .  6: .  7: .  8: .  9: . 10: . 11: . 12: .
13: . 14: . 15: . 16: . 17: . 18: . 19: . 20: . 21: . 22: . 23: . 24: .
25: . 26: . 27: . 28: . 29: . 30: . 31: . 32: . 33: . 34: . 35: . 36: .
37: . 38: . 39: . 40: . 41: . 42: . 43: . 44: . 45: . 46: . 47: . 48: .
49: . 50: . 51: . 52: . 53: . 54: .
Module 1 Passed
___________________________________________________________________________
   2) packet-memory-bootup --------------------> .
         Error code --------------------------> 0 (DIAG_SUCCESS)
         Total run count ---------------------> 0
         Last test execution time ------------> n/a
         First test failure time -------------> n/a
         Last test failure time --------------> n/a
         Last test pass time -----------------> n/a
         Total failure count -----------------> 0
         Consecutive failure count -----------> 0
packet buffers on free list: 64557 bad: 0 used for ongoing tests: 979
Number of errors found: 0
Cells with hard errors (failed two or more tests): 0
Cells with soft errors (failed one test, includes hard): 0
Suspect bad cells (uses a block that tested bad): 0
total buffers: 65536
bad buffers: 0 (0.0%)
good buffers: 65536 (100.0%)
Bootup test results:1
No  errors.
___________________________________________________________________________
   3) packet-memory-ongoing -------------------> U
         Error code --------------------------> 0 (DIAG_SUCCESS)
         Total run count ---------------------> 0
         Last test execution time ------------> n/a
         First test failure time -------------> n/a
         Last test failure time --------------> n/a
         Last test pass time -----------------> n/a
         Total failure count -----------------> 0
         Consecutive failure count -----------> 0
packet buffers on free list: 64557 bad: 0 used for ongoing tests: 979
Packet memory errors: 0 0
Current alert level: green
Per 5 seconds in the last minute:
   0 0 0 0 0 0 0 0 0 0
   0 0
Per minute in the last hour:
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
Per hour in the last day:
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0
Per day in the last 30 days:
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
Direct memory test failures per minute in the last hour:
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
   0 0 0 0 0 0 0 0 0 0
Potential false positives: 0 0
 Ignored because of rx errors: 0 0
 Ignored because of cdm fifo overrun: 0 0
 Ignored because of oir: 0 0
 Ignored because isl frames received: 0 0
 Ignored during boot: 0 0
 Ignored after writing hw stats: 0 0
 Ignored on high gigaport: 0
Ongoing diag action mode: Normal
Last 1000 Memory Test Failures:
Last 1000 Packet Memory errors:
First 1000 Packet Memory errors:
___________________________________________________________________________
Switch#
show diagnostic result module test 2

To display the results of the bootup packet memory test, use the show diagnostic result module test 2 command. The output indicates whether the test passed, failed, or was not run.

show diagnostic result module N test 2 [detail]
Syntax Description

N

Specifies the module number.

detail

(Optional) Specifies the display of detailed information for analysis.

Defaults

Non-detailed results

Command Modes

EXEC mode

Command History

Release

Modification

12.2(18)EW

This command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

The detail keyword is intended for use by Cisco support personnel when analyzing failures.

Examples

This example shows how to display the results of the bootup packet memory tests:
Switch# show diagnostic result module 1 test 2
Test results: (. = Pass, F = Fail, U = Untested)
    2) packet-memory-bootup ------------> .
This example shows how to display detailed results from the bootup packet memory tests:
Switch# show diagnostic result module 2 test 2 detail
Test results: (. = Pass, F = Fail, U = Untested)
___________________________________________________________________________
    2) packet-memory-bootup ------------> .
          Error code ------------------> 0 (DIAG_SUCCESS)
          Total run count -------------> 0
          Last test execution time ----> n/a
          First test failure time -----> n/a
          Last test failure time ------> n/a
          Last test pass time ---------> n/a
          Total failure count ---------> 0
          Consecutive failure count ---> 0
packet buffers on free list: 64557 bad: 0 used for ongoing tests: 979
Number of errors found: 0
Cells with hard errors (failed two or more tests): 0
Cells with soft errors (failed one test, includes hard): 0
Suspect bad cells (uses a block that tested bad): 0
total buffers: 65536
bad buffers: 0 (0.0%)
good buffers: 65536 (100.0%)
Bootup test results:
No errors.
Related Commands

diagnostic monitor action
show diagnostic result module test 3

show diagnostic result module test 3

To display results from the ongoing packet memory test, use the show diagnostic result module test 3 command. The output indicates whether the test passed, failed, or was not run.

show diagnostic result module N test 3 [detail]
Syntax Description

N

Specifies the module number.

detail

(Optional) Specifies the display of detailed information for analysis.

Defaults

Non-detailed results

Command Modes

EXEC mode

Command History

Release

Modification

12.2(18)EW

This command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

The detail keyword is intended for use by Cisco support personnel when analyzing failures.

Examples

This example shows how to display results from the ongoing packet memory tests:
Switch# show diagnostic result module 1 test 3
Test results: (. = Pass, F = Fail, U = Untested)
    3) packet-memory-ongoing -----------> .
This example shows how to display detailed results from the ongoing packet memory tests:
Switch# show diagnostic result module 1 test 3 detail
Test results: (. = Pass, F = Fail, U = Untested)
___________________________________________________________________________
    3) packet-memory-ongoing -----------> .
          Error code ------------------> 0 (DIAG_SUCCESS)
          Total run count -------------> 0
          Last test execution time ----> n/a
          First test failure time -----> n/a
          Last test failure time ------> n/a
          Last test pass time ---------> n/a
          Total failure count ---------> 0
          Consecutive failure count ---> 0
packet buffers on free list: 64557 bad: 0 used for ongoing tests: 979
Packet memory errors: 0 0
Current alert level: green
Per 5 seconds in the last minute: 
    0 0 0 0 0 0 0 0 0 0 
    0 0 
Per minute in the last hour: 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
Per hour in the last day: 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 
Per day in the last 30 days: 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
Direct memory test failures per minute in the last hour: 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
    0 0 0 0 0 0 0 0 0 0 
Potential false positives: 0 0
  Ignored because of rx errors: 0 0
  Ignored because of cdm fifo overrun: 0 0
  Ignored because of oir: 0 0
  Ignored because isl frames received: 0 0
  Ignored during boot: 0 0
  Ignored after writing hw stats: 0 0
  Ignored on high gigaport: 0
Ongoing diag action mode: Normal
Last 1000 Memory Test Failures: v
Last 1000 Packet Memory errors:
First 1000 Packet Memory errors:
Related Commands

diagnostic monitor action
show diagnostic result module test 2

show dot1x

To display 802.1X statistics and operational status for the entire switch or for a specified interface, use the show dot1x command.

show dot1x [interface interface-id] | [statistics [interface interface-id]] | [all]
Syntax Description

interface interface-id

(Optional) Displays the 802.1X status for the specified port.

statistics

(Optional) Displays 802.1X statistics for the switch or the specified interface.

all

(Optional) Displays per-interface 802.1X configuration information for all interfaces with a non-default 802.1X configuration.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(12c)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Display enhanced to show the guest-VLAN value.

Usage Guidelines

If you do not specify an interface, global parameters and a summary are displayed. If you specify an interface, details for that interface are displayed.

If you specify the statistics keyword without the interface interface-id option, statistics are displayed for all interfaces. If you specify the statistics keyword with the interface interface-id option, statistics are displayed for the specified interface.

Expressions are case sensitive. For example, if you enter exclude output, the lines that contain output are not displayed, but the lines that contain Output are displayed.

Examples

This is an example of output from the show dot1x privileged EXEC command:
Switch# show dot1x
Sysauthcontrol = Disabled
Dot1x Protocol Version = 1
Dot1x Oper Controlled Directions = Both
Dot1x Admin Controlled Directions = Both
Switch# 
This example shows how to display 802.1x statististics for a specific port:
Switch# show dot1x interface fastethernet3/2
AuthSM State      = AUTHENTICATED(GUEST_VLAN)
BendSM State      = IDLE
PortStatus        = AUTHORIZED
MaxReq            = 2 
MultiHosts        = Disabled 
Port Control      = Auto
QuietPeriod       = 60 Seconds 
Re-authentication = Disabled 
ReAuthPeriod      = 3600 Seconds
ServerTimeout     = 30 Seconds 
SuppTimeout       = 30 Seconds 
TxPeriod          = 30 Seconds 
Guest-Vlan        = 91 
Switch# 
Note Table 2-12 provides a partial list of the displayed fields. The remaining fields in the display show internal state information. For a detailed description of these state machines and their settings, refer to the IEEE 802.1X specification.

Table 2-12 show dot1x interface Field Description

Field

Description

PortStatus

Status of the port (authorized or unauthorized). The status of a port is displayed as authorized if the dot1x port-control interface configuration command is set to auto and has successfully completed authentication.

Port Control

Setting of the dot1x port-control interface configuration command.

MultiHosts

Setting of the dot1x multiple-hosts interface configuration command (allowed or disallowed).

This is an example of output from the show dot1x statistics interface gigabitethernet1/1 command. Table 2-13 describes the fields in the display.
Switch# show dot1x statistics interface gigabitethernet1/1
PortStatistics Parameters for Dot1x 
--------------------------------------------
TxReqId = 0    TxReq = 0     TxTotal = 0 
RxStart = 0    RxLogoff = 0  RxRespId = 0  RxResp = 0
RxInvalid = 0  RxLenErr = 0  RxTotal= 0
RxVersion = 0  LastRxSrcMac 0000.0000.0000 
Switch# 
Table 2-13 show dot1x statistics Field Descriptions

Field

Description

TxReq/TxReqId

Number of EAP-request/identity frames that have been sent.

TxTotal

Number of EAPOL frames of any type that have been sent.

RxStart

Number of valid EAPOL-start frames that have been received.

RxLogoff

Number of EAPOL-logoff frames that have been received.

RxRespId

Number of EAP-response/identity frames that have been received.

RxResp

Number of valid EAP-response frames (other than response/identity frames) that have been received.

RxInvalid

Number of EAPOL frames that have been received and have an unrecognized frame type.

RxLenError

Number of EAPOL frames that have been received in which the packet body length field is invalid.

RxTotal

Number of valid EAPOL frames of any type that have been received.

RxVersion

Protocol version number carried in the most recently received EAPOL frame.

LastRxSrcMac

Source MAC address carried in the most recently received EAPOL frame.

Related Commands

dot1x guest-vlan
dot1x max-reauth-req
dot1x port-control

show environment

To display environment alarm, operational status, and the current reading for the chassis, use the show environment command.

show environment [alarm] | [status [chassis | fantray | powersupply | supervisor]] | [temperature]
Syntax Description

alarm

(Optional) Specifies alarm status of the chassis.

status

(Optional) Specifies operational status information.

chassis

(Optional) Specifies operational status of the chassis.

fantray

(Optional) Specifies status of the fan tray, and shows fan tray power consumption.

powersupply

(Optional) Specifies status of the power supply.

supervisor

(Optional) Specifies status of the supervisor engine.

temperature

(Optional) Specifies current chassis temperature readings.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(12c)EW

Support for the ability to display generic environment information with the show environment command was added.

Examples

This example shows how to display information about environment alarms, operational status, and the current temperature readings for the chassis:
Switch# show environment
no alarm
Chassis Temperature                    = 32 degrees Celsius
Chassis Over Temperature Threshold     = 75 degrees Celsius
Chassis Critical Temperature Threshold = 95 degrees Celsius
Power                               Fan
Supply  Model No         Type       Status       Sensor
------  ---------------  ---------  -----------  ------
PS1     PWR-C45-1400AC   AC 1400W   good         good
PS2     none             --         --           --
Power Supply    Max     Min     Max     Min     Absolute
(Nos in Watts)  Inline  Inline  System  System  Maximum
--------------  ------  ------  ------  ------  --------
PS1                0       0    1360    1360    1400
PS2               --      --      --      --     --
Power supplies needed by system : 1
Chassis Type : WS-C4507R
Supervisor Led Color : Green
Fantray : good
Power consumed by Fantray : 50 Watts
This example shows how to display information about environment alarms:
Switch# show environment alarm
no alarm
Switch# 
This example shows how to display information about power supplies, chassis type, and fan trays:
Switch# show environment status
Power                                            Fan
Supply  Model No         Type       Status       Sensor
------  ---------------  ---------  -----------  ------
PS1     PWR-C45-1400AC   AC 1400W   good         good
PS2     none             --         --           --
Power Supply    Max     Min     Max     Min     Absolute
(Nos in Watts)  Inline  Inline  System  System  Maximum
--------------  ------  ------  ------  ------  --------
PS1                0       0    1360    1360    1400
PS2               --      --      --      --     --
Power supplies needed by system : 1
Chassis Type : WS-C4507R
Supervisor Led Color : Green
Fantray : good
Power consumed by Fantray : 50 Watts
Switch# 
This example shows how to display information about the chassis:
Switch# show environment status chassis
Chassis Type :WS-C4006
Switch# 
This example shows how to display information about the fan tray:
Switch# show environment status fantray
Fantray : good
Power consumed by Fantray : 50 Watts
Switch# 
This example shows how to display information about the power supply:
Switch# show environment status powersupply
Power                                        Fan
Supply  Model No         Type       Status   Sensor
------  ---------------  ---------  -------  ------
PS1     WS-X4008         AC 400W    good     good
PS2     WS-X4008         AC 400W    good     good
PS3     none             --         --       --
Switch# 
This example shows how to display information about the supervisor engine:
Switch# show environment status supervisor
Supervisor Led Color :Green
Switch# 
This example shows how to display information about the temperature of the chassis:
Switch# show environment temperature 
Chassis Temperature                    = 32 degrees Celsius
Chassis Over Temperature Threshold     = 75 degrees Celsius
Chassis Critical Temperature Threshold = 95 degrees Celsius
Switch# 
show errdisable detect

To display error disable detection status, use the show errdisable detect command.

show errdisable detect
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Display includes the status of storm control.

Examples

This example shows how to display error disable detection status:
Switch# show errdisable detect
ErrDisable Reason    Detection status
-----------------    ----------------
udld                 Enabled
bpduguard            Enabled
security-violatio    Enabled
channel-misconfig    Disabled
psecure-violation    Enabled
vmps                 Enabled
pagp-flap            Enabled
dtp-flap             Enabled
link-flap            Enabled
l2ptguard            Enabled
gbic-invalid         Enabled
dhcp-rate-limit      Enabled
unicast-flood        Enabled
storm-control        Enabled
ilpower              Enabled
arp-inspection       Enabled
Switch# 
Related Commands

errdisable detect
errdisable recovery
show interfaces status

show errdisable recovery

To display error disable recovery timer information, use the show errdisable recovery command.

show errdisable recovery
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Display includes the status of storm control.

Examples

This example shows how to display recovery timer information for error disable:
Switch# show errdisable recovery
ErrDisable Reason    Timer Status
-----------------    --------------
udld                 Disabled
bpduguard            Disabled
security-violatio    Disabled
channel-misconfig    Disabled
vmps                 Disabled
pagp-flap            Disabled
dtp-flap             Disabled
link-flap            Disabled
l2ptguard            Disabled
psecure-violation    Disabled
gbic-invalid         Disabled
dhcp-rate-limit      Disabled
unicast-flood        Disabled
storm-control        Disabled
arp-inspection       Disabled
Timer interval:30 seconds
Interfaces that will be enabled at the next timeout:
Interface    Errdisable reason    Time left(sec)
---------    -----------------    --------------
 Fa7/32          arp-inspect           13
Related Commands

errdisable detect
errdisable recovery
show interfaces status

show etherchannel

To display EtherChannel information for a channel, use the show etherchannel command.

show etherchannel [channel-group] {port-channel | brief | detail | summary | port | load-balance | protocol}
Syntax Description

channel-group

(Optional) Number of the channel group; valid values are from 1 to 64.

port-channel

Displays port channel information.

brief

Displays a summary of EtherChannel information.

detail

Displays detailed EtherChannel information.

summary

Displays a one-line summary per channel group.

port

Displays EtherChannel port information.

load-balance

Displays load-balance information.

protocol

Displays the enabled protocol.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(13)EW

Support for LACP was added to this command.

Usage Guidelines

If you do not specify a channel group, all channel groups are displayed.

In the output below, the Passive port list field is displayed for Layer 3 port channels only. This field means that the physical interface, which is still not up, is configured to be in the channel group (and indirectly is in the only port channel in the channel group).

Examples

This example shows how to display port channel information for a specific group:
Switch# show etherchannel 1 port-channel
                Port-channels in the group:
                ----------------------
Port-channel: Po1
------------
Age of the Port-channel   = 02h:35m:26s
Logical slot/port   = 10/1           Number of ports in agport = 0
GC                  = 0x00000000      HotStandBy port = null
Passive port list   = Fa5/4 Fa5/5
Port state          = Port-channel L3-Ag Ag-Not-Inuse
Ports in the Port-channel:
Index   Load   Port
-------------------
Switch# 
This example shows how to display load-balancing information:
Switch# show etherchannel load-balance 
Source XOR Destination mac address
Switch#     
This example shows how to display a summary of information for a specific group:
Switch# show etherchannel 1 brief
Group state = L3
Ports: 2   Maxports = 8
port-channels: 1 Max port-channels = 1
Switch# 
This example shows how to display detailed information for a specific group:
Switch# show etherchannel 1 detail
Group state = L3
Ports: 2   Maxports = 8
Port-channels: 1 Max Port-channels = 1
                Ports in the group:
                -------------------
Port: Fa5/4
------------
Port state    = EC-Enbld Down Not-in-Bndl Usr-Config
Channel group = 1           Mode = Desirable     Gcchange = 0
Port-channel  = null        GC   = 0x00000000    Psudo-agport = Po1
Port indx     = 0           Load = 0x00
Flags:  S - Device is sending Slow hello.  C - Device is in Consistent state.
        A - Device is in Auto mode.        P - Device learns on physical port.
Timers: H - Hello timer is running.        Q - Quit timer is running.
        S - Switching timer is running.    I - Interface timer is running.
Local information:
                                Hello    Partner  PAgP     Learning  Group
Port      Flags State   Timers  Interval Count   Priority   Method  Ifindex
Fa5/4     d     U1/S1           1s       0        128        Any      0
Age of the port in the current state: 02h:33m:14s
Port: Fa5/5
------------
Port state    = EC-Enbld Down Not-in-Bndl Usr-Config
Channel group = 1           Mode = Desirable     Gcchange = 0
Port-channel  = null        GC   = 0x00000000    Psudo-agport = Po1
Port indx     = 0           Load = 0x00
Flags:  S - Device is sending Slow hello.  C - Device is in Consistent state.
        A - Device is in Auto mode.        P - Device learns on physical port.
Timers: H - Hello timer is running.        Q - Quit timer is running.
        S - Switching timer is running.    I - Interface timer is running.
Local information:
                                Hello    Partner  PAgP     Learning  Group
Port      Flags State   Timers  Interval Count   Priority   Method  Ifindex
Fa5/5     d     U1/S1           1s       0        128        Any      0
Age of the port in the current state: 02h:33m:17s
                Port-channels in the group:
                ----------------------
Port-channel: Po1
------------
Age of the Port-channel   = 02h:33m:52s
Logical slot/port   = 10/1           Number of ports in agport = 0
GC                  = 0x00000000      HotStandBy port = null
Passive port list   = Fa5/4 Fa5/5
Port state          = Port-channel L3-Ag Ag-Not-Inuse
Ports in the Port-channel:
Index   Load   Port
-------------------
Switch#                                                             
This example shows how to display a one-line summary per channel group:
Switch# show etherchannel summary
U-in use  I-in port-channel   S-suspended   D-down  i-stand-alone  d-default
Group Port-channel  Ports
----- ------------  ----------------------------------------------------------
1     Po1(U)        Fa5/4(I)  Fa5/5(I)
2     Po2(U)        Fa5/6(I)  Fa5/7(I)
Switch#                                                             
This example shows how to display EtherChannel port information for all ports and all groups:
Switch# show etherchannel port
                Channel-group listing:
                -----------------------
Group: 1
----------
                Ports in the group:
                -------------------
Port: Fa5/4
------------
Port state    = EC-Enbld Down Not-in-Bndl Usr-Config
Channel group = 1           Mode = Desirable     Gcchange = 0
Port-channel  = null        GC   = 0x00000000    Psudo-agport = Po1
Port indx     = 0           Load = 0x00
Flags:  S - Device is sending Slow hello.  C - Device is in Consistent state.
        A - Device is in Auto mode.        P - Device learns on physical port.
Timers: H - Hello timer is running.        Q - Quit timer is running.
        S - Switching timer is running.    I - Interface timer is running.
Local information:
                                Hello    Partner  PAgP     Learning  Group
Port      Flags State   Timers  Interval Count   Priority   Method  Ifindex
Fa5/4     d     U1/S1           1s       0        128        Any      0
Age of the port in the current state: 02h:40m:35s
Port: Fa5/5
------------
Port state    = EC-Enbld Down Not-in-Bndl Usr-Config
Channel group = 1           Mode = Desirable     Gcchange = 0
Port-channel  = null        GC   = 0x00000000    Psudo-agport = Po1
Port indx     = 0           Load = 0x00
Flags:  S - Device is sending Slow hello.  C - Device is in Consistent state.
        A - Device is in Auto mode.        P - Device learns on physical port.
Timers: H - Hello timer is running.        Q - Quit timer is running.
        S - Switching timer is running.    I - Interface timer is running.
<...output truncated...> 
Switch# 
This example shows how to display the protocol enabled:
Switch# show etherchannel protocol
                Channel-group listing:
                -----------------------
Group: 12
----------
Protocol:  PAgP
Group: 24
----------
Protocol:   -  (Mode ON)
Switch# 
Related Commands

channel-group
interface port-channel

show flowcontrol

To display the per-interface status and statistics related to flow control, use the show flowcontrol command.

show flowcontrol [module slot | interface interface]
Syntax Description

module slot

(Optional) Limits the display to interfaces on a specific module.

interface interface

(Optional) Displays the status on a specific interface.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

Table 2-14 describes the fields in the show flowcontrol command output.

Table 2-14 show flowcontrol Command Output

Field

Description

Port

Module and port number.

Send-Flowcontrol-Admin

Flow-control administration. Possible settings: on indicates the local port sends flow control to the far end; off indicates the local port does not send flow control to the far end; desired indicates the local end sends flow control to the far end if the far end supports it.

Send-Flowcontrol-Oper

Flow-control operation. Possible setting: disagree indicates the two ports could not agree on a link protocol.

Receive-Flowcontrol-Admin

Flow-control administration. Possible settings: on indicates the local port requires the far end to send flow control; off indicates the local port does not allow the far end to send flow control; desired indicates the local end allows the far end to send flow control.

Receive-Flowcontrol-Oper

Flow-control operation. Possible setting: disagree indicates the two ports could not agree on a link protocol.

RxPause

Number of pause frames received.

TxPause

Number of pause frames transmitted.

Examples

This example shows how to display flow control status on all the gigabit interfaces:
Switch# show flowcontrol
Port    Send FlowControl  Receive FlowControl  RxPause TxPause
        admin    oper     admin    oper                       
-----   -------- -------- -------- --------    ------- -------
Gi1/1   desired  off      off      off         0       0      
Gi1/2   on       disagree on       on          0       0      
Gi3/1   on       on       on       on          0       0      
Gi3/2   desired  off      off      off         0       0      
Gi3/3   desired  off      off      off         0       0      
Gi3/4   off      off      on       on          0       0      
Gi3/5   desired  off      off      off         0       0      
Gi3/6   desired  off      off      off         0       0      
Switch# 
This example shows how to display the flow control status on module 1:
Switch# show flowcontrol module 1
Port    Send FlowControl  Receive FlowControl  RxPause TxPause
        admin    oper     admin    oper                       
-----   -------- -------- -------- --------    ------- -------
Gi1/1   desired  off      off      off         0       0      
Gi1/2   on       disagree on       on          0       0      
Switch# 
This example shows how to display the flow control status on interface 3/4:
Switch# show flowcontrol interface gigabitethernet 3/4
Port    Send FlowControl  Receive FlowControl  RxPause TxPause
        admin    oper     admin    oper                       
-----   -------- -------- -------- --------    ------- -------
Gi3/4   off      off      on       on          0       0      
Switch# 
Related Commands

flowcontrol
show interfaces status

show idprom

To display IDPROMs for the chassis, supervisor engine, module, power supplies, fan trays, clock module, and multiplexor (mux) buffer, use the show idprom command.

show idprom {all | chassis | module [mod] | interface int_name | supervisor | power-supply number | fan-tray}
Syntax Description

all

Displays information for all IDPROMs.

chassis

Displays information for chassis IDPROMs.

module

Displays information for module IDPROMs.

mod

(Optional) Specifies the module name.

interface int_name

Displays information for GBIC or SFP IDPROMs.

supervisor

Displays information for supervisor engine IDPROMs.

power-supply number

Displays information for power supply IDPROMs.

fan-tray

Displays information for the fan tray IDPROMs.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(12c)EW

Support for the power-supply, fan-tray, clock-module, and mux-buffer keywords was added.

12.1(13)EW

Support for interface keyword was added.

12.2(18)EW

Enhanced the show idprom interface output to include the hexadecimal display of the GBIC/SFP SEEPROM contents.

Usage Guidelines

When you enter the show idprom interface command, the output lines for Calibration type and Rx (receive) power measurement may not be displayed for all GBICs.

Examples

This example shows how to display IDPROM information for module 4:
Switch# show idprom module 4
Module 4 Idprom:
 Common Block Signature = 0xABAB
 Common Block Version = 1
 Common Block Length = 144
 Common Block Checksum = 4199
 Idprom Size = 256
 Block Count = 2
 FRU Major Type = 0x4201
 FRU Minor Type = 303
 OEM String = Cisco Systems, Inc.
 Product Number = WS-X4306
 Serial Number = 00000135
 Part Number = <tbd> 
 Hardware Revision = 0.2
 Manufacturing Bits = 0x0000
 Engineering Bits = 0x0000
 Snmp OID = 0.0.0.0.0.0.0.0
 Power Consumption = 0
 RMA Failure Code = 0 0 0 0
 Linecard Block Signature = 0x4201
 Linecard Block Version = 1
 Linecard Block Length = 24
 Linecard Block Checksum = 658
 Feature Bits = 0x0000000000000000
 Card Feature Index = 50
 MAC Base = 0010.7bab.9830
 MAC Count = 6
Switch# 
This example shows how to display IDPROM information for the GBICs on the Gigabit Ethernet interface 1/2:
Switch# show idprom interface GigabitEthernet 1/2
GBIC Serial EEPROM Contents:
Common Block:
 Identifier        = GBIC [0x1]
 Extended Id       = Not specified/compliant with defined MOD_DEF [0x0]
 Connector         = SC connector [0x1]
 Transceiver
  Speed            = Not available [0x0]
  Media            = Not available [0x0]
  Technology       = Not available [0x0]
  Link Length      = Not available [0x0]
  GE Comp Codes    = Not available [0x0]
  SONET Comp Codes = Not available [0x0]
 Encoding          = 8B10B  [0x1]
 BR, Nominal       = 1300000000 MHz
 Length(9u) in km  = GBIC does not support single mode fibre, or the length
                     must be determined from the transceiver technology.
 Length(9u)        = > 25.4 km
 Length(50u)       = GBIC does not support 50 micron multi-mode fibre, or the
                     length must be determined from the transceiver technology.
 Length(62.5u)     = GBIC does not support 62.5 micron multi-mode fibre, or
                     the length must be determined from transceiver technology.
 Length(Copper)    = GBIC does not support copper cables, or the length must
                     be determined from the transceiver technology.
 Vendor name       = CISCO-FINISAR
 Vendor OUI        = 36965
 Vendor Part No.   = FTR-0119-CSC
 Vendor Part Rev.  = B
 Wavelength        = Not available
 CC_BASE           = 0x1A
Extended ID Fields
 Options           = Loss of Signal implemented TX_FAULT signal implemented TX_DISABLE is 
implemented and disables the serial output  [0x1A]
 BR, max           = Unspecified
 BR, min           = Unspecified
 Vendor Serial No. = K1273DH
 Date code         = 030409
 Diag monitoring   = Implemented
 Calibration type  = Internal
 Rx pwr measuremnt = Optical Modulation Amplitude (OMA)
 Address change    = Required
 CC_EXT            = 0xB2
Vendor Specific ID Fields:
20944D30  29 00 02 80 22 33 38 3D C7 67 83 E8 DF 65 6A AF   )..."38=Gg^Ch_ej/
20944D40  1A 80 ED 00 00 00 00 00 00 00 00 00 38 23 3C 1B   ............8#<.
        SEEPROM contents (hex) size 128:
0x0000  01 00 01 00 00 00 00 00 00 00 00 01 0D 00 00 FF   ................
0x0010  00 00 00 00 43 49 53 43 4F 2D 46 49 4E 49 53 41   ....CISCO-FINISA
0x0020  52 20 20 20 00 00 90 65 46 54 52 2D 30 31 31 39   R   ..^PeFTR-0119
0x0030  2D 43 53 43 20 20 20 20 42 20 20 20 00 00 00 1A   -CSC    B   ....
0x0040  00 1A 00 00 4B 31 32 37 33 44 48 20 20 20 20 20   ....K1273DH
0x0050  20 20 20 20 30 33 30 34 30 39 20 20 64 00 00 B2       030409  d..2
0x0060  29 00 02 80 22 33 38 3D C7 67 83 E8 DF 65 6A AF   )..^@"38=Gg^C._ej.
0x0070  1A 80 ED 00 00 00 00 00 00 00 00 00 38 23 3C 1B   .^@m.........8#<.
Switch# 
This example shows how to display IDPROM information for the supervisor engine:
Switch# show idprom supervisor
Supervisor Idprom:
 Common Block Signature = 0xABAB
 Common Block Version = 1
 Common Block Length = 144
 Common Block Checksum = 4153
 Idprom Size = 256
 Block Count = 2
 FRU Major Type = 0x4101
 FRU Minor Type = 333
 OEM String = Cisco Systems, Inc.
 Product Number = WS-X4014
 Serial Number = JAB05320CCE
 Part Number = 73-6854-04
 Part Revision = 05
 Manufacturing Deviation String = 0
 Hardware Revision = 0.4
 Manufacturing Bits = 0x0000
 Engineering Bits = 0x0000
 Snmp OID = 0.0.0.0.0.0.0.0
 Power Consumption = 0
 RMA Failure Code = 0 0 0 0
 Supervisor Block Signature = 0x4101
 Supervisor Block Version = 1
 Supervisor Block Length = 24
 Supervisor Block Checksum = 548
 Feature Bits = 0x0000000000000000
 Card Feature Index = 95
 MAC Base = 0007.0ee5.2a44
 MAC Count = 2
Switch# 
This example shows how to display IDPROM information for the chassis:
Switch# show idprom chassis
Chassis Idprom:
 Common Block Signature = 0xABAB
 Common Block Version = 1
 Common Block Length = 144
 Common Block Checksum = 4285
 Idprom Size = 256
 Block Count = 2
 FRU Major Type = 0x4001
 FRU Minor Type = 24
 OEM String = Cisco Systems, Inc.
 Product Number = WS-C4006
 Serial Number = FOX04473737
 Part Number = 73-4289-02
 Part Revision = 02
 Manufacturing Deviation String = 0x00
 Hardware Revision = 0.2
 Manufacturing Bits = 0x0000
 Engineering Bits = 0x0000
 Snmp OID = 0.0.0.0.0.0.0.0
 Chassis Block Signature = 0x4001
 Chassis Block Version = 1
 Chassis Block Length = 22
 Chassis Block Checksum = 421
 Feature Bits = 0x0000000000000000
 MAC Base = 0004.dd42.2600
 MAC Count = 1024
Switch# 
This example shows how to display IDPROM information for power supply 1:
Switch# show idprom power-supply 1
Power Supply 0 Idprom:
 Common Block Signature = 0xABAB
 Common Block Version = 1
 Common Block Length = 144
 Common Block Checksum = 10207
 Idprom Size = 256
 Block Count = 1
 FRU Major Type = 0xAB01
 FRU Minor Type = 8224
 OEM String = Cisco Systems, Inc. 
 Product Number = WS-CAC-1440W
 Serial Number = ACP05180002
 Part Number = 34-XXXX-01
 Part Revision = A0                      
 Manufacturing Deviation String =                     
 Hardware Revision = 1.1
 Manufacturing Bits = 0x0000
 Engineering Bits = 0x3031
 Snmp OID = 9.12.3.65535.65535.65535.65535.65535
 Power Consumption = -1
 RMA Failure Code = 255 255 255 255
 Power Supply Block Signature = 0xFFFF
 PowerSupply Block Version = 255
 PowerSupply Block Length = 255
 PowerSupply Block Checksum = 65535
 Feature Bits = 0x00000000FFFFFFFF
 Current @ 110V = -1
 Current @ 220V = -1
 StackMIB OID = 65535
Switch# 
This example shows how to display IDPROM information for the fan tray:
Switch# show idprom fan-tray
Fan Tray Idprom :
 Common Block Signature = 0xABAB
 Common Block Version = 1
 Common Block Length = 144
 Common Block Checksum = 19781
 Idprom Size = 256
 Block Count = 1
 FRU Major Type = 0x4002
 FRU Minor Type = 0
 OEM String = "Cisco Systems"
 Product Number = WS-X4502-fan
 Serial Number = 
 Part Number = 
 Part Revision = 
 Manufacturing Deviation String = 
 Hardware Revision = 0.1
 Manufacturing Bits = 0xFFFF
 Engineering Bits = 0xFFFF
 Snmp OID = 65535.65535.65535.65535.65535.65535.65535.65535
 Power Consumption = -1
 RMA Failure Code = 255 255 255 255
Switch# 
show interfaces

To display traffic on a specific interface, use the show interfaces command.

show interfaces [{{FastEthernet mod/interface-number} | {GigabitEthernet mod/interface-number} | {null interface-number} | vlan vlan_id} | status}]
Syntax Description

FastEthernet mod/interface-number

(Optional) Specifies the Fast Ethernet module and interface.

GigabitEthernet mod/interface-number

(Optional) Specifies the Gigabit Ethernet module and interface.

null interface-number

(Optional) Specifies the null interface; the valid value is 0.

vlan vlan_id

(Optional) Specifies the VLAN; valid values are from 1 to 4094.

status

(Optional) Displays status information.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(12c)EW

Support for extended VLAN addresses was added.

Usage Guidelines

Statistics are collected on a per-VLAN basis for Layer 2-switched packets and Layer 3-switched packets. Statistics are available for both unicast and multicast. The Layer 3-switched packet counts are available for both ingress and egress directions. The per-VLAN statistics are updated every 5 seconds.

In some cases, you might see a difference in the duplex mode displayed between the show interfaces command and the show running-config commands. The duplex mode displayed in the show interfaces command is the actual duplex mode the interface is running. The show interfaces command shows the operating mode for an interface, while the show running-config command shows the configured mode for an interface.

If you do not enter any keywords, all counters for all modules are displayed.

Examples

This example shows how to display traffic for a specific interface:
Switch# show interfaces GigabitEthernet 2/5
GigabitEthernet9/5 is up, line protocol is up 
Hardware is C4k 1000Mb 802.3, address is 0001.64f8.3fa5 (bia 0001.64f8.3fa5)
Internet address is 172.20.20.20/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 1000 bits/sec, 2 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
L2 Switched: ucast: 8199 pkt, 1362060 bytes - mcast: 6980 pkt, 371952 bytes
L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes mcast
L3 out Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes 
300114 packets input, 27301436 bytes, 0 no buffer
Received 43458 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
15181 packets output, 1955836 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Switch# 
This example shows how to display status information for Gigabit Ethernet interface 1/2:
Switch# show interfaces Gi1/2 status
Port      Name         Status       Vlan       Duplex  Speed Type
Gi1/2                  notconnect   1            auto   1000 1000-XWDM-RXONLY
Switch# 
show interfaces capabilities

To display the interface capabilities for an interface or for all the interfaces on a switch, use the show interfaces capabilities command.

show interfaces capabilities [{module mod}]
show interfaces [interface interface-number] capabilities
Syntax Description

module mod

(Optional) Keyword and variable to display information for the specified module only.

interface

(Optional) Specifies the interface type. Valid values are fastethernet, gigabitethernet, and port-channel.

interface-number

(Optional) Specifies the port number.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

The interface-number variable designates the module and port number. Valid values for interface-number depend on the chassis and module used. For example, if you have a 48-port 10/100-Mbps Fast Ethernet RJ-21 (telco connector) switching module installed in a Catalyst 4507 chassis, valid values for the slot number are from 2 to 13 and valid values for the port number are 1 to 48.

Examples

This example shows how to display interface capabilities for a module:
Router# show interfaces capabilities module 1 
GigabitEthernet1/1
  Model:                WS-X4516-Gbic
  Type:                 Unsupported GBIC
  Speed:                1000
  Duplex:               full
  Trunk encap. type:    802.1Q,ISL
  Trunk mode:           on,off,desirable,nonegotiate
  Channel:              yes
  Broadcast suppression:percentage(0-100), hw
  Flowcontrol:          rx-(off,on,desired),tx-(off,on,desired)
  VLAN Membership:      static, dynamic
  Fast Start:           yes
  Queuing:              rx-(N/A), tx-(4q1t, Sharing/Shaping)
  CoS rewrite:          yes
  ToS rewrite:          yes
  Inline power:         no
  SPAN:                 source/destination
  UDLD                   yes
  Link Debounce:        no
  Link Debounce Time:   no
  Port Security          yes
  Dot1x                  yes
GigabitEthernet1/2
  Model:                WS-X4516-Gbic
  Type:                 Unsupported GBIC
  Speed:                1000
  Duplex:               full
  Trunk encap. type:    802.1Q,ISL
  Trunk mode:           on,off,desirable,nonegotiate
  Channel:              yes
  Broadcast suppression:percentage(0-100), hw
  Flowcontrol:          rx-(off,on,desired),tx-(off,on,desired)
  VLAN Membership:      static, dynamic
  Fast Start:           yes
  Queuing:              rx-(N/A), tx-(4q1t, Sharing/Shaping)
  CoS rewrite:          yes
  ToS rewrite:          yes
  Inline power:         no
  SPAN:                 source/destination
  UDLD                   yes
  Link Debounce:        no
  Link Debounce Time:   no
  Port Security          yes
  Dot1x                  yes
Router# 
This example shows how to display interface capabilities for interface gi1/1:
Switch# show interface gigabitetherneti1/1 capabilities
GigabitEthernet1/1
  Model:                WS-X4014-Gbic
  Type:                 No Gbic
  Speed:                1000
  Duplex:               full
  Trunk encap. type:    802.1Q,ISL
  Trunk mode:           on,off,desirable,nonegotiate
  Channel:              yes
  Broadcast suppression:percentage(0-100), hw
  Flowcontrol:          rx-(off,on,desired),tx-(off,on,desired)
  VLAN Membership:      static, dynamic
  Fast Start:           yes
  Queuing:              rx-(N/A), tx-(4q1t, Sharing/Shaping)
  CoS rewrite:          yes
  ToS rewrite:          yes
  Inline power:         no
  SPAN:                 source/destination
  UDLD:                 yes
  Link Debounce:        no
  Link Debounce Time:   no
  Port Security:        yes
  Dot1x:                yes
  MTU Supported:        jumbo frames, baby giants
Switch#
This example shows how to display interface capabilities for interface fa3/1:
Switch# show interface fastethernet3/1 capabilities
FastEthernet3/1
  Model:                WS-X4148-RJ-RJ-45
  Type:                 10/100BaseTX
  Speed:                10,100,auto
  Duplex:               half,full,auto
  Trunk encap. type:    802.1Q,ISL
  Trunk mode:           on,off,desirable,nonegotiate
  Channel:              yes
  Broadcast suppression:percentage(0-100), sw
  Flowcontrol:          rx-(none),tx-(none)
  VLAN Membership:      static, dynamic
  Fast Start:           yes
  Queuing:              rx-(N/A), tx-(4q1t, Shaping)
  CoS rewrite:          yes
  ToS rewrite:          yes
  Inline power:         no
  SPAN:                 source/destination
  UDLD:                 yes
  Link Debounce:        no
  Link Debounce Time:   no
  Port Security:        yes
  Dot1x:                yes
  MTU Supported:        no jumbo frames, baby giants
Switch#
Related Commands

show interfaces counters

show interfaces counters

To display traffic on the physical interface, use the show interfaces counters command.

show interfaces counters [all | detail | errors | storm-control | trunk] [module mod]
Syntax Description

all

(Optional) Displays all interface counters including errors, trunk, and detail.

detail

(Optional) Displays detailed interface counters.

errors

(Optional) Displays interface error counters.

storm-control

(Optional) Displays the number of packets discarded due to suppression on the interface.

trunk

(Optional) Displays interface trunk counters.

module mod

(Optional) Limits the display to interfaces on a specific module.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Support for storm control.

12.2(18)EW

Support for the display of total suppression discards.

Usage Guidelines

If you do not enter any keywords, all counters for all modules are displayed.

The display for the storm-control keyword includes suppressed multicast bytes.

Examples

This example shows how to display error counters for a specific module:
Switch# show interfaces counters errors module 1
Port        Align-Err    FCS-Err   Xmit-Err    Rcv-Err UnderSize
Gi1/1               0          0          0          0         0
Gi1/2               0          0          0          0         0
Port      Single-Col Multi-Col  Late-Col Excess-Col Carri-Sen     Runts    Giants
Gi1/1              0         0         0          0         0         0       0
Gi1/2              0         0         0          0         0         0       0
Switch# 
This example shows how to display traffic seen by a specific module:
Switch# show interfaces counters module 1
Port            InOctets   InUcastPkts   InMcastPkts   InBcastPkts
Gi1/1                  0             0             0             0
Gi1/2                  0             0             0             0
Port           OutOctets  OutUcastPkts  OutMcastPkts  OutBcastPkts
Gi1/1                  0             0             0             0
Gi1/2                  0             0             0             0
Switch# 
This example shows how to display trunk counters for a specific module:
Switch# show interfaces counters trunk module 1
Port        TrunkFramesTx  TrunkFramesRx  WrongEncap
Gi1/1                   0              0           0
Gi1/2                   0              0           0
Switch#                                                            
This example shows how to display the number of packets discarded due to suppression:
Switch# show interfaces counters storm-control
Multicast Suppression : Enabled
Port        BcastSuppLevel  TotalSuppressionDiscards
Fa5/35              10.00%               6278550
Switch#
Related Commands

show interfaces capabilities

show interfaces description

To display a description and status of an interface, use the show interfaces description command.

show interfaces [interface] description
Syntax Description

interface

(Optional) Type of interface.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display information for all interfaces:
Switch# show interfaces description
 Interface Status         Protocol Description
 PO0/0     admin down     down     First interface
 PO0/1     admin down     down     
 Gi1/1     up             up       GigE to server farm
Switch# 
Related Commands

description (refer to Cisco IOS documentation)

show interfaces link

To display how long a cable has been disconnected from an interface, use the show interfaces link command:

show interfaces link [module mod_num]
Syntax Description

module mod_num

(Optional) Limits the display to interfaces on a module.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.2(18)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

If the interface state is up, the command displays 0:00. If the interface state is down, the time (in hours, minutes, and seconds) is displayed.

Examples

This example shows how to display active link-level information:
Switch# show interfaces link
Port    Name               Down Time
Gi1/1                       00:00:00
Gi1/2                       00:00:00
Gi3/1    				          00:00:00
Gi3/2    				          00:00:00
Fa4/1                       00:00:00
Fa4/2                       00:00:00
Fa4/3                       00:00:00
Fa4/4                       00:00:00
This example shows how to display inactive link-level information:
Switch# show interfaces link
Port    Name               Down Time
Gi3/4                      1 minute 28 secs
Gi3/5                      1 minute 28 secs
Gi3/6                      1 minute 28 secs
Gi4/1                      1 minute 28 secs
In this example, the cable has been disconnected from the port for 1 minute and 28 seconds.

show interfaces mtu

To display the maximum transmission unit (MTU) size of all the physical interfaces and SVIs on the switch, use the show interfaces mtu command.

show interfaces mtu [module mod]
Syntax Description

module mod

(Optional) Limits the display to interfaces on a specific module.

Defaults

This command has no default settings.

Command Modes

EXEC

Command History

Release

Modification

12.1(13)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the MTU size for all interfaces on module 1:
Switch> show interfaces mtu module 1
Port    Name               MTU
Gi1/1                      1500
Gi1/2                      1500
Switch> 
Related Commands

mtu

show interfaces private-vlan mapping

To display PVLAN mapping information for VLAN SVIs, use the show interface private-vlan mapping command.

show interface private-vlan mapping [active]
Syntax Description

active

(Optional) Displays active interfaces only.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

This command displays SVI information only.

Examples

This example shows how to display PVLAN mapping information:
Switch# show interface private-vlan mapping
Interface Secondary VLAN Type
--------- -------------- -----------------
vlan2     301            isolated
vlan2     302            isolated
Switch# 
Related Commands

private-vlan
private-vlan mapping

show interfaces status

To display interface status or a list of interfaces in error-disabled state, use the show interfaces status command.

show interfaces status [err-disabled]
Syntax Description

err-disabled

(Optional) Displays interfaces in error-disabled state.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the status of all interfaces:
Switch# show interfaces status
Port    Name               Status     Vlan       Duplex Speed Type
Gi1/1                      disabled   routed       full  1000 missing
Gi1/2                      notconnect 1            full  1000 unknown (4)
Fa5/1                      disabled   routed       auto  auto 10/100BaseTX
Fa5/2                      disabled   routed       auto  auto 10/100BaseTX
Fa5/3                      disabled   routed       auto  auto 10/100BaseTX
Fa5/4                      disabled   routed       auto  auto 10/100BaseTX
...
Fa5/15                     disabled   routed       auto  auto 10/100BaseTX
Fa5/16                     disabled   routed       auto  auto 10/100BaseTX
Fa5/17                     disabled   routed       auto  auto 10/100BaseTX
Switch# 
This example shows how to display the status of interfaces in error-disabled state:
Switch# show interfaces status err-disabled 
Port    Name               Status       Reason
Fa9/4                      notconnect   link-flap
informational error message when the timer expires on a cause
--------------------------------------------------------------
5d04h:%PM-SP-4-ERR_RECOVER:Attempting to recover from link-flap err-disable state on Fa9/4
Switch# 
Related Commands

errdisable detect
show errdisable recovery

show interfaces switchport

To display the administrative and operational status of a switching (nonrouting) port, use the show interfaces switchport command.

show interfaces [interface-id] switchport [module mod]
Syntax Description

interface-id

(Optional) Specifies the interface ID for the physical port.

module mod

(Optional) Limits the display to interfaces on the specified module; valid values are from 1 to 6.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Support for per-interface display.

12.2(18)EW

Support for displaying the status of native VLAN tagging in the command output.

Examples

This example shows how to display switch-port information using the begin output modifier:
Switch# show interfaces switchport | include VLAN
Name: Fa5/6
Access Mode VLAN: 200 (VLAN0200)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: ALL
Switch#                                   
This example shows how to display switch-port information for module 1:
Switch# show interfaces switchport module 1
Name:Gi1/1
Switchport:Enabled
Administrative Mode:dynamic auto
Operational Mode:down
Administrative Trunking Encapsulation:negotiate
Negotiation of Trunking:On
Access Mode VLAN:1 (default)
Trunking Native Mode VLAN:1 (default)
Administrative private-vlan host-association:none
Administrative private-vlan mapping:none
Operational private-vlan:none
Trunking VLANs Enabled:ALL
Pruning VLANs Enabled:2-1001
Name:Gi1/2
Switchport:Enabled
Administrative Mode:dynamic auto
Operational Mode:down
Administrative Trunking Encapsulation:negotiate
Negotiation of Trunking:On
Access Mode VLAN:1 (default)
Trunking Native Mode VLAN:1 (default)
Administrative private-vlan host-association:none
Administrative private-vlan mapping:none
Operational private-vlan:none
Trunking VLANs Enabled:ALL
Pruning VLANs Enabled:2-1001
Switch# 
This example shows how to display the status of native VLAN tagging on the port:
Switch# show interfaces g1/2 switchport
Name: Gi1/2
Switchport: Enabled
Administrative Mode: dynamic auto
Operational Mode: static access
Administrative Trunking Encapsulation: negotiate
Operational Trunking Encapsulation: native
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Native VLAN tagging: Disabled **
Voice VLAN: none
Administrative private-vlan host-association: none 
Administrative private-vlan mapping: none 
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk private VLANs: none
Administrative private-vlan trunk Native VLAN tagging: Disabled
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Related Commands

show interfaces capabilities
show interfaces counters

show interfaces transceiver

To display diagnostic-monitoring data for all interfaces that have transceivers installed, use the show interfaces transceiver command.

show interfaces {{[int_name] transceiver {[detail]} | {transceiver [module mod] | detail [module mod]}}
Syntax Description

int_name

(Optional) Specifies an interface.

detail

(Optional) Displays the calibrated values and the A2D readouts if the readout values differ from the calibrated values. Also displays the high-alarm, high-warning, low-warning, and low-alarm thresholds.

module mod

(Optional) Limits the display to interfaces on a specific module.

Defaults

The non-interface-specific versions of the show interfaces transceiver command are enabled by default.

The interface-specific versions of these commands are enabled by default if the specified interface has a transceiver (GBIC or SFP) configured for diagnostic monitoring, and the transceiver is in a module that supports diagnostic monitoring.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(20)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.2(18)EW

Support for the calibration keyword was withdrawn.

Usage Guidelines

The show interfaces transceiver command provides useful information under the following conditions:

•At least one transceiver is installed on a chassis that is configured for diagnostic monitoring.

•The transceiver is in a module that supports diagnostic monitoring.

If you notice that alarm and warning flags have been set on a transceiver, reenter the command to confirm.

Examples

This example shows how to display diagnostic monitoring data for all interfaces with transceivers installed on the switch:
Switch# show interfaces transceiver
    If device is externally calibrated, only calibrated values are printed.
    ++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
    NA or N/A: not applicable, Tx: transmit, Rx: receive.
    mA: milliamperes, dBm: decibels (milliwatts). 
                                             Optical   Optical
             Temperature  Voltage  Current   Tx Power  Rx Power
    Port     (Celsius)    (Volts)  (mA)      (dBm)     (dBm)
    -------  -----------  -------  --------  --------  --------
    Gi1/1      48.1       3.30       0.0       8.1 ++   N/A    
    Gi1/2      33.0       3.30       1.8     -10.0     -36.9   
    Gi2/1      43.7       5.03      50.6 +   -16.7 --   N/A    
    Gi2/2      39.2       5.02      25.7       0.8      N/A 
Switch# 
Note The value for Optical Tx Power (in dBm) equals ten times log (Tx Power in mW). If the Tx Power value is 3 mW, then the Optical Tx Power value equals 10 * log (3), which equals 10 * .477 or 4.77 dBm. The Optical Rx Power value behaves similarly. If Tx Power or Rx Power is zero, then its dBm value is undefined and is shown as N/A (not applicable).

This example shows how to display detailed diagnostic monitoring data, including calibrated values, alarm and warning thresholds, A2D readouts, and alarm and warning flags. The A2D readouts are reported separately in parentheses only if they differ from the calibrated values:
Switch# show interfaces transceiver detail
    mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
    ++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
    A2D readouts (if they differ), are reported in parentheses.
    The threshold values are calibrated.
                                High Alarm  High Warn  Low Warn   Low Alarm
            Temperature         Threshold   Threshold  Threshold  Threshold
    Port     (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)
    ------- ------------------  ----------  ---------  ---------  ---------
    Gi1/1     48.1               100.0       100.0         0.0        0.0
    Gi1/2     34.9               100.0       100.0         0.0        0.0
    Gi2/1     43.5                70.0        60.0         5.0        0.0
    Gi2/2     39.1                70.0        60.0         5.0        0.0
                                High Alarm  High Warn  Low Warn   Low Alarm
             Voltage            Threshold   Threshold  Threshold  Threshold
    Port     (Volts)            (Volts)     (Volts)    (Volts)    (Volts)
    -------  ---------------    ----------  ---------  ---------  ---------
    Gi1/1    3.30                  6.50        6.50         N/A        N/A
    Gi1/2    3.30                  6.50        6.50         N/A        N/A
    Gi2/1    5.03                  5.50        5.25        4.75       4.50
    Gi2/2    5.02                  5.50        5.25        4.75       4.50
                                High Alarm  High Warn  Low Warn   Low Alarm
             Current            Threshold   Threshold  Threshold  Threshold
    Port     (milliamperes)     (mA)        (mA)       (mA)       (mA)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi1/1      0.0               130.0       130.0        N/A        N/A 
    Gi1/2      1.7               130.0       130.0        N/A        N/A 
    Gi2/1     50.6         +      60.0        40.0        10.0        5.0
    Gi2/2     25.8                60.0        40.0        10.0        5.0
             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Transmit Power     Threshold   Threshold  Threshold  Threshold
    Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi1/1      8.1         ++      8.1         8.1        N/A        N/A 
    Gi1/2     -9.8                 8.1         8.1        N/A        N/A 
    Gi2/1    -16.7 (-13.0) --      3.4         3.2        -0.3       -0.5
    Gi2/2      0.8 (  5.1)         3.4         3.2        -0.3       -0.5
             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Receive Power      Threshold   Threshold  Threshold  Threshold
    Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi1/1     N/A                  8.1         8.1        N/A        N/A 
    Gi1/2    -30.9                 8.1         8.1        N/A        N/A 
    Gi2/1     N/A  (-28.5)         5.9        -6.7       -28.5      -28.5
    Gi2/2     N/A  (-19.5)         5.9        -6.7       -28.5      -28.5
Switch# 
This example shows how to display monitoring data for the interfaces that have transceivers installed on module 2:
Switch# show interfaces transceiver module 2
    If device is externally calibrated, only calibrated values are printed.
    ++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
    NA or N/A: not applicable, Tx: transmit, Rx: receive.
    mA: milliamperes, dBm: decibels (milliwatts).
                                             Optical   Optical
             Temperature  Voltage  Current   Tx Power  Rx Power
    Port     (Celsius)    (Volts)  (mA)      (dBm)     (dBm)
    -------  -----------  -------  --------  --------  --------
    Gi2/1      43.7       5.03      50.6 +   -16.7 --   N/A    
    Gi2/2      39.2       5.02      25.7       0.8      N/A 
Switch# 
This example shows how to display detailed monitoring data for the interfaces that have transceivers installed on module 2:
Switch# show interfaces transceiver detail module 2
    mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
    ++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
    A2D readouts (if they differ), are reported in parentheses.
    The threshold values are calibrated.
                                High Alarm  High Warn  Low Warn   Low Alarm
            Temperature         Threshold   Threshold  Threshold  Threshold
    Port     (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)
    ------- ------------------  ----------  ---------  ---------  ---------
    Gi2/1     43.5                70.0        60.0         5.0        0.0
    Gi2/2     39.1                70.0        60.0         5.0        0.0
                                High Alarm  High Warn  Low Warn   Low Alarm
             Voltage            Threshold   Threshold  Threshold  Threshold
    Port     (Volts)            (Volts)     (Volts)    (Volts)    (Volts)
    -------  ---------------    ----------  ---------  ---------  ---------
    Gi2/1    5.03                  5.50        5.25        4.75       4.50
    Gi2/2    5.02                  5.50        5.25        4.75       4.50
                                High Alarm  High Warn  Low Warn   Low Alarm
             Current            Threshold   Threshold  Threshold  Threshold
    Port     (milliamperes)     (mA)        (mA)       (mA)       (mA)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi2/1     50.6         +      60.0        40.0        10.0        5.0
    Gi2/2     25.8                60.0        40.0        10.0        5.0
             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Transmit Power     Threshold   Threshold  Threshold  Threshold
    Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi2/1    -16.7 (-13.0) --      3.4         3.2        -0.3       -0.5
    Gi2/2      0.8 (  5.1)         3.4         3.2        -0.3       -0.5
             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Receive Power      Threshold   Threshold  Threshold  Threshold
    Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi2/1     N/A  (-28.5)         5.9        -6.7       -28.5      -28.5
    Gi2/2     N/A  (-19.5)         5.9        -6.7       -28.5      -28.5
Switch# 
This example shows how to display monitoring data for the transceivers on interface Gi1/2:
Switch# show interfaces g1/2 transceiver
    ITU Channel 23 (1558.98 nm),
    Transceiver is externally calibrated.
    If device is externally calibrated, only calibrated values are printed.
    ++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
    NA or N/A: not applicable, Tx: transmit, Rx: receive.
    mA: milliamperes, dBm: decibels (milliwatts).
                                             Optical   Optical
             Temperature  Voltage  Current   Tx Power  Rx Power
    Port     (Celsius)    (Volts)  (mA)      (dBm)     (dBm)
    -------  -----------  -------  --------  --------  --------
    Gi2/1      43.7       5.03      50.6 +   -16.7 --   N/A 
Switch#

This example shows how to display detailed monitoring data for the transceivers on interface Gi1/2:
Switch# show interfaces g1/2 transceiver detail
    ITU Channel 23 (1558.98 nm),
    Transceiver is externally calibrated.
    mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
    ++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
    A2D readouts (if they differ), are reported in parentheses.
    The threshold values are calibrated.
                                High Alarm  High Warn  Low Warn   Low Alarm
            Temperature         Threshold   Threshold  Threshold  Threshold
    Port     (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)
    ------- ------------------  ----------  ---------  ---------  ---------
    Gi2/1     43.5                70.0        60.0         5.0        0.0
                                High Alarm  High Warn  Low Warn   Low Alarm
             Voltage            Threshold   Threshold  Threshold  Threshold
    Port     (Volts)            (Volts)     (Volts)    (Volts)    (Volts)
    -------  ---------------    ----------  ---------  ---------  ---------
    Gi2/1    5.03                  5.50        5.25        4.75       4.50
                                High Alarm  High Warn  Low Warn   Low Alarm
             Current            Threshold   Threshold  Threshold  Threshold
    Port     (milliamperes)     (mA)        (mA)       (mA)       (mA)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi2/1     50.6         +      60.0        40.0        10.0        5.0
             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Transmit Power     Threshold   Threshold  Threshold  Threshold
    Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi2/1    -16.7 (-13.0) --      3.4         3.2        -0.3       -0.5
             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Receive Power      Threshold   Threshold  Threshold  Threshold
    Port     (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
    -------  -----------------  ----------  ---------  ---------  ---------
    Gi2/1     N/A  (-28.5)         5.9        -6.7       -28.5      -28.5
Switch# 
Related Commands

show idprom
show interfaces status

show interfaces trunk

To display port and module interface-trunk information, use the show interfaces trunk command.

show interfaces trunk [module mod]
Syntax Description

module mod

(Optional) Limits the display to interfaces on the specified module; valid values are from 1 to 6.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

If you do not specify a keyword, only information for trunking ports is displayed.

Examples

This example shows how to display interface-trunk information for module 5:
Switch# show interfaces trunk module 5
Port      Mode         Encapsulation  Status        Native vlan
Fa5/1     routed       negotiate      routed        1
Fa5/2     routed       negotiate      routed        1
Fa5/3     routed       negotiate      routed        1
Fa5/4     routed       negotiate      routed        1
Fa5/5     routed       negotiate      routed        1
Fa5/6     off          negotiate      not-trunking  10
Fa5/7     off          negotiate      not-trunking  10
Fa5/8     off          negotiate      not-trunking  1
Fa5/9     desirable    n-isl          trunking      1
Fa5/10    desirable    negotiate      not-trunking  1
Fa5/11    routed       negotiate      routed        1
Fa5/12    routed       negotiate      routed        1
...
Fa5/48    routed       negotiate      routed        1
Port      Vlans allowed on trunk
Fa5/1     none
Fa5/2     none
Fa5/3     none
Fa5/4     none
Fa5/5     none
Fa5/6     none
Fa5/7     none
Fa5/8     200
Fa5/9     1-1005
Fa5/10    none
Fa5/11    none
Fa5/12    none
Fa5/48    none
Port      Vlans allowed and active in management domain
Fa5/1     none
Fa5/2     none
Fa5/3     none
Fa5/4     none
Fa5/5     none
Fa5/6     none
Fa5/7     none
Fa5/8     200
Fa5/9     1-6,10,20,50,100,152,200,300,303-305,349-351,400,500,521,524,570,801-8
02,850,917,999,1002-1005
Fa5/10    none
Fa5/11    none
Fa5/12    none
Fa5/48    none
Port      Vlans in spanning tree forwarding state and not pruned
Fa5/1     none
Fa5/2     none
Fa5/3     none
Fa5/4     none
Fa5/5     none
Fa5/6     none
Fa5/7     none
Fa5/8     200
Fa5/9     1-6,10,20,50,100,152,200,300,303-305,349-351,400,500,521,524,570,801-8
02,850,917,999,1002-1005
Fa5/10    none
Fa5/11    none
Fa5/48    none
Switch#                       
This example shows how to display trunking information for active trunking ports:
Switch# show interfaces trunk
Port      Mode         Encapsulation  Status        Native vlan
Fa5/9     desirable    n-isl          trunking      1
Port      Vlans allowed on trunk
Fa5/9     1-1005
Port      Vlans allowed and active in management domain
Fa5/9     1-6,10,20,50,100,152,200,300,303-305,349-351,400,500,521,524,570,801-8
02,850,917,999,1002-1005
Port      Vlans in spanning tree forwarding state and not pruned
Fa5/9     1-6,10,20,50,100,152,200,300,303-305,349-351,400,500,521,524,570,801-8
02,850,917,999,1002-1005
Switch#                                                                        
show ip arp inspection

To show the status of dynamic ARP inspection for a specific range of VLANs, use the show ip arp inspection command.

show ip arp inspection {[statistics] vlan vlan-range | interfaces [interface-name]}
Syntax Description

statistics

(Optional) Displays statistics for the following types of packets that have been processed by this feature: forwarded, dropped, MAC validation failure, and IP validation failure.

vlan vlan-range

(Optional) When used with the statistics keyword, displays the statistics for the selected range of VLANs. Without the statistics keyword, displays the configuration and operating state of DAI for the selected range of VLANs.

interfaces interface-name

(Optional) Displays the trust state and the rate limit of ARP packets for the provided interface. When the interface name is not specified, the command displays the trust state and rate limit for all applicable interfaces in the system.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the statistics of packets that have been processed by DAI for
VLAN 3:
Switch# show ip arp inspection statistics vlan 3
 Vlan      Forwarded        Dropped     DHCP Drops     ACL Drops
 ----      ---------        -------     ----------     ----------
    3          31753         102407         102407              0
 Vlan   DHCP Permits    ACL Permits   Source MAC Failures
 ----   ------------    -----------   -------------------
    3          31753              0                    0
 Vlan   Dest MAC Failures   IP Validation Failures
 ----   -----------------   ----------------------
    3                  0                        0
Switch#
This example shows how to display the statistics of packets that have been processed by DAI for all active VLANs:
Switch# show ip arp inspection statistics
 Vlan      Forwarded        Dropped     DHCP Drops     ACL Drops
 ----      ---------        -------     ----------     ----------
    1              0              0              0              0
    2              0              0              0              0
    3          68322         220356         220356              0
    4              0              0              0              0
  100              0              0              0              0
  101              0              0              0              0
 1006              0              0              0              0
 1007              0              0              0              0
 Vlan   DHCP Permits    ACL Permits   Source MAC Failures
 ----   ------------    -----------   -------------------
    1              0              0                    0
    2              0              0                    0
    3          68322              0                    0
    4              0              0                    0
  100              0              0                    0
  101              0              0                    0
 1006              0              0                    0
 1007              0              0                    0
 Vlan   Dest MAC Failures   IP Validation Failures
 ----   -----------------   ----------------------
    1                  0                        0
    2                  0                        0
    3                  0                        0
    4                  0                        0
  100                  0                        0
  101                  0                        0
 1006                  0                        0
 1007                  0                        0
Switch#
This example shows how to display the configuration and operating state of DAI for VLAN 1:
Switch# show ip arp inspection vlan 1
Source Mac Validation      : Disabled
Destination Mac Validation : Disabled
IP Address Validation      : Disabled
 Vlan     Configuration    Operation   ACL Match          Static ACL
 ----     -------------    ---------   ---------          ----------
    1     Enabled          Active                        
 Vlan     ACL Logging      DHCP Logging
 ----     -----------      ------------
    1     Deny             Deny 
Switch#
This example shows how to display the trust state of interface Fa6/3:
Switch# show ip arp inspection interfaces fastEthernet 6/3
Interface        Trust State     Rate (pps)    Burst Interval
 ---------------  -----------     ----------    --------------
 Fa6/1            Untrusted               20                 5
Switch#
This example shows how to display the trust state of the interfaces on the switch:
Switch# show ip arp inspection interfaces
Interface        Trust State     Rate (pps)
 ---------------  -----------     ----------
 Gi1/1            Untrusted               15
 Gi1/2            Untrusted               15
 Gi3/1            Untrusted               15
 Gi3/2            Untrusted               15
 Fa3/3            Trusted               None
 Fa3/4            Untrusted               15
 Fa3/5            Untrusted               15
 Fa3/6            Untrusted               15
 Fa3/7            Untrusted               15
Switch#
Related Commands

arp access-list
clear ip arp inspection log
show ip arp inspection

show ip arp inspection log

To show the status of the log buffer, use the show ip arp inspection log command.

show ip arp inspection log
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the current contents of the log buffer before and after the buffers are cleared:
Switch# show ip arp inspection log
Total Log Buffer Size : 10
Syslog rate : 0 entries per 10 seconds.
 Interface        Vlan   Sender MAC         Sender IP        Num of Pkts
 ---------------  -----  -----------------  ---------------  -----------
Fa6/3            1     0002.0002.0002  1.1.1.2          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.3          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.4          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.5          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.6          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.7          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.8          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.9          1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.10         1(12:02:52 UTC Fri Apr 25 2003)
Fa6/3            1     0002.0002.0002  1.1.1.11         1(12:02:52 UTC Fri Apr 25 2003)
    --            --         --               --        5(12:02:52 UTC Fri Apr 25 2003)
Switch#
This example shows how to clear the buffer with the clear ip arp inspection log command:
Switch# clear ip arp inspection log 
Switch# show ip arp inspection log 
Total Log Buffer Size : 10
Syslog rate : 0 entries per 10 seconds.
No entries in log buffer.
Switch#
Related Commands

arp access-list
clear ip arp inspection log

show ip cef vlan

To view IP CEF VLAN interface status and configuration information and display the prefixes for a specific interface, use the show ip cef vlan command.

show ip cef vlan vlan_num [detail]
Syntax Description

vlan_num

Number of the VLAN.

detail

(Optional) Displays detailed information.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the prefixes for a specific VLAN:
Switch# show ip cef vlan 1003
Prefix              Next Hop             Interface
0.0.0.0/0           172.20.52.1          FastEthernet3/3
0.0.0.0/32          receive
10.7.0.0/16         172.20.52.1          FastEthernet3/3
10.16.18.0/23       172.20.52.1          FastEthernet3/3
Switch# 
This example shows how to display detailed IP CEF information for a specific VLAN:
Switch# show ip cef vlan 1003 detail
IP Distributed CEF with switching (Table Version 2364), flags=0x0
  1383 routes, 0 reresolve, 0 unresolved (0 old, 0 new)
  1383 leaves, 201 nodes, 380532 bytes, 2372 inserts, 989 invalidations
  0 load sharing elements, 0 bytes, 0 references
  universal per-destination load sharing algorithm, id 9B6C9823
  3 CEF resets, 0 revisions of existing leaves
  refcounts:  54276 leaf, 51712 node
Adjacency Table has 5 adjacencies
Switch# 
show ip dhcp snooping

To display the DHCP snooping configuration, use the show ip dhcp snooping command.

show ip dhcp snooping
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(12c)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display the DHCP snooping configuration:
Switch# show ip dhcp snooping 
Switch DHCP snooping is enabled 
DHCP snooping is configured on following VLANs: 
5 10 
Insertion of option 82 is enabled 
Interface                Trusted     Rate limit (pps) 
--------------------     -------     ---------------- 
FastEthernet6/11         no          10 
FastEthernet6/36         yes         50 
Switch# 
Related Commands

ip dhcp snooping
ip dhcp snooping information option
ip dhcp snooping limit rate
ip dhcp snooping trust
ip dhcp snooping vlan

show ip dhcp snooping binding

To display DHCP snooping binding entries, use the show ip dhcp snooping binding command.

show ip dhcp snooping binding [ip-address] [mac-address] [vlan vlan_num]
[interface interface_num]
Syntax Description

ip-address

(Optional) Specifies the binding entries IP address.

mac-address

(Optional) Specifies the binding entries MAC address.

vlan vlan_num

(Optional) Specifies a VLAN.

interface interface_num

(Optional) Specifies an interface.

Defaults

If no argument is specified the switch will display the entire DHCP snooping binding table.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(12c)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

DHCP snooping is enabled on a VLAN only if both the global snooping and the VLAN snooping are enabled.

To configure a range of VLANs, use the optional last_vlan variable to specify the end of the VLAN range.

Examples

This example shows how to display the DHCP snooping binding entries for a switch:
Switch# show ip dhcp snooping binding 
MacAddress      IP Address     Lease (seconds)     Type               VLAN     Interface 
-----------     -----------    ----------------    -------------      -----    ------------ 
0000.0100.0201   10.0.0.1         1600                 dhcp-snooping       100       FastEthernet3/1
Switch# 
This example shows how to display a DHCP snooping binding entries IP address:
Switch# show ip dhcp snooping binding 172.100.101.102
MacAddress      IP Address       Lease (seconds)     Type               VLAN     Interface 
-----------     -----------      ----------------    -------------      -----    ------------ 
0000.0100.0201    172.100.101.102   1600                 dhcp-snooping       100       FastEthernet3/1
Switch# 
This example shows how to display the DHCP snooping binding entries MAC address:
Switch# show ip dhcp snooping binding 55.5.5.2 0002.b33f.3d5f 
MacAddress          IpAddress        Lease(sec)  Type               VLAN  Interface 
------------------  ---------------  ----------  -------------      ----  -------------------- 
00:02:B3:3F:3D:5F   55.5.5.2         492         dhcp-snooping       99 FastEthernet6/36 
Switch# 
This example shows how to display the DHCP snooping binding entries MAC address for a specific VLAN:
Switch# show ip dhcp snooping binding 55.5.5.2 0002.b33f.3d5f vlan 99 
MacAddress          IpAddress        Lease(sec)  Type                VLAN  Interface 
------------------  ---------------  ----------  -------------       ----  -------------------- 
00:02:B3:3F:3D:5F   55.5.5.2         479         dhcp-snooping       99    FastEthernet6/36 
Switch# 
This example shows how to display dynamic DHCP snooping binding entries:
Switch# show ip dhcp snooping binding dynamic
MacAddress      IP Address     Lease (seconds)      Type              VLAN     Interface 
-----------     -----------    ----------------     ------------      -----    ------------ 
0000.0100.0201   10.0.0.1         1600                 dhcp-snooping       100       FastEthernet3/1
Switch# 
This example shows how to display DHCP snooping binding entries on VLAN 100:
Switch# show ip dhcp snooping binding vlan 100'
MacAddress      IP Address     Lease (seconds)     Type              VLAN     Interface 
-----------     -----------    ----------------    ------------      -----    ------------ 
0000.0100.0201   10.0.0.1         1600                dhcp-snooping       100       FastEthernet3/1
Switch# 
This example shows how to display DHCP snooping binding entries on Ethernet interface 0/1:
Switch# show ip dhcp snooping binding interface FastEthernet3/1
MacAddress      IP Address     Lease (seconds)     Type              VLAN     Interface 
-----------     -----------    ----------------    ------------      -----    ------------ 
0000.0100.0201   10.0.0.1         1600                dhcp-snooping       100       FastEthernet3/1
Switch# 
Table 2-15 describes the fields in the show ip dhcp snooping command output.

Table 2-15 show ip dhcp snooping Command Output

Field

Description

Mac Address

Client hardware MAC address

IP Address

Client IP address assigned from the DHCP server

Lease (seconds)

IP address lease time

Type

Binding type; statically configured from CLI or dynamically learned

VLAN

VLAN number of the client interface

Interface

Interface that connects to the DHCP client host

Related Commands

ip dhcp snooping information option
ip dhcp snooping limit rate
ip dhcp snooping trust
ip igmp snooping
ip igmp snooping vlan

show ip dhcp snooping database

To display the status of DHCP snooping database agent, use the show ip dhcp snooping database command.

show ip dhcp snooping database [detail]
Syntax Description

detail

(Optional) Provides additional operating state and statistics information.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(12c)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Added support of state and statistics information.

Examples

This example shows how to display the DHCP snooping database:
Switch# show ip dhcp snooping database
Agent URL : 
Write delay Timer : 300 seconds
Abort Timer : 300 seconds
Agent Running : No
Delay Timer Expiry : Not Running
Abort Timer Expiry : Not Running
Last Succeded Time : None
Last Failed Time : None
Last Failed Reason : No failure recorded.
Total Attempts       :        0   Startup Failures :        0
Successful Transfers :        0   Failed Transfers :        0
Successful Reads     :        0   Failed Reads     :        0
Successful Writes    :        0   Failed Writes    :        0
Media Failures       :        0
Switch#
This example shows how to view additional operating statistics:
Switch# show ip dhcp snooping database detail 
Agent URL : tftp://10.1.1.1/directory/file
Write delay Timer : 300 seconds
Abort Timer : 300 seconds
Agent Running : No
Delay Timer Expiry : 7 (00:00:07)
Abort Timer Expiry : Not Running
Last Succeded Time : None
Last Failed Time : 17:14:25 UTC Sat Jul 7 2001
Last Failed Reason : Unable to access URL.
Total Attempts       :       21   Startup Failures :        0
Successful Transfers :        0   Failed Transfers :       21
Successful Reads     :        0   Failed Reads     :        0
Successful Writes    :        0   Failed Writes    :       21
Media Failures       :        0
First successful access: Read
Last ignored bindings counters :
Binding Collisions    :        0   Expired leases    :        0
Invalid interfaces    :        0   Unsupported vlans :        0
Parse failures        :        0
Last Ignored Time : None
Total ignored bindings counters:
Binding Collisions    :        0   Expired leases    :        0
Invalid interfaces    :        0   Unsupported vlans :        0
Parse failures        :        0
Switch#
Related Commands

ip dhcp snooping
ip dhcp snooping database
ip dhcp snooping information option
ip dhcp snooping limit rate
ip dhcp snooping trust
ip dhcp snooping vlan

show ip igmp interface

To view IP IGMP interface status and configuration information, use the show ip igmp interface command.

show ip igmp interface [FastEthernet slot/port | GigabitEthernet slot/port |
null interface-number | vlan vlan_id]
Syntax Description

FastEthernet
slot/port

(Optional) Specifies the Fast Ethernet interface and the number of the slot and port.

GigabitEthernet
slot/port

(Optional) Specifies the Gigabit Ethernet interface and the number of the slot and port; valid values are from 1 to 9.

null interface-number

(Optional) Specifies the null interface and the number of the interface; the only valid value is 0.

vlan vlan_id

(Optional) Specifies the VLAN and the number of the VLAN; valid values are from 1 to 4094.

Defaults

If you do not specify a VLAN, information for VLAN 1 is shown.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(12c)EW

Added support for extended VLAN addresses.

Usage Guidelines

If you omit the optional arguments, the show ip igmp interface command displays information about all interfaces.

Examples

This example shows how to view IGMP information for VLAN 200:
Switch# show ip igmp interface vlan 200
IGMP snooping is globally enabled
IGMP snooping is enabled on this Vlan
IGMP snooping immediate-leave is disabled on this Vlan
IGMP snooping mrouter learn mode is pim-dvmrp on this Vlan
IGMP snooping is running in IGMP-ONLY mode on this VLAN
Switch# 
Related Commands

clear ip igmp group
show ip igmp snooping mrouter

show ip igmp profile

To view all configured IGMP profiles or a specified IGMP profile, use the show ip igmp profile privileged EXEC command.

show ip igmp profile [profile number]
Syntax Description

profile number

(Optional) IGMP profile number to be displayed; valid ranges are from 1 to 4294967295.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(11b)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

If no profile number is entered, all IGMP profiles are displayed.

Examples

This example shows how to display IGMP profile 40:
Switch# show ip igmp profile 40
IGMP Profile 40
    permit
    range 233.1.1.1 233.255.255.255
Switch#
This example shows how to display all IGMP profiles:
Switch# show ip igmp profile
IGMP Profile 3
    range 230.9.9.0 230.9.9.0
IGMP Profile 4
    permit
    range 229.9.9.0 229.255.255.255
Switch# 
Related Commands

ip igmp profile

show ip igmp snooping

To display information on dynamically learned and manually configured VLAN switch interfaces, use the show ip igmp snooping command.

show ip igmp snooping [querier | groups | mrouter] [vlan vlan_id] a.b.c.d [summary | sources | hosts] [count]
Syntax Description

querier

(Optional) Specifies that the display will contain IP address and version information.

groups

(Optional) Specifies that the display will list VLAN members sorted by group IP address.

mrouter

(Optional) Specifies that the display will contain information on dynamically learned and manually configured multicast switch interfaces.

vlan vlan_id

(Optional) Specifies a VLAN; valid values are from 1 to 1001 and from 1006 to 4094.

a.b.c.d

Specifies a group or Multicast IP address.

summary

(Optional) Specifies a display of detailed information for a v2 or v3 group.

sources

(Optional) Specifies a list of the source IPs for the specified group.

hosts

(Optional) Specifies a list of the host IPs for the specified group.

count

(Optional) Specifies a display of the total number of group addresses learned by the system on a global or per-VLAN basis.

Defaults

This command has no default settings.

Command Modes

EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Support for extended addressing was added.

12.1(20)EW

Added support to display configuration state for IGMPv3 explicit host tracking.

Usage Guidelines

You can also use the show mac-address-table multicast command to display entries in the MAC address table for a VLAN that has IGMP snooping enabled.

You can display IGMP snooping information for VLAN interfaces by entering the show ip igmp snooping command.

Examples

This example shows how to display the global snooping information on the switch:
Switch# show ip igmp snooping
Global IGMP Snooping configuration:
-----------------------------------
IGMP snooping             : Enabled
IGMPv3 snooping           : Enabled
Report suppression        : Enabled
TCN solicit query         : Disabled
TCN flood query count     : 2
Vlan 1:
--------
IGMP snooping                  : Enabled
IGMPv2 immediate leave         : Disabled
Explicit host tracking         : Enabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode     : IGMP_ONLY
Vlan 2:
--------
IGMP snooping                  : Enabled
IGMPv2 immediate leave         : Disabled
Explicit host tracking         : Enabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode     : IGMP_ONLY
Switch>
This example shows how to display the snooping information on VLAN 2:
Switch# show ip igmp snooping vlan 2
Global IGMP Snooping configuration:
-----------------------------------
IGMP snooping             : Enabled
IGMPv3 snooping           : Enabled
Report suppression        : Enabled
TCN solicit query         : Disabled
TCN flood query count     : 2
Vlan 2:
--------
IGMP snooping                  : Enabled
IGMPv2 immediate leave         : Disabled
Explicit host tracking         : Enabled
Multicast router learning mode : pim-dvmrp
CGMP interoperability mode     : IGMP_ONLY
Switch>
This example shows how to display IGMP querier information for all VLANs on a switch:
Switch# show ip igmp snooping querier
Vlan      IP Address     IGMP Version        Port
---------------------------------------------------
2         10.10.10.1     v2                  Router
3         172.20.50.22   v3                  Fa3/15
Switch>
This example shows how to display IGMP querier information for VLAN 5 when running IGMPv2:
Switch# show ip igmp snooping querier vlan 5
IP address               :5.5.5.10
IGMP version             :v2
Port                     :Fa3/1
Max response time        :10s
Switch>
This example shows how to display IGMP querier information for VLAN 5 when running IGMPv3:
Switch# show ip igmp snooping querier vlan 5
IP address               :5.5.5.10
IGMP version             :v3
Port                     :Fa3/1
Max response time        :10s
Query interval           :60s
Robustness variable      :2
Switch>
This example shows how to display snooping information for a specific group:
Switch# show ip igmp snooping group
Vlan      Group          Version     Ports
---------------------------------------------------------
2         224.0.1.40     v3          Router
2         224.2.2.2      v3          Fa6/2
Switch>
This example shows how to display the group's host types and ports in VLAN 1:
Switch# show ip igmp snooping group vlan 1
Vlan      Group          Host Type     Ports
---------------------------------------------------------
1         229.2.3.4     v3          fa2/1 fa2/3
1         224.2.2.2      v3          Fa6/2
Switch>
This example shows how to display the group's host types and ports in VLAN 1:
Switch# show ip igmp snooping group vlan 10 226.6.6.7
Vlan      Group          Version     Ports
---------------------------------------------------------
10        226.6.6.7      v3          Fa7/13, Fa7/14
Switch>
This example shows how to display the current state of a group with respect to a source IP address:
Switch# show ip igmp snooping group vlan 10 226.6.6.7 sources
Source information for group 226.6.6.7:
Timers: Expired sources are deleted on next IGMP General Query
SourceIP       Expires   Uptime    Inc Hosts Exc Hosts
-------------------------------------------------------
2.0.0.1        00:03:04  00:03:48  2         0
2.0.0.2        00:03:04  00:02:07  2         0
Switch>
This example shows how to display the current state of a group with respect to a host MAC address:
Switch# show ip igmp snooping group vlan 10 226.6.6.7 hosts
IGMPv3 host information for group 226.6.6.7
Timers: Expired hosts are deleted on next IGMP General Query
Host (MAC/IP)  Filter mode    Expires   Uptime    # Sources
-------------------------------------------------------------
175.1.0.29     INCLUDE        stopped   00:00:51       2
175.2.0.30     INCLUDE        stopped   00:04:14       2
Switch>
This example shows how to display summary information for a v3 group:
Switch# show ip igmp snooping group vlan 10 226.6.6.7 summary
Group Address (Vlan 10)        : 226.6.6.7
Host type                      : v3
Member Ports                   : Fa7/13, Fa7/14
Filter mode                    : INCLUDE
Expires                        : stopped
Sources                        : 2
Reporters (Include/Exclude)    : 2/0
Switch>
This example shows how to display multicast router information for VLAN 1:
Switch# show ip igmp snooping mrouter vlan 1
vlan            ports
-----+----------------------------------------
  1          Gi1/1,Gi2/1,Fa3/48,Router
Switch#
This example shows how to display the total number of group addresses learned by the system globally:
Switch# show ip igmp snooping group count
Total number of groups:   54
Switch>
This example shows how to display the total number of group addresses learned on VLAN 5:
Switch# show ip igmp snooping group vlan 5 count
Total number of groups:   30
Switch>
Related Commands

ip igmp snooping
ip igmp snooping vlan immediate-leave
ip igmp snooping vlan mrouter
ip igmp snooping vlan static
show ip igmp interface
show ip igmp snooping mrouter
show mac-address-table multicast

show ip igmp snooping membership

To display host membership information, use the show ip igmp snooping membership command.

show ip igmp snooping membership [interface interface_num] [vlan vlan_id]
[reporter a.b.c.d] [source a.b.c.d group a.b.c.d]
Syntax Description

interface interface_num

(Optional) Displays IP address and version information of an interface.

vlan vlan_id

(Optional) Displays VLAN members sorted by group IP address of a VLAN; valid values are from 1 to 1001 and from 1006 to 4094.

reporter a.b.c.d

(Optional) Displays membership information for a specified reporter.

source a.b.c.d

(Optional) Specifies a reporter, source, or group IP address.

group a.b.c.d

(Optional) Displays all members of a channel (source, group), sorted by interface or VLAN.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(20)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

This command is valid only if explicit host tracking is enabled on the switch.

Examples

This example shows how to display host membership for interface gi4/1:
Switch# show ip igmp snooping membership interface gi4/1
#channels: 5
#hosts : 1
Source/Group 	Interface 	Reporter 		Uptime 	Last-Join	 Last-Leave
40.40.40.2/224.10.10.10 	Gi4/1 	20.20.20		.20 00:23:	37 00:06:	50 00:20:30
40.40.40.4/224.10.10.10	Gi4/1 	20.20.20		.20 00:39:	42 00:09:17 	-
Switch#
This example shows how to display host membership for VLAN 20 and group 224.10.10.10:
Switch# show ip igmp snooping membership vlan 20 source 40.40.40.2 group 224.10.10.10
#channels: 5
#hosts : 1
Source/Group 	Interface 	Reporter 		Uptime 	Last-Join	 Last-Leave
40.40.40.2/224.10.10.10 	Gi4/1 	20.20.20		.20 00:23:	37 00:06:	50 00:20:30
Switch#
This example shows how to display host membership information for VLAN 20 and to delete the explicit host tracking:
Switch# show ip igmp snooping membership vlan 20
Snooping Membership Summary for Vlan 20
------------------------------------------					
Total number of channels:5
Total number of hosts   :4
Source/Group                    Interface   Reporter            Uptime   Last-Join/
                                                                                             Last-Leave
-------------------------------------------------------------------------------------------------------
40.0.0.1/224.1.1.1               Fa7/37    0002.4ba0.a4f6  00:00:04 00:00:04 /
                                                                       			                   -
40.0.0.2/224.1.1.1               Fa7/37    0002.fd80.f770   00:00:17 00:00:17 /
                                                                      								                    -
40.0.0.3/224.1.1.1               Fa7/36    20.20.20.20       00:00:04 00:00:04 /
                                                                      								                    -
40.0.0.4/224.1.1.1               Fa7/35    20.20.20.210     00:00:17 00:00:17 /
                                                                       								                   -
40.0.0.5/224.1.1.1               Fa7/37    0002.fd80.f770   00:00:17 00:00:17 /
                                                                       								                       -
Switch# clear ip igmp snooping membership vlan 20
Switch#
Related Commands

clear ip igmp snooping membership
ip igmp snooping vlan explicit-tracking
show ip igmp snooping vlan

show ip igmp snooping mrouter

To display information on dynamically learned and manually configured multicast switch interfaces, use the show ip igmp snooping mrouter command.

show ip igmp snooping mrouter [{vlan vlan-id}]
Syntax Description

vlan vlan-id

(Optional) Specifies a VLAN; valid values are from 1 to 1001 and from 1006 to 4094.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(19)EW

Added support for extended VLAN addresses.

Usage Guidelines

You can also use the show mac-address-table multicast command to display entries in the MAC address table for a VLAN that has IGMP snooping enabled.

You can display IGMP snooping information for VLAN interfaces by entering the show ip igmp interface vlan vlan-num command.

Examples

This example shows how to display snooping information for a specific VLAN:
Switch# show ip igmp snooping mrouter vlan 1
vlan            ports
-----+----------------------------------------
  1          Gi1/1,Gi2/1,Fa3/48,Switch
Switch# 
Related Commands

ip igmp snooping vlan mrouter
show ip igmp interface
show mac-address-table multicast

show ip igmp snooping vlan

To display information on dynamically learned and manually configured VLAN switch interfaces, use the show ip igmp snooping vlan command.

show ip igmp snooping vlan vlan_num
Syntax Description

vlan_num

Number of the VLAN; valid values are from 1 to 1001 and from 1006 to 4094.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

12.1(12c)EW

Support for extended addressing was added.

Usage Guidelines

You can also use the show mac-address-table multicast command to display entries in the MAC address table for a VLAN that has IGMP snooping enabled.

Examples

This example shows how to display snooping information for a specific VLAN:
Switch# show ip igmp snooping vlan 2
vlan 2
----------
IGMP snooping is globally enabled
IGMP snooping TCN solicit query is globally enabled
IGMP snooping global TCN flood query count is 2
IGMP snooping is enabled on this Vlan
IGMP snooping immediate-leave is disabled on this Vlan
IGMP snooping mrouter learn mode is pim-dvmrp on this Vlan
IGMP snooping is running in IGMP_ONLY mode on this Vlan
Switch# 
Related Commands

ip igmp snooping
ip igmp snooping vlan immediate-leave
ip igmp snooping vlan mrouter
ip igmp snooping vlan static
show ip igmp interface
show ip igmp snooping mrouter
show mac-address-table multicast

show ip mfib

To display all active Multicast Forwarding Information Base (MFIB) routes, use the show ip mfib command.

show ip mfib [all | counters | log [n]]
Syntax Description

all

(Optional) Specifies all routes in the MFIB, including those routes that are used to accelerate fast switching but that are not necessarily in the upper-layer routing protocol table.

counters

(Optional) Specifies the counts of MFIB-related events. Only non-zero counters are shown.

log

(Optional) Specifies a log of the most recent number of MFIB-related events. The most recent event is first.

n

(Optional) Specifies the number of events.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

The MFIB table contains a set of IP multicast routes; each route in the MFIB table contains several flags that associate to the route.

The route flags indicate how a packet that matches a route is forwarded. For example, the IC flag on an MFIB route indicates that some process on the switch needs to receive a copy of the packet. The following flags are associated with MFIB routes:

•Internal Copy (IC) flag—Set on a route when a process on the switch needs to receive a copy of all packets matching the specified route.

•Signaling (S) flag—Set on a route when a switch process needs notification that a packet matching the route is received. In the expected behavior, the protocol code updates the MFIB state in response to having received a packet on a signaling interface.

•Connected (C) flag—When set on a route, the C flag has the same meaning as the S flag, except that the C flag indicates that only packets sent by directly connected hosts to the route should be signaled to a protocol process.

A route can also have a set of flags associated with one or more interfaces. For an (S,G) route, the flags on interface 1 indicate how ingress packets should be treated and whether packets matching the route should be forwarded onto interface 1. The following per-interface flags are associated with MFIB routes:

•Accepting (A)—Set on the RPF interface when a packet that arrives on the interface and that is marked as Accepting (A) is forwarded to all Forwarding (F) interfaces.

•Forwarding (F)—Used in conjunction with the A flag as described above. The set of forwarding interfaces together form a multicast olist or output interface list.

•Signaling (S)—Set on an interface when a multicast routing protocol process in Cisco IOS needs to be notified of ingress packets on that interface.

•Not Platform (NP) fast-switched—Used in conjunction with the F flag. A forwarding interface is also marked as Not Platform fast-switched whenever that output interface cannot be fast-switched by the platform hardware and requires software forwarding.

For example, the Catalyst 4006 switch with Supervisor Engine III cannot switch tunnel interfaces in hardware so these interfaces are marked with the NP flag. When an NP interface is associated with a route, a copy of every ingress packet arriving on an Accepting interface is sent to the switch software forwarding path for software replication and then forwarded to the NP interface.

Examples

This example shows how to display all active MFIB routes:
Switch# show ip mfib
IP Multicast Forwarding Information Base
Entry Flags: C - Directly Connected, S - Signal,
             IC - Internal Copy
Interface Flags: A - Accept, F - Forward, NS - Signal,
             NP - Not platform switched
Packets: Fast/Partial/Slow Bytes: Fast/Partial/Slow:
(171.69.10.13, 224.0.1.40), flags (IC)
   Packets: 2292/2292/0, Bytes: 518803/0/518803
   Vlan7 (A)
   Vlan100 (F NS)
   Vlan105 (F NS)
(*, 224.0.1.60), flags ()
   Packets: 2292/0/0, Bytes: 518803/0/0
   Vlan7 (A NS)
(*, 224.0.1.75), flags ()
   Vlan7 (A NS)
(10.34.2.92, 239.192.128.80), flags ()
   Packets: 24579/100/0, 2113788/15000/0 bytes
   Vlan7 (F NS)
   Vlan100 (A)
(*, 239.193.100.70), flags ()
   Packets: 1/0/0, 1500/0/0 bytes
   Vlan7 (A) 
Switch# 
Related Commands

clear ip mfib counters

show ip mfib fastdrop

To show all currently active fast drop entries and to show whether fast drop is enabled, use the show ip mfib fastdrop command.

show ip mfib fastdrop
Syntax Description

This command has no arguments or keywords.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display all currently active fast drop entries and whether fast drop is enabled.
Switch# show ip mfib fasttdrop 
MFIB fastdrop is enabled.
MFIB fast-dropped flows:
(10.0.0.1, 224.1.2.3, Vlan9 ) 00:01:32
(10.1.0.2, 224.1.2.3, Vlan9 ) 00:02:30
(1.2.3.4, 225.6.7.8, Vlan3) 00:01:50
Switch# 
Related Commands

clear ip mfib fastdrop

show ip mroute

To display IP multicast routing table information, use the show ip mroute command.

show ip mroute [interface_type slot/port | host_name | host_address [source] | active [kbps | interface_type num] | count | pruned | static | summary]
Syntax Description

interface_type
slot/port

(Optional) Interface type and number of the slot and port; valid values for interface type are FastEthernet, GigabitEthernet, null, and vlan.

host_name

(Optional) Name or IP address as defined in the DNS hosts table.

host_address
source

(Optional) IP address or name of a multicast source.

active

(Optional) Displays the rate that active sources are sending to multicast groups.

kbps
interface_type num

(Optional) Minimum rate at which active sources are sending to multicast groups; active sources sending at this rate or greater will be displayed. Valid values are from 1 to 4294967295 kbps.

count

(Optional) Displays route and packet count information.

pruned

(Optional) Displays pruned routes.

static

(Optional) Displays static multicast routes.

summary

(Optional) Displays a one-line, abbreviated summary of each entry in the IP multicast routing table.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(8a)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Usage Guidelines

If you omit all optional arguments and keywords, the show ip mroute command displays all entries in the IP multicast routing table.

The show ip mroute active kbps command displays all sources sending at a rate greater than or equal to kbps.

The multicast routing table is populated by creating source, group (S,G) entries from star, group (*,G) entries. The star refers to all source addresses, the "S" refers to a single source address, and the "G" is the destination multicast group address. In creating (S,G) entries, the software uses the best path to that destination group found in the unicast routing table (that is, through Reverse Path Forwarding (RPF).

Examples

This example shows how to display all entries in the IP multicast routing table:
Switch# show ip mroute
IP Multicast Routing Table
Flags:D - Dense, S - Sparse, s - SSM Group, C - Connected, L - Local,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT, M - MSDP created entry, X - Proxy Join Timer Running
       A - Advertised via MSDP, U - URD, I - Received Source Specific Host
           Report 
Outgoing interface flags:H - Hardware switched
Timers:Uptime/Expires
Interface state:Interface, Next-Hop or VCD, State/Mode
(*, 230.13.13.1), 00:16:41/00:00:00, RP 10.15.1.20, flags:SJC
  Incoming interface:GigabitEthernet4/8, RPF nbr 10.15.1.20
  Outgoing interface list:
 GigabitEthernet4/9, Forward/Sparse-Dense, 00:16:41/00:00:00, H
(*, 230.13.13.2), 00:16:41/00:00:00, RP 10.15.1.20, flags:SJC
 Incoming interface:GigabitEthernet4/8, RPF nbr 10.15.1.20, RPF-MFD
  Outgoing interface list:
    GigabitEthernet4/9, Forward/Sparse-Dense, 00:16:41/00:00:00, H
(10.20.1.15, 230.13.13.1), 00:14:31/00:01:40, flags:CJT
 Incoming interface:GigabitEthernet4/8, RPF nbr 10.15.1.20, RPF-MFD
  Outgoing interface list:
    GigabitEthernet4/9, Forward/Sparse-Dense, 00:14:31/00:00:00, H
(132.206.72.28, 224.2.136.89), 00:14:31/00:01:40, flags:CJT
  Incoming interface:GigabitEthernet4/8, RPF nbr 10.15.1.20, RPF-MFD
 Outgoing interface list:Null
Switch# 
This example shows how to display the rate that active sources are sending to multicast groups and to display only active sources sending at greater than the default rate:
Switch# show ip mroute active
Active IP Multicast Sources - sending > = 4 kbps
Group: 224.2.127.254, (sdr.cisco.com)
   Source: 146.137.28.69 (mbone.ipd.anl.gov)
     Rate: 1 pps/4 kbps(1sec), 4 kbps(last 1 secs), 4 kbps(life avg)
Group: 224.2.201.241, ACM 97
   Source: 130.129.52.160 (webcast3-e1.acm97.interop.net)
     Rate: 9 pps/93 kbps(1sec), 145 kbps(last 20 secs), 85 kbps(life avg)
Group: 224.2.207.215, ACM 97
   Source: 130.129.52.160 (webcast3-e1.acm97.interop.net)
     Rate: 3 pps/31 kbps(1sec), 63 kbps(last 19 secs), 65 kbps(life avg)
Switch# 
This example shows how to display route and packet count information:
Switch# show ip mroute count
IP Multicast Statistics
56 routes using 28552 bytes of memory
13 groups, 3.30 average sources per group
Forwarding Counts:Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per second
Other counts:Total/RPF failed/Other drops(OIF-null, rate-limit etc)
Group:224.2.136.89, Source count:1, Group pkt count:29051
  Source:132.206.72.28/32, Forwarding:29051/-278/1186/0, Other:85724/8/56665
Switch# 
This example shows how to display summary information:
Switch# show ip mroute summary
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, s - SSM Group, C - Connected, L - Local,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT, M - MSDP created entry, X - Proxy Join Timer Running
       A - Advertised via MSDP, U - URD, I - Received Source Specific Host
           Report
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
Switch# 
Table 2-16 describes the fields shown in the output.

Table 2-16 show ip mroute Field Descriptions

Field

Description

Flags:

Information about the entry.

D - Dense

Entry is operating in dense mode.

S - Sparse

Entry is operating in sparse mode.

s - SSM Group

Entry is a member of an SSM group.

C - Connected

Member of the multicast group is present on the directly connected interface.

L - Local

Switch itself is a member of the multicast group.

P - Pruned

Route has been pruned. This information is retained in case a downstream member wants to join the source.

R - Rp-bit set

Status of the (S,G) entry; is the (S,G) entry pointing toward the RP. The R - Rp-bit set is typically a prune state along the shared tree for a particular source.

F - Register flag

Status of the software; is the software registered for a multicast source.

T - SPT-bit set

Status of the packets; have the packets been received on the shortest path source tree.

J - Join SPT

For (*, G) entries, indicates that the rate of traffic flowing down the shared tree is exceeding the SPT-Threshold set for the group. (The default SPT-Threshold setting is 0 kbps.) When the J - Join SPT flag is set, the next (S,G) packet received down the shared tree triggers an (S,G) join in the direction of the source causing the switch to join the source tree.

For (S, G) entries, indicates that the entry was created because the SPT-Threshold for the group was exceeded. When the J - Join SPT flag is set for (S,G) entries, the switch monitors the traffic rate on the source tree and attempts to switch back to the shared tree for this source if the traffic rate on the source tree falls below the group's SPT-Threshold for more than one minute.

The switch measures the traffic rate on the shared tree and compares the measured rate to the group's SPT-Threshold once every second. If the traffic rate exceeds the SPT-Threshold, the J- Join SPT flag is set on the (*, G) entry until the next measurement of the traffic rate. The flag is cleared when the next packet arrives on the shared tree and a new measurement interval is started.

If the default SPT-Threshold value of 0 Kbps is used for the group, the J- Join SPT flag is always set on (*, G) entries and is never cleared. When the default SPT-Threshold value is used, the switch immediately switches to the shortest-path tree when traffic from a new source is received.

Outgoing interface flag:

Information about the outgoing entry.

H - Hardware switched

Entry is hardware switched.

Timer:

Uptime/Expires.

Interface state:

Interface, Next-Hop or VCD, State/Mode.

(*, 224.0.255.1)
(198.92.37.100/32, 224.0.255.1)

Entry in the IP multicast routing table. The entry consists of the IP address of the source switch followed by the IP address of the multicast group. An asterisk (*) in place of the source switch indicates all sources.

Entries in the first format are referred to as (*,G) or "star comma G" entries. Entries in the second format are referred to as (S,G) or "S comma G" entries. (*,G) entries are used to build (S,G) entries.

uptime

How long (in hours, minutes, and seconds) the entry has been in the IP multicast routing table.

expires

How long (in hours, minutes, and seconds) until the entry is removed from the IP multicast routing table on the outgoing interface.

RP

Address of the RP switch. For switches and access servers operating in sparse mode, this address is always 0.0.0.0.

flags:

Information about the entry.

Incoming interface

Expected interface for a multicast packet from the source. If the packet is not received on this interface, it is discarded.

RPF neighbor

IP address of the upstream switch to the source. "Tunneling" indicates that this switch is sending data to the RP encapsulated in Register packets. The hexadecimal number in parentheses indicates to which RP it is registering. Each bit indicates a different RP if multiple RPs per group are used.

DVMRP or Mroute

Status of whether the RPF information is obtained from the DVMRP routing table or the static mroutes configuration.

Outgoing interface list

Interfaces through which packets are forwarded. When the ip pim nbma-mode command is enabled on the interface, the IP address of the PIM neighbor is also displayed.

Ethernet0

Name and number of the outgoing interface.

Next hop or VCD

Next hop specifies downstream neighbor's IP address. VCD specifies the virtual circuit descriptor number. VCD0 means the group is using the static-map virtual circuit.

Forward/Dense

Status of the packets; are they forwarded on the interface if there are no restrictions due to access lists or the TTL threshold. Following the slash (/), mode in which the interface is operating (dense or sparse).

Forward/Sparse

Sparse mode interface is in forward mode.

time/time
(uptime/expiration time)

Per interface, how long (in hours, minutes, and seconds) the entry has been in the IP multicast routing table. Following the slash (/), how long (in hours, minutes, and seconds) until the entry is removed from the IP multicast routing table.

Related Commands

ip multicast-routing (refer to Cisco IOS documentation)
ip pim (refer to Cisco IOS documentation)

show ip source binding

To display IP source bindings configured on the system, use the show ip source binding EXEC command.

show ip source binding [ip-address] [mac-address] [dhcp-snooping | static] [vlan vlan-id] [interface interface-name]
Syntax Description

ip-address

(Optional) Binding IP address.

mac-address

(Optional) Binding MAC address.

dhcp-snooping

(Optional) DHCP-snooping type binding.

static

(Optional) Statically configured binding.

vlan vlan-id

(Optional) VLAN number.

interface interface-name

(Optional) Binding interface.

Defaults

Displays both static and DHCP snooping bindings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

This command was first introduced.

Usage Guidelines

The optional parameters filter the display output result.

Examples

This example shows how to display the IP source bindings:
Switch# show ip source binding
MacAddress          IpAddress        Lease(sec)  Type           VLAN  Interface 
------------------  ---------------  ----------  -------------  ----  -------------------- 
00:00:00:0A:00:0B   11.0.0.1         infinite    static         10    FastEthernet6/10 
Switch#
This example shows how to display the static IP binding entry of IP address 11.0.01:
Switch# show ip source binding 11.0.0.1 0000.000A.000B static vlan 10 interface Fa6/10
show ip source binding 11.0.0.1 0000.000A.000B static vlan 10 interface Fa6/10 
MacAddress          IpAddress        Lease(sec)  Type           VLAN  Interface 
------------------  ---------------  ----------  -------------  ----  -------------------- 
00:00:00:0A:00:0B   11.0.0.1         infinite    static         10    FastEthernet6/10 
Switch# 
Related Commands

ip source binding

show ip verify source

To display IP source guard configuration and filters on a particular interface, use the show ip verify source command.

show ip verify source [interface interface_num]
Syntax Description

interface interface_num

(Optional) Specifies an interface.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(19)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

These examples show how to display IP source guard configuration and filters on a particular interface with the show ip verify source interface command:

•The following output appears when DHCP snooping is enabled on VLAN 10-20, interface fa6/1 has IP source filter mode configured as IP, and an existing IP address binding 10.0.0.1 is on VLAN 10:
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
fa6/1      ip           active       10.0.0.1                         10
fa6/1      ip           active       deny-all                         11-20
Note The second entry shows that a default PVACL (deny all IP traffic) is installed on the port for those snooping-enabled VLANs that do not have a valid IP source binding.

•The following output appears when you enter the show ip verify source interface fa6/2 command and DHCP snooping is enabled on VLAN 10-20, interface fa6/1 has IP source filter mode configured as IP, and there is an existing IP address binding 10.0.0.1 on VLAN 10:
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
fa6/2      ip           inactive-trust-port
•The following output appears when you enter the show ip verify source interface fa6/3 command and the interface fa6/3 does not have a VLAN enabled for DHCP snooping:
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
fa6/3      ip           inactive-no-snooping-vlan
•The following output appears when you enter the show ip verify source interface fa6/4 command and the interface fa6/4 has IP source filter mode configured as IP MAC, and existing IP MAC that binds 10.0.0.2/aaaa.bbbb.cccc on VLAN 10 and 11.0.0.1/aaaa.bbbb.cccd on VLAN 11 :
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
fa6/4      ip-mac       active       10.0.0.2         aaaa.bbbb.cccc  10
fa6/4      ip-mac       active       11.0.0.1         aaaa.bbbb.cccd  11
fa6/4      ip-mac       active       deny-all         deny-all        12-20
•The following output appears when you enter the show ip verify source interface fa6/5 command and the interface fa6/5 has IP source filter mode configured as IP MAC, and existing IP MAC binding 10.0.0.3/aaaa.bbbb.ccce on vlan 10, but port security is not enabled on fa6/5:
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
fa6/5      ip-mac       active       10.0.0.3         permit-all      10
fa6/5      ip-mac       active       deny-all         permit-all      11-20
Note Enable port security first because the DHCP security MAC filter cannot apply to the port or VLAN.

•The following output appears when you enter the show ip verify source interface fa6/6 command and the interface fa6/6 does not have IP source filter mode configured:
DHCP security is not configured on the interface fa6/6.
This example shows how to display all interfaces on the switch that have DHCP snooping security enabled with the show ip verify source command.

The output is an accumulation of per-interface show CLIs:
Interface  Filter-type  Filter-mode  IP-address       Mac-address     Vlan
---------  -----------  -----------  ---------------  --------------  ---------
fa6/1      ip           active       10.0.0.1                         10
fa6/1      ip           active       deny-all                         11-20
fa6/2      ip           inactive-trust-port
fa6/3      ip           inactive-no-snooping-vlan
fa6/4      ip-mac       active       10.0.0.2         aaaa.bbbb.cccc  10
fa6/4      ip-mac       active       11.0.0.1         aaaa.bbbb.cccd  11
fa6/4      ip-mac       active       deny-all         deny-all        12-20
fa6/5      ip-mac       active       10.0.0.3         permit-all      10
fa6/5      ip-mac       active       deny-all         permit-all      11-20
Related Commands

ip dhcp snooping information option
ip dhcp snooping limit rate
ip dhcp snooping trust
ip igmp snooping
ip igmp snooping vlan
ip source binding
ip verify source vlan dhcp-snooping
show ip source binding

show ipc

To display IPC information, use the show ipc command.

show ipc {nodes | ports | queue | status}

Syntax Description

nodes

Displays participating nodes.

ports

Displays local IPC ports.

queue

Displays the contents of the IPC retransmission queue.

status

Displays the status of the local IPC server.

Defaults

This command has no default settings.

Command Modes

Privileged EXEC

Command History

Release

Modification

12.1(12c)EW

Support for this command was introduced on the Catalyst 4500 series switch.

Examples

This example shows how to display participating nodes:
Switch# show ipc nodes
There are 3 nodes in this IPC realm.
   ID     Type                 Name                       Last  Last
                                                          Sent  Heard
   10000 Local      IPC Master                               0      0     
 2010000 Local      GALIOS IPC:Card 1                        0      0     
 2020000 Ethernet   GALIOS IPC:Card 2                        12     26 
Switch#  
This example shows how to display local IPC ports:
Switch# show ipc ports
There are 11 ports defined.
Port ID        Type       Name                 (current/peak/total)
   10000.1     unicast    IPC Master:Zone                      
   10000.2     unicast    IPC Master:Echo                      
   10000.3     unicast    IPC Master:Control                   
   10000.4     unicast    Remote TTY Server Port               
   10000.5     unicast    GALIOS RF :Active                    
     index = 0  seat_id = 0x2020000  last sent = 0     heard = 1635   0/1/1635
   10000.6     unicast    GALIOS RED:Active                    
     index = 0  seat_id = 0x2020000  last sent = 0     heard = 2      0/1/2
 2020000.3     unicast    GALIOS IPC:Card 2:Control            
 2020000.4     unicast    GALIOS RFS :Standby                  
 2020000.5     unicast    Slave: Remote TTY Client Port        
 2020000.6     unicast    GALIOS RF :Standby                   
 2020000.7     unicast    GALIOS RED:Standby                   
RPC packets: current/peak/total
                                                            0/1/17
Switch# 
This example shows how to display the contents of the IPC retransmission queue:
Switch# show ipc queue
There are 0 IPC messages waiting for acknowledgement in the transmit queue.
There are 0 IPC messages waiting for a response.
There are 0 IPC messages waiting for additional fragments.
There are 0 IPC messages currently on the IPC inboundQ.
There are 0 messages currently in use by the system.
Switch# 
This example shows how to display the status of the local IPC server:
Switch# show ipc status
IPC System Status:
This processor is the IPC master server.
6000 IPC message headers in cache
3363 messages in, 1680 out, 1660 delivered to local port,
1686 acknowledgements received, 1675 sent,
0 NACKS received, 0 sent,
0 messages dropped on input, 0 messages dropped on output
0 no local port, 0 destination unknown, 0 no transport
0 missing callback or queue, 0 duplicate ACKs, 0 retries,
0 message timeouts.
0 ipc_output failures, 0 mtu failures,
0 msg alloc failed, 0 emer msg alloc failed, 0 no origs for RPC replies
0 pak alloc failed, 0 memd alloc failed
0 no hwq, 1 failed opens, 0 hardware errors
No regular dropping of IPC output packets for test purposes
Switch# 
show l2protocol-tunnel

To display information about Layer 2 protocol tunnel ports, use the show l2protocol-tunnel command. This command displays information for interfaces with protocol tunneling enabled.

show l2protocol-tunnel [interface interface-id] [[summary] | {begin | exclude | include} expression]
Syntax Description

interface interface-id

(Optional) Specifies the interface for which protocol tunneling information appears. Valid interfaces are physical ports and port channels; the port channel range is 1 to 64.

summary

(Optional) Displays only Layer 2 protocol summary information.

begin

(Optional) Displays information beginning with the line that matches the expression.

exclude

(Optional) Displays information that excludes lines that match the expression.

include

(Optional) Displays lines that match the specified expression.

expression

(Optional) Expression in the output to use as a reference point.

Command Modes

User EXEC

Command History

Release

Modification

12.2(18)EW

This command was first introduced on the Catalyst 4500 series switch.

Usage Guidelines

After enabling Layer 2 protocol tunneling on an access or 802.1Q tunnel port with the l2protocol-tunnel command, you can configure some or all of these parameters:

•Protocol type to be tunneled

•Shutdown threshold

•Drop threshold

If you enter the show l2protocol-tunnel [interface interface-id] command, only information about the active ports on which all the parameters are configured appears.

If you enter the show l2protocol-tunnel summary command, only information about the active ports on which some or all of the parameters are configured appears.

Expressions are case sensitive. For example, if you enter | exclude output, the lines that contain output do not appear, but the lines that contain Output appear.

Examples

This is an example of output from the show l2protocol-tunnel command:
Switch> show l2protocol-tunnel
COS for Encapsulated Packets: 5
Port    Protocol Shutdown  Drop      Encapsulation Decapsulation Drop
                 Threshold Threshold Counter       Counter       Counter
------- -------- --------- --------- ------------- ------------- -------------
Fa0/10  ---           ----      ----          ----          ----          ----
        stp           ----      ---- 9847          1866          0
        vtp           ----      ---- 77            12            0
        pagp          ----      ---- 859           860           0
        lacp          ----      ---- 0             0             0
        udld          ----      ---- 219           211           0
Fa0/11  cdp           1100      ---- 2356          2350          0
        stp           1100      ---- 116           13            0
        vtp           1100      ---- 3             67            0
        pagp          ----       900 856           5848          0
        lacp          ----       900 0             0             0
        udld          ----       900 0             0             0
Fa0/12  cdp           ----      ---- 2356          0             0
        stp           ----      ---- 11787         0             0
        vtp           ----      ---- 81            0             0
        pagp          ----      ---- 0             0             0
        lacp          ----      ---- 849           0             0
        udld          ----      ---- 0             0             0
Fa0/13  cdp           ----      ---- 2356          0             0
        stp           ----      ---- 11788         0             0
        vtp           ----      ---- 81            0             0
        pagp          ----      ---- 0             0             0
        lacp          ----      ---- 849           0             0
        udld          ----      ---- 0             0             0