CLI Reference Guide-R04

Chapter 25 | Multicast Filtering Commands
IGMP Filtering and Throttling
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Example
Console(config)#interface ethernet 1/1
Console(config-if)#ip igmp filter 19
Console(config-if)#
ip igmp max-groups This command sets the IGMP throttling number for an interface on the switch. Use
the no form to restore the default setting.
Syntax
ip igmp max-groups number
no ip igmp max-groups
number - The maximum number of multicast groups an interface can join at
the same time. (Range: 1-1023)
Default Setting
1023
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆ IGMP throttling sets a maximum number of multicast groups that a port can
join at the same time. When the maximum number of groups is reached on a
port, the switch can take one of two actions; either “deny” or “replace”
(see the
ip igmp max-groups action command
). If the action is set to deny, any new
IGMP join reports will be dropped. If the action is set to replace, the switch
randomly removes an existing group and replaces it with the new multicast
group.
◆ IGMP throttling can also be set on a trunk interface. When ports are configured
as trunk members, the trunk uses the throttling settings of the first port
member in the trunk.
Example
Console(config)#interface ethernet 1/1
Console(config-if)#ip igmp max-groups 10
Console(config-if)#
ip igmp max-groups
action
This command sets the IGMP throttling action for an interface on the switch. Use
the no form of the command to set the action to the default action.