Alcatel-Lucent 6850-48 网络指南

Configuring IP Multicast Switching

Modifying IPMS Parameters

OmniSwitch AOS Release 6 Network Configuration Guide

page 42-21

By default there is no limit on the number of IGMP groups that can be learned on a port/vlan instance. A 
maximum group limit can be set on a port, VLAN or on a global level to limit the number of IGMP groups 
that can be learned. Once the configured limit is reached, a configurable action will decide whether the 
new IGMP report will be dropped or will replace an existing IGMP membership.

The maximum group limit can be applied globally, per VLAN, or per port. Port settings override VLAN 
settings, which override global settings.

If the maximum number of groups is reached an action can be configured to either drop the new member-
ship request or replace an existing group membership as show below.

To set the IGMP global group limit and drop any requests above the limit, use the 

 command as shown below:

-> ip multicast max-group 25 action drop

To set the IGMP group limit for a VLAN and replace an existing session use the 

 command as shown below:

-> ip multicast vlan 10 max-group 25 action replace

To set the IGMP group limit for a port and drop any requests above the limit, use the 

 command as shown below:

-> ip multicast port 1/1 max-group 25 action drop