Show Commands

This chapter describes the Cisco NX-OS IGMP snooping show commands.

show forwarding distribution ip igmp snooping

To display information about Layer 2 IGMP snooping multicast Forwarding Information Base (FIB) distribution, use the show forwarding distribution ip igmp snooping command.

show forwarding distribution ip igmp snooping [ vlan vlan-id [ group group-addr [ source source-addr ]]]

 
Syntax Description

vlan vlan-id

(Optional) Specifies a VLAN. The range is from 1 to 3967 and 4048 to 4093.

group group-addr

(Optional) Specifies a group address.

source source-addr

(Optional) Specifies a source address.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to display information about Layer 2 IGMP snooping multicast FIB distribution:

switch(config)# show forwarding distribution ip igmp snooping
 

 
Related Commands

Command
Description

test forwarding distribution perf

Tests the forwarding distribution performance of the Forwarding Information Base (FIB).

show ip igmp snooping

To display information about IGMP snooping, use the show ip igmp snooping command.

show ip igmp snooping [ vlan vlan-id ]

 
Syntax Description

vlan vlan-id

(Optional) Specifies a VLAN. The range is from 1 to 3967 and 4048 to 4093. The default is all VLANs.

 
Command Default

Displays all VLANs.

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to display information about IGMP snooping for a VLAN:

switch(config)# show ip igmp snooping vlan 20
IGMP Snooping information for vlan 20
IGMP snooping enabled
Optimised Multicast Flood (OMF) disabled
IGMP querier none
Switch-querier disabled
IGMPv3 Explicit tracking enabled
IGMPv2 Fast leave disabled
IGMPv1/v2 Report suppression enabled
IGMPv3 Report suppression disabled
Link Local Groups suppression enabled
Router port detection using PIM Hellos, IGMP Queries
Number of router-ports: 1
Number of groups: 0
Active ports:
Eth1/21 Po100
switch(config)#
 

 

show ip igmp snooping event-history

To display information in the IGMP snooping event history buffers, use the show ip igmp snooping event-history command.

show ip igmp snooping event-history { vpc | igmp-snoop-internal | mfdm | mfdm-sum | vlan | vlan-events }

 
Syntax Description

vpc

Displays the event history buffer of type virtual port channel (vPC).

igmp-snoop-
internal

Displays the event history buffer of type IGMP snooping internal.

mfdm

Displays the event history buffer of type multicast FIB distribution (MFDM).

mfdm-sum

Displays the event history buffer of type MFDM sum.

vlan

Displays the event history buffer of type VLAN.

vlan-events

Displays the event history buffer of type VLAN events.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to display information in the IGMP snooping VLAN event history buffer:

switch(config)# show ip igmp snooping event-history vlan
 
vlan Events for IGMP snoopprocess
2008 Apr 12 06:30:47.790031 igmp [4588]: : IGMPv3 proxy report: no routers found
2008 Apr 12 06:30:47.790012 igmp [4588]: : IGMPv3 proxy report: no records to se
nd
2008 Apr 12 06:30:47.789882 igmp [4588]: : IGMPv3 proxy report: no routers found
2008 Apr 12 06:30:47.789740 igmp [4588]: : IGMPv3 proxy report: no routers found
2008 Apr 12 06:30:47.789721 igmp [4588]: : IGMPv3 proxy report: no records to se
nd
2008 Apr 12 06:30:47.789584 igmp [4588]: : IGMPv3 proxy report: no routers found
2008 Apr 12 06:13:17.022028 igmp [4588]: : Received a STP Topology change notifi
cation, 1 vlans
2008 Apr 12 06:13:17.022023 igmp [4588]: : Received a STP Topology change notifi
cation
2008 Apr 12 06:13:15.022294 igmp [4588]: : Received a STP Topology change notifi
cation, 1 vlans
2008 Apr 12 06:13:15.022289 igmp [4588]: : Received a STP Topology change notifi
cation
2008 Apr 12 06:13:14.662417 igmp [4588]: : Received a STP Topology change notifi
cation, 1 vlans
2008 Apr 12 06:13:14.662412 igmp [4588]: : Received a STP Topology change notifi
cation
2008 Apr 12 06:13:12.642393 igmp [4588]: : Received a STP Topology change notifi
cation, 1 vlans
2008 Apr 12 06:13:12.642388 igmp [4588]: : Received a STP Topology change notifi
cation
2008 Apr 12 06:13:11.946051 igmp [4588]: : Received a STP Topology change notifi
cation, 1 vlans
2008 Apr 12 06:13:11.946046 igmp [4588]: : Received a STP Topology change notifi
cation
<--Output truncated-->
switch(config)#
 

 
Related Commands

Command
Description

ip igmp snooping event-history

Configures the size of the IGMP snooping event history buffers.

clear ip igmp snooping event-history

Clears information in the IGMP snooping event history buffers.

show ip igmp snooping explicit-tracking

To display information about explicit tracking for IGMP snooping, use the show ip igmp snooping explicit-tracking command.

show ip igmp snooping explicit-tracking [ vlan vlan-id ]

 
Syntax Description

vlan vlan-id

(Optional) Specifies a VLAN. The range is from 1 to 3967 and 4048 to 4093.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

When you use this command without the optional vlan argument, the system displays information for all VLANs.

This command does not require a license.

Examples

This example shows how to display information about explicit tracking for IGMP snooping for VLAN 33:

switch# show ip igmp snooping explicit-tracking vlan 33
 

 
Related Commands

Command
Description

clear ip igmp snooping explicit-tracking vlan

Clears the IGMP snooping explicit host tracking information for VLANs.

ip igmp snooping explicit-tracking

Enables tracking of IGMPv3 membership reports from individual hosts for each port on a VLAN.

show ip igmp snooping groups

To display information about the group membership for IGMP snooping, use the show ip igmp snooping groups command.

show ip igmp snooping groups [{ source [ group ]} | { group [ source ]}] [ vlan vlan-id ] [ detail ]

 
Syntax Description

source

(Optional) Source address for route.

group

(Optional) Group address for route.

vlan vlan-id

(Optional) Specifies a VLAN. The range is from 1 to 3967 and 4048 to 4093.

detail

(Optional) Displays detailed information for the group.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to display information about the group membership for IGMP snooping:

switch(config)# show ip igmp snooping groups
TType: S - Static, D - Dynamic, R - Router port
 
Vlan Group Address Ver Type Port list
20 */* - R Vlan20
switch(config)#
 

 

show ip igmp snooping mrouter

To display the multicast routers detected by IGMP snooping, 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. The range is from 1 to 3967 and 4048 to 4093.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to display the multicast routers detected by IGMP snooping:

switch(config)# show ip igmp snooping mrouter
Type: S - Static, D - Dynamic, V - vPC Peer Link
Type: S - Static, D - Dynamic, V - vPC Peer Link, I - Internal
Vlan Router-port Type Uptime Expires
20 Vlan20 I 04:16:16 never (down)
 
switch(config)#
 

 

show ip igmp snooping querier

To display information about IGMP snooping queriers, use the show ip igmp snooping querier command.

show ip igmp snooping querier [ vlan vlan-id ]

 
Syntax Description

vlan vlan-id

(Optional) Specifies a VLAN. The range is from 1 to 3967 and 4048 to 4093.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

This command does not require a license.

Examples

This example shows how to display information about IGMP snooping queriers:

switch(config)# show ip igmp snooping querier
 

 

show ip igmp snooping statistics

To display information about IGMP snooping statistics, use the show ip igmp snooping statistics command.

show ip igmp snooping statistics [ vlan vlan-id | global ]

 
Syntax Description

vlan vlan-id

(Optional) Specifies a VLAN. The range is from 1 to 3967 and 4048 to 4093.

global

(Optional) Specifies the global statistics.

 
Command Default

None

 
Command Modes

Any command mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

When you use this command without any options, the system prints statistics for all VLANs.

This command does not require a license.

Examples

This example shows how to display information about IGMP snooping statistics for VLAN 1:

switch(config)# show ip igmp snooping statistics vlan 1