3Com WX3000 Enabling Igmp Snooping, Configuring the Version of Igmp Snooping, Version-number

Operation

Configuring a VLAN Tag for Query Messages

Configuring Multicast VLAN

Remarks

Optional

Optional

Enabling IGMP Snooping

Follow these steps to enable IGMP Snooping:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enable IGMP Snooping		Required
	igmp-snooping enable	By default, IGMP Snooping is
globally
		disabled globally.
Enter VLAN view	vlan vlan-id	—
Enable IGMP Snooping on the		Required
	igmp-snooping enable	By default, IGMP Snooping is
VLAN
		disabled on all the VLANs.

z

z

Before enabling IGMP Snooping in a VLAN, be sure to enable IGMP Snooping globally in system view; otherwise the IGMP Snooping settings will not take effect.

If IGMP Snooping and VLAN VPN are enabled on a VLAN at the same time, IGMP queries are likely to fail to pass the VLAN. You can solve this problem by configuring VLAN tags for queries. For details, see Configuring a VLAN Tag for Query Messages.

Configuring the Version of IGMP Snooping

With the development of multicast technologies, IGMPv3 has found increasingly wide application. In IGMPv3, a host can not only join a specific multicast group but also explicitly specify to receive or reject the information from a specific multicast source. Working with PIM-SSM, IGMPv3 enables hosts to join specific multicast sources and groups directly, greatly simplifying multicast routing protocols and optimizing the network topology.

Follow these steps to configure the version of IGMP Snooping:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Enter VLAN view	vlan vlan-id	—
Configure the version of IGMP	igmp-snooping version	Optional
		The default IGMP Snooping
Snooping	version-number
		version is version 2.

2-5