3Com S7906E Configuration Manual page 1063

Configure the IP address and subnet mask for each interface as per
steps are omitted here.
Configure the OSPF protocol for interoperation among the switches in the PIM-DM domain. Ensure the
network-layer interoperation in the PIM-DM domain and enable dynamic update of routing information
among the switches through a unicast routing protocol. Detailed configuration steps are omitted here.
2) Enable IP multicast routing, and enable PIM-DM and IGMP
# Enable IP multicast routing on Switch A, enable PIM-DM on each interface, and enable IGMP on
VLAN-interface 100, which connects Switch A to the stub network.
<SwitchA> system-view
[SwitchA] multicast routing-enable
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] igmp enable
[SwitchA-Vlan-interface100] pim dm
[SwitchA-Vlan-interface100] quit
[SwitchA] interface vlan-interface 103
[SwitchA-Vlan-interface103] pim dm
[SwitchA-Vlan-interface103] quit
The configuration on Switch B and Switch C is similar to that on Switch A.
# Enable IP multicast routing on Switch D, and enable PIM-DM on each interface.
<SwitchD> system-view
[SwitchD] multicast routing-enable
[SwitchD] interface vlan-interface 300
[SwitchD-Vlan-interface300] pim dm
[SwitchD-Vlan-interface300] quit
[SwitchD] interface vlan-interface 103
[SwitchD-Vlan-interface103] pim dm
[SwitchD-Vlan-interface103] quit
[SwitchD] interface vlan-interface 101
[SwitchD-Vlan-interface101] pim dm
[SwitchD-Vlan-interface101] quit
[SwitchD] interface vlan-interface 102
[SwitchD-Vlan-interface102] pim dm
[SwitchD-Vlan-interface102] quit
3) Verify the configuration
Use the display pim interface command to view the PIM configuration and running status on each
interface. For example:
# View the PIM configuration information on Switch D.
[SwitchD] display pim interface
Interface
Vlan300
Vlan103
Vlan101
Vlan102
Carry out the display pim neighbor command to view the PIM neighboring relationships among the
switches. For example:
NbrCnt HelloInt DR-Pri
0 30 1
1 30 1
1 30 1
1 30 1
1-41
Figure 1-10. Detailed configuration
DR-Address
10.110.5.1 (local)
192.168.1.2 (local)
192.168.2.2 (local)
192.168.3.2 (local)