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Configuration procedure
1. Configure Switch A:
# Enable IGMP snooping globally.
<SwitchA> system-view
[SwitchA] igmp-snooping
[SwitchA-igmp-snooping] quit
# Create VLAN 100, and assign GigabitEthernet 1/0/1 through GigabitEthernet 1/0/3 to the
VLAN.
[SwitchA] vlan 100
[SwitchA-vlan100] port gigabitethernet 1/0/1 to gigabitethernet 1/0/3
# Enable IGMP snooping, and enable dropping unknown multicast data for VLAN 100.
[SwitchA-vlan100] igmp-snooping enable
[SwitchA-vlan100] igmp-snooping drop-unknown
# Configure Switch A as the IGMP snooping querier.
[SwitchA-vlan100] igmp-snooping querier
[SwitchA-vlan100] quit
# In VLAN 100, specify 192.168.1.1 as the source IP address of IGMP general queries.
[SwitchA-vlan100] igmp-snooping general-query source-ip 192.168.1.1
# In VLAN 100, specify 192.168.1.1 as the source IP address of IGMP group-specific queries.
[SwitchA-vlan100] igmp-snooping special-query source-ip 192.168.1.1
[SwitchA-vlan100] quit
2. Configure Switch B:
# Enable IGMP snooping globally.
<SwitchB> system-view
[SwitchB] igmp-snooping
[SwitchB-igmp-snooping] quit
# Create VLAN 100, and assign GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4 to the
VLAN.
[SwitchB] vlan 100
[SwitchB-vlan100] port gigabitethernet 1/0/1 to gigabitethernet 1/0/4
# Enable IGMP snooping, and enable dropping unknown multicast data for VLAN 100.
[SwitchB-vlan100] igmp-snooping enable
[SwitchB-vlan100] igmp-snooping drop-unknown
[SwitchB-vlan100] quit
3. Configure Switch C:
# Enable IGMP snooping globally.
<SwitchC> system-view
[SwitchC] igmp-snooping
[SwitchC-igmp-snooping] quit
# Create VLAN 100, and assign GigabitEthernet 1/0/1 through GigabitEthernet 1/0/3 to the
VLAN.
[SwitchC] vlan 100
[SwitchC-vlan100] port gigabitethernet 1/0/1 to gigabitethernet 1/0/3
# Enable IGMP snooping, and enable dropping unknown multicast data for VLAN 100.
[SwitchC-vlan100] igmp-snooping enable
[SwitchC-vlan100] igmp-snooping drop-unknown
[SwitchC-vlan100] quit
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