Displaying Igmp Snooping Information - Cisco WS-C3750-48PS-S Software Configuration Manual

Displaying IGMP Snooping Information

To re-enable IGMP report suppression, use the ip igmp snooping report-suppression global
configuration command.
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
Table 23-4 Commands for Displaying IGMP Snooping Information
Command
show ip igmp snooping [vlan vlan-id]
show ip igmp snooping groups [count |dynamic
[count] | user [count]]
show ip igmp snooping groups vlan vlan-id
[ip_address | count | dynamic [count] |
user[count]]
show ip igmp snooping mrouter [vlan vlan-id]
show ip igmp snooping querier [vlan vlan-id]
For more information about the keywords and options in these commands, refer to the command
reference for this release.
Catalyst 3750 Switch Software Configuration Guide
23-12
23-4.
Purpose
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.
Display multicast table information for the switch or about a specific
parameter:
•
•
•
Display multicast table information for a multicast VLAN or about a
specific parameter for the VLAN:
•
•
•
•
Display information on dynamically learned and manually configured
multicast router interfaces.
Note
(Optional) Enter vlan vlan-id to display information for a single VLAN.
Display information about the IGMP version on an interface.
(Optional) Enter vlan vlan-id to display information for a single VLAN.
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.
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.
When you enable IGMP snooping, the switch automatically
learns the interface to which a multicast router is connected.
These are dynamically learned interfaces.
Chapter 23 Configuring IGMP Snooping and MVR
78-16180-02