Multimedia Traffic Control with IP Multicast (IGMP)

CLI: Configuring and Displaying IGMP

Viewing the Current IGMP Configuration. This command lists the IGMP configuration for all VLANs configured on the switch or for a specific VLAN.

Syntax: show ip igmp config

IGMP configuration for all VLANs on the switch.

Syntax: show ip igmp < vid > config

IGMP configuration for a specific VLAN on the switch, including per-port data

Syntax: show ip igmp group < ip-address>

Lists the ports on which the specified multicast group IP address is registered.

(For IGMP operating status, see the appendix on monitoring and analyzing switch operation in the Management and Configuration Guide.)

For example, suppose you have the following VLAN and IGMP configurations on the switch:

VLAN ID

VLAN Name

IGMP

Forward with

Querier

 

 

Enabled

High Priority

 

 

 

 

 

 

1

DEFAULT_VLAN

Yes

No

No

22

VLAN-2

Yes

Yes

Yes

33

VLAN-3

No

No

No

 

 

 

 

 

You could use the CLI to display this data as follows:

Figure 4-1. Example Listing of IGMP Configuration for All VLANs in the Switch

The following version of the show ip igmp command includes the VLAN ID (vid) designation, and combines the above data with the IGMP per-port configuration:

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