3Com MSR 50 Series Configuration Manual page 1147

<RouterC> system-view
[RouterC] multicast routing-enable
[RouterC] interface ethernet 1/0
[RouterC-Ethernet1/0] pim sm
[RouterC-Ethernet1/0] quit
[RouterC] interface ethernet 1/1
[RouterC-Ethernet1/1] pim sm
[RouterC-Ethernet1/1] quit
[RouterC] interface pos 5/0
[RouterC-Pos5/0] pim sm
The configuration on Router A, Router B, Router D, Router E, Router F and Router
G is similar to the configuration on Router C.
# Configure a BSR admin-scope region boundary on Router C.
[RouterC-Pos5/0] pim bsr-boundary
[RouterC-Pos5/0] quit
The configuration on Router D and Router F is similar to the configuration on
Router C.
3 Configure Loopback0 and the position of C-BSR, and C-RP
# Configure the position of Loopback0, C-BSR, and C-RP on Router C.
[RouterC] interface loopback 0
[RouterC-LoopBack0] ip address 1.1.1.1 255.255.255.255
[RouterC-LoopBack0] pim sm
[RouterC-LoopBack0] quit
[RouterC] pim
[RouterC-pim] c-bsr loopback 0
[RouterC-pim] c-rp loopback 0
[RouterC-pim] quit
The configuration on Router D and Router F is similar to the configuration on
Router C.
4 Configure inter-AS BGP and configure mutual route redistribution between BGP
and OSPF
# Configure EBGP on Router C, and redistribute OSPF routes.
[RouterC] bgp 100
[RouterC-bgp] router-id 1.1.1.1
[RouterC-bgp] peer 192.168.1.2 as-number 200
[RouterC-bgp] import-route ospf 1
[RouterC-bgp] quit
# Configure IBGP and EBGP on Router D, and redistribute OSPF routes.
[RouterD] bgp 200
[RouterD-bgp] router-id 2.2.2.2
[RouterD-bgp] peer 192.168.1.1 as-number 100
[RouterD-bgp] peer 192.168.3.2 as-number 200
[RouterD-bgp] import-route ospf 1
[RouterD-bgp] quit
MSDP Configuration Examples 1147