C
HAPTER
39
| Multicast Filtering Commands
IGMP Filtering and Throttling
– 1227 –
COMMAND USAGE
â—† Depending on your network connections, IGMP snooping may not
always be able to locate the IGMP querier. Therefore, if the IGMP
querier is a known multicast router or switch connected over the
network to an interface (port or trunk) on this switch, that interface can
be manually configured to join all the current multicast groups.
â—† IGMP Snooping must be enabled globally on the switch (using the ip
igmp snooping command) before a multicast router port can take
effect.
EXAMPLE
The following shows how to configure port 10 as a multicast router port
within VLAN 1.
Console(config)#ip igmp snooping vlan 1 mrouter ethernet 1/10
Console(config)#
IGMP FILTERING AND THROTTLING
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.
Table 158: IGMP Filtering and Throttling Commands
Command Function Mode
ip igmp filter Enables IGMP filtering and throttling on the switch GC
ip igmp profile Sets a profile number and enters IGMP filter profile
configuration mode
GC
permit, deny Sets a profile access mode to permit or deny IPC
range Specifies one or a range of multicast addresses for a
profile
IPC
ip igmp authentication Enables RADIUS authentication for IGMP JOIN
requests.
IC
ip igmp filter Assigns an IGMP filter profile to an interface IC
ip igmp max-groups Specifies an IGMP throttling number for an interface IC
ip igmp
max-groups action
Sets the IGMP throttling action for an interface IC
ip igmp query-drop Drops any received IGMP query packets IC
ip multicast-data-drop Drops all multicast data packets IC
show ip igmp
authentication
Displays the IGMP authentication setting for interfaces PE
show ip igmp filter Displays the IGMP filtering status PE
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