3Com 10014298 manual Example Igmp Snooping Configuration, Display the status of Gmrp

	IGMP Snooping 129
Table 137 Display and Debug IGMP Snooping
Operation	Command
Enable/disable IGMP Snooping debugging	debug igmp-snooping { all
(abnormal, group, packet, timer).	abnormal group packet
	timers }
Disable IGMP Snooping debugging (abnormal,	undo debug igmp-snooping { all
group, packet, timer).	abnormal group packet
	timers }

Example: IGMP Snooping Configuration

To implement IGMP Snooping on the switch, first enable it. The switch is connected with the router through the router port, and with user PC through the non-router ports.

Figure 31 IGMP Snooping Configuration Network

Internet

A router running

IGMP

IGMP packets

An Ethernet switch running IGMP snooping

IGMP packets

1Display the status of GMRP.

<SW7750>display gmrp status

2Display the current status of IGMP Snooping when GMRP is disabled.

<SW7750>display igmp-snooping configuration

3Enable IGMP Snooping if it is disabled.

[SW7750]igmp-snooping enable

Troubleshooting IGMP If the multicast function cannot be implemented on the switch, check for the Snooping following conditions and use the accompanying troubleshooting procedure:

1IGMP Snooping is disabled.

■Input the display current-configurationcommand to display the status of IGMP Snooping.

■If the switch disabled IGMP Snooping, you can input igmp-snooping enable in the system view to enable IGMP Snooping.

2Multicast forwarding table set up by IGMP Snooping is wrong.