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Catalyst 3560 Switch Command Reference
78-16405-05
Chapter 2 Catalyst 3560 Switch Cisco IOS Commands
ip igmp max-groups
ip igmp max-groups
Use the ip igmp max-groups interface configuration command to set the maximum number of Internet
Group Management Protocol (IGMP) groups that a Layer 2 interface can join or to configure the IGMP
throttling action when the maximum number of entries is in the forwarding table. Use the no form of this
command to set the maximum back to the default, which is to have no maximum limit, or to return to the
default throttling action, which is to drop the report.
ip igmp max-groups {number | action {deny | replace}}
no ip igmp max-groups {number | action}
Syntax Description
Defaults The default maximum number of groups is no limit.
After the switch learns the maximum number of IGMP group entries on an interface, the default
throttling action is to drop the next IGMP report that the interface receives and to not add an entry for
the IGMP group to the interface.
Command Modes Interface configuration
Command History
number The maximum number of IGMP groups that an interface can join. The range is 0 to
4294967294. The default is no limit.
action deny When the maximum number of entries is in the IGMP snooping forwarding table, drop
the next IGMP join report. This is the default action.
action
replace
When the maximum number of entries is in the IGMP snooping forwarding table,
replace the existing group with the new group for which the IGMP report was received.
Release Modification
12.1(19)EA1 This command was introduced.
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