IGMP F
ILTERING
AND
T
HROTTLING
C
OMMANDS
4-247
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.
Default Setting
64
Command Mode
Interface Configuration
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.” 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)#
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