3Com 5500G Configuration on Switch a, System view otherwise the configuration will not succeed

	Configuring IGMP Snooping 137
MAC group address: 0100-5e01-0101
Host port(s): Ethernet1/0/3	Ethernet1/0/4

As shown above, a multicast group entry for 224.1.1.1 has been created on Switch A, with Ethernet 1/0/1 as the router port and Ethernet 1/0/3 and Ethernet 1/0/4 as dynamic member ports. This means that Host A and Host B have joined the multicast group 224.1.1.1.

Complete Configuration	Configuration on Switch A
	#
	igmp-snooping enable
	#
	vlan 100
	igmp-snooping enable
	#
	interface Ethernet1/0/1
	port access vlan 100
	#
	interface Ethernet1/0/2
	port access vlan 100
	#
	interface Ethernet1/0/3
	port access vlan 100
	#
	interface Ethernet1/0/4
	port access vlan 100
	#
Precautions	■ Layer 2 and Layer 3 multicast protocols can run on the same switch. However, a
	Layer 2 multicast protocol cannot run in a VLAN while a Layer 3 multicast
	protocol is running on the corresponding VLAN interface, and vice versa.
	■ Before enabling IGMP Snooping in a VLAN, be sure to enable IGMP Snooping
	in system view; otherwise the configuration will not succeed.