•
If you configure the throttling action as replace and set the maximum group limitation, the entries that
were previously in the forwarding table are removed. When the maximum number of entries is in the
forwarding table, the device replaces a randomly selected multicast entry with the received IGMP report.
•
When the maximum group limitation is set to the default (no maximum), entering the ip igmp max-groups
{deny | replace} command has no effect.
Examples
This example shows how to limit to 25 the number of IGMP groups that a port can join:
Device(config)# interface gigabitethernet1/0/2
Device(config-if)# ip igmp max-groups 25
This example shows how to configure the device to replace the existing group with the new group for which
the IGMP report was received when the maximum number of entries is in the forwarding table:
Device(config)# interface gigabitethernet2/0/1
Device(config-if)# ip igmp max-groups action replace
You can verify your setting by using the show running-config privileged EXEC command and by specifying
an interface.
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
219
ip igmp max-groups
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