Cisco Catalyst 3560-X Command Reference Manual page 290

Hide thumbs Also See for Catalyst 3560-X:

Table of Contents

ip igmp max-groups

Related Commands

Catalyst 3750-X and 3560-X Switch Command Reference

Downloaded from

www.Manualslib.com

Follow these guidelines when configuring the IGMP throttling action:

If you configure the throttling action as deny and set the maximum group limitation, the entries that

were previously in the forwarding table are not removed but are aged out. After these entries are

aged out, when the maximum number of entries is in the forwarding table, the switch drops the next

IGMP report received on the interface.

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 switch 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.

This example shows how to limit to 25 the number of IGMP groups that a port can join:

Switch(config)# interface gigabitethernet1/0/2

Switch(config-if)# ip igmp max-groups 25

This example shows how to configure the switch 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:

Switch(config)# interface gigabitethernet2/0/1

Switch(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.

show running-config interface

interface-id

manuals search engine

Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

Displays the running configuration on the switch interface, including

the maximum number of IGMP groups that an interface can join and

the throttling action. For syntax information, select Cisco IOS

Configuration Fundamentals Command Reference, Release 12.2 >

File Management Commands > Configuration File Management

Catalyst 3750-x