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Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 22 Configuring IGMP Snooping and MVR
Displaying IGMP Snooping Information
Displaying IGMP Snooping Information
You can display IGMP snooping information for dynamically learned and statically configured router
ports and VLAN interfaces. You can also display MAC address multicast entries for a VLAN configured
for IGMP snooping.
To display IGMP snooping information, use one or more of the privileged EXEC commands in
Table 22-4.
Table 22-4 Commands for Displaying IGMP Snooping Information
Command Purpose
show ip igmp snooping [vlan vlan-id] Display the snooping configuration information for all VLANs on the
switch or for a specified VLAN.
(Optional) Enter vlan vlan-id to display information for a single VLAN.
The VLAN ID range is 1 to 1001 and 1006 to 4094.
show ip igmp snooping groups [count |dynamic
[count] | user [count]]
Display multicast table information for the switch or about a specific
parameter:
• count—Display the total number of entries for the specified
command options instead of the actual entries.
• dynamic—Display entries learned through IGMP snooping.
• user—Display only the user-configured multicast entries.
show ip igmp snooping groups vlan vlan-id
[ip_address | count | dynamic [count] |
user[count]]
Display multicast table information for a multicast VLAN or about a
specific parameter for the VLAN:
• vlan-id—The VLAN ID range is 1 to 1001 and 1006 to 4094.
• count—Display the total number of entries for the specified
command options instead of the actual entries.
• dynamic—Display entries learned through IGMP snooping.
• ip_address—Display characteristics of the multicast group with the
specified group IP address.
• user—Display only the user-configured multicast entries.
show ip igmp snooping mrouter [vlan vlan-id] Display information on dynamically learned and manually configured
multicast router interfaces.
Note When you enable IGMP snooping, the switch automatically
learns the interface to which a multicast router is connected.
These are dynamically learned interfaces.
(Optional) Enter vlan vlan-id to display information for a single VLAN.
show ip igmp snooping querier [vlan vlan-id] Display information about the IP address and receiving port for the
most-recently received IGMP query messages in the VLAN.
(Optional) Enter vlan vlan-id to display information for a single VLAN.
show ip igmp snooping querier [vlan vlan-id]
detail
Display information about the IP address and receiving port of the
most-recently received IGMP query message in the VLAN and the
configuration and operational state of the IGMP snooping querier in the
VLAN.