Multicast Filtering Commands

4-277

4

IGMP Filtering and Throttling Commands

In certain switch applications, the administrator may want to control the multicast
services that are available to end users. For example, an IP/TV service based on a
specific subscription plan. The IGMP filtering feature fulfills this requirement by
restricting access to specified multicast services on a switch port, and IGMP
throttling limits the number of simultaneous multicast groups a port can join.

ip igmp filter (Global Configuration)

This command globally enables IGMP filtering and throttling on the switch. Use the
no form to disable the feature.
Syntax
[no] ip igmp filter
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
IGMP filtering enables you to assign a profile to a switch port that specifies
multicast groups that are permitted or denied on the port. An IGMP filter profile
can contain one or more, or a range of multicast addresses; but only one
profile can be assigned to a port. When enabled, IGMP join reports received
on the port are checked against the filter profile. If a requested multicast group
is permitted, the IGMP join report is forwarded as normal. If a requested
multicast group is denied, the IGMP join report is dropped.
IGMP filtering and throttling only applies to dynamically learned multicast
groups, it does not apply to statically configured groups.
Table 4-87 IGMP Filtering and Throttling Commands
Command Function Mode Page
ip igmp filter Enables IGMP filtering and throttling on the switch GC 4-277
ip igmp profile Sets a profile number and enters IGMP filter profile
configuration mode
GC 4-278
permit, deny Sets a profile access mode to permit or deny IPC 4-278
range Specifies one or a range of multicast addresses for a profile IPC 4-279
ip igmp filter Assigns an IGMP filter profile to an interface IC 4-279
ip igmp max-groups Specifies an IGMP throttling number for an interface IC 4-280
ip igmp max-groups action Sets the IGMP throttling action for an interface IC 4-281
show ip igmp filter Displays the IGMP filtering status PE 4-281
show ip igmp profile Displays IGMP profiles and settings PE 4-282
show ip igmp throttle
interface
Displays the IGMP throttling setting for interfaces PE 4-283