126 
[SwitchD-Vlan-interface104] pim sm 
[SwitchD-Vlan-interface104] quit 
# Enable IP multicast routing on Switch A, and enable PIM-SM on each interface. 
<SwitchA> system-view 
[SwitchA] multicast routing-enable 
[SwitchA] interface vlan-interface 100 
[SwitchA-Vlan-interface100] pim sm 
[SwitchA-Vlan-interface100] quit 
[SwitchA] interface vlan-interface 101 
[SwitchA-Vlan-interface101] pim sm 
[SwitchA-Vlan-interface101] quit 
[SwitchA] interface vlan-interface 104 
[SwitchA-Vlan-interface104] pim sm 
[SwitchA-Vlan-interface104] quit 
# Enable IP multicast routing and PIM-SM on Switch B and Switch C in the same way. (Details not 
shown.) 
4.  Configure C-BSR and C-RP interfaces on Switch D. 
[SwitchD] pim 
[SwitchD-pim] c-bsr vlan-interface 104 
[SwitchD-pim] c-rp vlan-interface 104 
[SwitchD-pim] quit 
5.  Configure the SSM group range: 
# Configure the SSM group range 232.1.1.0/24 on Switch D. 
[SwitchD] acl number 2000 
[SwitchD-acl-basic-2000] rule permit source 232.1.1.0 0.0.0.255 
[SwitchD-acl-basic-2000] quit 
[SwitchD] pim 
[SwitchD-pim] ssm-policy 2000 
[SwitchD-pim] quit 
# Configure the SSM group range 232.1.1.0/24 on Switch A, Switch B and Switch C in the same 
way. (Details not shown.) 
6.  Configure IGMP SSM mappings on Switch D. 
[SwitchD] igmp 
[SwitchD-igmp] ssm-mapping 232.1.1.0 24 133.133.1.1 
[SwitchD-igmp] ssm-mapping 232.1.1.0 24 133.133.3.1 
[SwitchD-igmp] quit 
Verifying the configuration 
# Display the IGMP SSM mapping information for multicast group 232.1.1.1 on Switch D. 
[SwitchD] display igmp ssm-mapping 232.1.1.1 
Vpn-Instance: public net 
Group: 232.1.1.1 
Source list:  
             133.133.1.1 
             133.133.3.1