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Switch(config)#ip igmp snooping
To enable IGMP Snooping globally
If host A does not hope to be added to multicast group 224.1.1.1 for some reason (for
example, the user does not receive video live data flow), you can set port filtering on the
switch as follows.
Command
Description
Switch(config)#ip igmp profile 99
To create a port filtering rule with ID as 99
Switch(config-igmp-profile)#deny
To set the filtering processing action as deny
Switch(config-igmp-profile)#range 224.1.1.1
To set the filtering address as 224.1.1.1
Switch(config-igmp-profile)#exit
To exit PROFILE mode
Switch(config)#port 0/2
To enter port 0/2
Switch(config-port-0/2)#ip igmp filter 99
To apply the filtering rule with ID as 99 on the port
After the configuration, host A sends IGMP report and wants to add multicast 224.1.1.1; the
switch filters the packet and does not add the port to the multicast forwarding table; only host
B can receive the data flow of multicast group 224.1.1.1 sent from the source, but host A
cannot.
Monitoring & Debugging
M o n i t o r i n g Co m ma n d s
Command
Description
show ip igmp snooping [vlan vlan-id]
To display the IGMP snooping configured globally or
in a VLAN
show ip igmp snooping groups [vlan
vlan-id |
count]
To display the member port information of the
multicast group or group number statistics
show ip igmp snooping mrouter [vlan vlan-id]
To display the router port information
show ip igmp snooping querier [vlan vlan-id]
To display the querier configuration
show ip igmp snooping vlan vlan-id info
To display the status information in VLAN
show ip igmp snooping egress_table
To display the uplink and report port information
show ip igmp snooping mcast_table
To display the IGMPSNOOP multicast forwarding
table
show ip igmp snooping port statistics
To display the statistics information of the number
of multicast groups to which the port is added
show ip igmp profile [profile-number]
To display the configuration information of port
filtering rule
show running-config ip igmp snooping
To display IGMPSNOOP script information
show ip igmp snooping debugging
To display IGMPSNOOP debugging status
information
M o n i t o r i n g Co m ma n d E xa mp l e s
switch#show ip igmp snooping
Displayed Result
Description and Analysis
Global IGMP Snooping configuration:
The command show ip igmp snooping is
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