SMC Networks SMC8150L2 manual Enabling Igmp Immediate Leave, Igmp Configuration

3 Configuring the Switch

Web – Click IGMP Snooping, IGMP Configuration. Adjust the IGMP settings as required, and then click Apply. (The default settings are shown below.)

Figure 3-97 IGMP Configuration

CLI – This example modifies the settings for multicast filtering, and then displays the current status.

Console(config)#ip igmp	snooping	4-202
Console(config)#ip igmp	snooping querier	4-206
Console(config)#ip igmp	snooping query-count 10	4-206
Console(config)#ip igmp	snooping query-interval 100	4-207
Console(config)#ip igmp	snooping query-max-response-time 20	4-208
Console(config)#ip igmp	snooping router-port-expire-time 300	4-208
Console(config)#ip igmp snooping version 2		4-203
Console(config)#exit
Console#show ip igmp snooping		4-203
Service status:	Enabled
Querier status:	Enabled
Leave proxy status:	Disabled
Query count:	10
Query interval:	100 sec
Query max response time: 20 sec
Router port expire time: 300 sec
Immediate Leave Processing: Disabled on all VLAN
IGMP snooping version:	Version 2
Console#

Enabling IGMP Immediate Leave

The IGMP snooping immediate-leave feature enables a Layer 2 LAN interface to be removed from the multicast forwarding table without first sending an IGMP group-specific query to the interface. Upon receiving a group-specific IGMPv2 leave message, the switch immediately removes the interface from the Layer 2 forwarding table entry for that multicast group, unless a multicast router was learned on the port.

IGMP immediate leave improves bandwidth management for all hosts in a switched network.

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