Cisco Catalyst 2960 Series

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PurposeCommand or Action

Example:

Switch(config-if)# ip igmp

• deny—Drops the report. If you configure this throttling action, the

entries that were previously in the forwarding table are not removed

but are aged out. After these entries are aged out and the maximum

number of entries is in the forwarding table, the switch drops the next

IGMP report received on the interface.

max-groups action replace

• replace—Replaces the existing group with the new group for which

the IGMP report was received. If you configure this throttling action,

the entries that were previously in the forwarding table are removed.

When the maximum number of entries is in the forwarding table, the

switch replaces a randomly selected entry with the received IGMP

report.

To prevent the switch from removing the forwarding-table entries, you can

configure the IGMP throttling action before an interface adds entries to the

forwarding table.

To return to the default action of dropping the report, use the no ip

igmp max-groups action interface configuration command.

Note

Returns to privileged EXEC mode.end

Example:

Switch(config)# end

Step 5

Verifies your entries.show running-config interface

interface-id

Step 6

Example:

Switch# show running-config

interface gigabitethernet1/0/1

(Optional) Saves your entries in the configuration file.copy running-config startup-config

Example:

Switch# copy running-config

Step 7

startup-config

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