202 
# On Switch B, enable IP multicast routing, enable PIM-SM on each interface, enable IGMP in 
VLAN interface 200, and enable BIDIR-PIM. 
<SwitchB> system-view 
[SwitchB] multicast routing-enable 
[SwitchB] interface vlan-interface 200 
[SwitchB-Vlan-interface200] igmp enable 
[SwitchB-Vlan-interface200] pim sm 
[SwitchB-Vlan-interface200] quit 
[SwitchB] interface vlan-interface 101 
[SwitchB-Vlan-interface101] pim sm 
[SwitchB-Vlan-interface101] quit 
[SwitchB] interface vlan-interface 102 
[SwitchB-Vlan-interface102] pim sm 
[SwitchB-Vlan-interface102] quit 
[SwitchB] pim 
[SwitchB-pim] bidir-pim enable 
[SwitchB-pim] quit 
# On Switch C, enable IP multicast routing, enable PIM-SM on each interface, and enable 
BIDIR-PIM.  
<SwitchC> system-view 
[SwitchC] multicast routing-enable 
[SwitchC] interface vlan-interface 102 
[SwitchC-Vlan-interface102] pim sm 
[SwitchC-Vlan-interface102] quit 
[SwitchC] interface vlan-interface 103 
[SwitchC-Vlan-interface103] pim sm 
[SwitchC-Vlan-interface103] quit 
[SwitchC] interface loopback 0 
[SwitchC-LoopBack0] pim sm 
[SwitchC-LoopBack0] quit 
[SwitchC] pim 
[SwitchC-pim] bidir-pim enable 
# On Switch D, enable IP multicast routing, enable PIM-SM on each interface, enable IGMP in 
VLAN interface 300, and enable BIDIR-PIM. 
<SwitchD> system-view 
[SwitchD] multicast routing-enable 
[SwitchD] interface vlan-interface 300 
[SwitchD-Vlan-interface300] igmp enable 
[SwitchD-Vlan-interface300] pim sm 
[SwitchD-Vlan-interface300] quit 
[SwitchD] interface vlan-interface 400 
[SwitchD-Vlan-interface400] pim sm 
[SwitchD-Vlan-interface400] quit 
[SwitchD] interface vlan-interface 103 
[SwitchD-Vlan-interface103] pim sm 
[SwitchD-Vlan-interface103] quit 
[SwitchD] pim