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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.