3Com 10014298 manual Enabling/Disabling Igmp Snooping, Configure Router Port Aging Time

IGMP Snooping 127

Configuring IGMP Snooping

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:

■Configuring IGMP Snooping

■Example: IGMP Snooping Configuration

■Troubleshooting IGMP Snooping

The main IGMP Snooping configuration includes:

■Enabling/Disabling IGMP Snooping

■Configure Router Port Aging Time

■Configuring Maximum Response Time

■Configure Aging Time of Multicast Group Member

■Displaying and Debugging IGMP Snooping

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

Enabling/Disabling IGMP Snooping

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.

Table 133 Enable/Disable IGMP Snooping

Operation	Command
Enable/disable IGMP Snooping	igmp-snooping { enable disable }
Restore the default setting	undo igmp-snooping

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

By default, IGMP Snooping is disabled.

Configure Router Port Aging Time

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 134 Configure Router Port Aging Time

Operation	Command
Configure router port aging time	igmp-snooping router-aging-time
	seconds