z

z

Before configuring related IGMP Snooping functions, you must enable IGMP Snooping in the specified VLAN.

Different multicast group addresses should be configured for different multicast sources because IGMPv3 Snooping cannot distinguish multicast data from different sources to the same multicast group.

Configuring Timers

This section describes how to configure the aging timer of the router port, the aging timer of the multicast member ports, and the query response timer.

Follow these steps to configure timers:

 

To do…

 

Use the command…

 

Remarks

 

Enter system view

 

system-view

 

 

 

 

 

 

 

 

Configure the aging timer of the

 

igmp-snooping

 

Optional

 

 

 

By default, the aging time of the

 

router port

 

router-aging-time seconds

 

 

 

 

router port is 105 seconds.

 

 

 

 

 

 

 

 

 

 

 

 

Configure the query response

 

igmp-snooping

 

Optional

 

 

 

By default, the query response

 

timer

 

max-response-time seconds

 

 

 

 

timeout time is 10 seconds.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Optional

 

Configure the aging timer of the

 

igmp-snooping

 

By default, the aging time of

 

multicast member port

 

host-aging-time seconds

 

multicast member ports is 260

 

 

 

 

 

seconds

 

 

 

 

 

 

Configuring Fast Leave Processing

With fast leave processing enabled, when the device receives an IGMP leave message on a port, the device directly removes that port from the forwarding table entry for the specific group. If only one host is attached to the port, enable fast leave processing to improve bandwidth management.

Enabling fast leave processing in system view

Follow these steps to enable fast leave processing in system view:

To do…

Use the command…

Remarks

Enter system view

system-view

 

 

 

 

igmp-snooping fast-leave

Required

Enable fast leave processing

By default, the fast leave

[ vlan vlan-list ]

 

processing feature is disabled.

 

 

 

 

 

2-6

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3Com WX3000 Configuring Timers, Configuring Fast Leave Processing, Enabling fast leave processing in system view