3Com Switch 4800G 24-Port Configuration Manual page 687

<SwitchA> system-view
[SwitchA] multicast routing-enable
[SwitchA] interface vlan-interface 103
[SwitchA-Vlan-interface103] pim sm
[SwitchA-Vlan-interface103] quit
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] pim sm
[SwitchA-Vlan-interface100] quit
[SwitchA] interface vlan-interface 200
[SwitchA-Vlan-interface200] igmp enable
[SwitchA-Vlan-interface200] pim sm
[SwitchA-Vlan-interface200] quit
The configuration on Switch B, Switch C, Switch D, Switch E, and Switch F is
similar to the configuration on Switch A.
# Configure a PIM domain border on Switch B.
[SwitchB] interface vlan-interface 101
[SwitchB-Vlan-interface101] pim bsr-boundary
[SwitchB-Vlan-interface101] quit
The configuration on Switch C and Switch E is similar to the configuration on
Switch B.
3 Configure C-BSRs and C-RPs
# Configure Loopback 0 as a C-BSR and a C-RP on Switch B.
[SwitchB] pim
[SwitchB-pim] c-bsr loopback 0
[SwitchB-pim] c-rp loopback 0
[SwitchB-pim] quit
The configuration on Switch C and Switch E is similar to the configuration on
Switch B.
4 Configure BGP for mutual route redistribution between BGP and OSPF
# Configure EBGP on Switch B, and redistribute OSPF routes.
[SwitchB] bgp 100
[SwitchB-bgp] router-id 1.1.1.1
[SwitchB-bgp] peer 192.168.1.2 as-number 200
[SwitchB-bgp] import-route ospf 1
[SwitchB-bgp] quit
# Configure IBGP and EBGP on Switch C, and redistribute OSPF routes.
[SwitchC] bgp 200
[SwitchC-bgp] router-id 2.2.2.2
[SwitchC-bgp] peer 192.168.1.1 as-number 100
[SwitchC-bgp] peer 192.168.3.2 as-number 200
[SwitchC-bgp] import-route ospf 1
[SwitchC-bgp] quit
# Configure IBGP on Switch E, and redistribute OSPF routes.
[SwitchE] bgp 200
[SwitchE-bgp] router-id 3.3.3.3
[SwitchE-bgp] peer 192.168.3.1 as-number 200
[SwitchE-bgp] import-route ospf 1
[SwitchE-bgp] quit
# Redistribute BGP routes into OSPF on Switch B.
MSDP Configuration Examples 687