3com 3.01.01 Benutzerhandbuch

C

HAPTER

 6: M

ULTICAST

 P

ROTOCOL

not have any member, the switch will notify the multicast router to remove it from 
the multicast tree. 

Configuring IGMP Snooping is described in the following sections:

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The main IGMP Snooping configuration includes: 

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Of the above configuration tasks, enabling IGMP Snooping is required, while 
others are optional. 

You can use the following commands to enable/disable IGMP Snooping on Layer 
2.

Perform the following configuration in system view. To enable IGMP snooping, 
you must also issue the igmp-snooping enable command in VLAN view.

IGMP Snooping and GMRP cannot run at the same time. You can check if GMRP is 
running by using the display gmrp status command, in all views, before 
enabling IGMP Snooping. 

By default, IGMP Snooping is disabled. 

Use this to manually configure the router port aging time. If the switch has not 
received a general query message from the router prior to it aging, it will remove 
the port from all the MAC multicast groups. 

Perform the following configuration in system view.

Table 20   Enable/Disable IGMP Snooping

Enable/disable IGMP Snooping

igmp-snooping { enable | disable }

Restore the default setting

Table 21   Configure Router Port Aging Time

Configure router port aging time

igmp-snooping router-aging-time seconds

Restore the default aging time