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Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
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Chapter 15 Configuring Multicast Services
Filtering IGMP Traffic
Configuring Port IP Multicast Filtering
IP multicast group profiles consist of one or more ranges of IP multicast addresses that are associated
with a filtering and monitoring action and are configured on a per-switch-port basis. Given a particular
profile that is associated with a switch port, you can configure the filter action as follows:
• If the filter action is to permit, the matching IGMP packet is forwarded for normal processing.
• If the filter action is to deny, the matching IGMP packet is dropped, discontinuing normal
processing.
The following sections provide switch port IP multicast filtering configurations.
Adding and Listing an IGMP Multicast Filter Profile
To add a multicast address or a range of addresses to an IGMP multicast filter profile, perform this task in
privileged mode:
This example shows how to add the multicast IP address 226.1.1.1 to IGMP multicast filter profile 1:
Console> (enable) set igmp filter profile 1 226.1.1.1
Successfully add ip(s) to profile
Console> (enable)
This example shows how to list an IP address for profile 1 when the IGMP multicast filter match-action
is denied:
Console> (enable) show igmp filter profile 1
ProfileId 1: FilterMode deny, IP Range
----------------------------------------------------
226.1.1.1
Console> (enable)
Permitting and Verifying an IGMP Multicast Filter Match-Action
To specify that an IGMP multicast filter profile on a switch permits an IP address or a range of IP
addresses, perform this task in privileged mode:
This example shows how to permit an IP address or range of IP addresses:
Console> (enable) set igmp filter profile 1 match-action permit
igmp filter match-action set to permit
Console> (enable)
Task Command
Step 1
Add a multicast IP address or a range of IP
addresses to an IGMP multicast filter profile.
set igmp filter profile profile_id ip_addr
[- ip_addr]
Step 2
List an IGMP multicast filter profile. show igmp filter profile profile_id
Task Command
Step 1
Permit an IP address or range of IP addresses. set igmp filter profile profile_id match-action
permit
Step 2
Verify the permit configuration. show igmp filter profile profile_id match-action
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