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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
 
Chapter 28      Configuring IGMP Snooping and Filtering, and MVR
Displaying IGMP Snooping Information
To display multicast router interfaces, perform this task:
This example shows how to display the multicast router interfaces in VLAN 1:
Switch# show ip igmp snooping mrouter vlan 1
vlan            ports
-----+----------------------------------------
  1          Gi1/1,Gi2/1,Fa3/48,Router
Switch#
Displaying MAC Address Multicast Entries
To display MAC address multicast entries for a VLAN, perform this task:
This example shows how to display MAC address multicast entries for VLAN 1:
Switch# show mac-address-table multicast vlan 1
Multicast Entries
 vlan    mac address     type    ports
-------+---------------+-------+-------------------------------------------
   1    0100.5e01.0101     igmp Switch,Gi6/1
   1    0100.5e01.0102     igmp Switch,Gi6/1
   1    0100.5e01.0103     igmp Switch,Gi6/1
   1    0100.5e01.0104     igmp Switch,Gi6/1
   1    0100.5e01.0105     igmp Switch,Gi6/1
   1    0100.5e01.0106     igmp Switch,Gi6/1
Switch#
This example shows how to display a total count of MAC address entries for VLAN 1:
Switch# show mac-address-table multicast vlan 1 count
Multicast MAC Entries for vlan 1:    4
Switch#
Displaying IGMP Snooping Information on a VLAN Interface
To display IGMP snooping information on a VLAN, perform this task:
Command Purpose
Switch# show ip igmp snooping mrouter vlan 
vlan_ID 
Displays multicast router interfaces.
Command Purpose
Switch# show mac-address-table multicast 
vlan vlan_ID [count]
Displays MAC address multicast entries for a 
VLAN.
Command Purpose
Switch# show ip igmp snooping vlan vlan_ID 
Displays IGMP snooping information on a VLAN 
interface.