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[SwitchA] vlan 2 to 5
# Configure GigabitEthernet 1/0/2 as a trunk port, and assign it to VLAN 2 and VLAN 3.
[SwitchA] interface gigabitethernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] port link-type trunk
[SwitchA-GigabitEthernet1/0/2] port trunk permit vlan 2 3
[SwitchA-GigabitEthernet1/0/2] quit
# Configure GigabitEthernet 1/0/3 as a trunk port, and assign it to VLAN 4 and VLAN 5.
[SwitchA] interface gigabitethernet 1/0/3
[SwitchA-GigabitEthernet1/0/3] port link-type trunk
[SwitchA-GigabitEthernet1/0/3] port trunk permit vlan 4 5
[SwitchA-GigabitEthernet1/0/3] quit
# Create VLAN 10, assign GigabitEthernet 1/0/1 to this VLAN, and enable IGMP snooping in
the VLAN.
[SwitchA] vlan 10
[SwitchA-vlan10] port gigabitethernet 1/0/1
[SwitchA-vlan10] igmp-snooping enable
[SwitchA-vlan10] quit
# Configure VLAN 10 as a multicast VLAN, and configure VLAN 2 through VLAN 5 as its
sub-VLANs.
[SwitchA] multicast-vlan 10
[SwitchA-mvlan-10] subvlan 2 to 5
[SwitchA-mvlan-10] quit
4.
Configure Switch B:
# Enable IGMP snooping globally.
<SwitchB> system-view
[SwitchB] igmp-snooping
[SwitchB-igmp-snooping] quit
# Create VLAN 2, assign GigabitEthernet 1/0/2 to VLAN 2, and enable IGMP snooping in the
VLAN.
[SwitchB] vlan 2
[SwitchB-vlan2] port gigabitethernet 1/0/2
[SwitchB-vlan2] igmp-snooping enable
[SwitchB-vlan2] quit
# Create VLAN 3, assign GigabitEthernet 1/0/3 to VLAN 3, and enable IGMP snooping in the
VLAN.
[SwitchB] vlan 3
[SwitchB-vlan3] port gigabitethernet 1/0/3
[SwitchB-vlan3] igmp-snooping enable
[SwitchB-vlan3] quit
# Configure GigabitEthernet 1/0/1 as a trunk port, and assign it to VLAN 2 and VLAN 3.
[SwitchB] interface gigabitethernet 1/0/1
[SwitchB-GigabitEthernet1/0/1] port link-type trunk
[SwitchB-GigabitEthernet1/0/1] port trunk permit vlan 2 3
5.
Configure Switch C in the same way as you configure Switch B. (Details not shown.)
Verifying the configuration
# Display information about the multicast VLAN.
[SwitchA] display multicast-vlan
Total 1 multicast-vlan(s)