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2. Configure OSPF on the routers. (Details not shown.)
3. Enable IP multicast routing, enable PIM-SM and IGMP, and configure a PIM-SM domain border:
# On Router A, enable IP multicast routing.
<RouterA> system-view
[RouterA] multicast routing
[RouterA-mrib] quit
# Enable PIM-SM on GigabitEthernet 2/1/1 and GigabitEthernet 2/1/2.
[RouterA] interface gigabitethernet 2/1/1
[RouterA-GigabitEthernet2/1/1] pim sm
[RouterA-GigabitEthernet2/1/1] quit
[RouterA] interface gigabitethernet 2/1/2
[RouterA-GigabitEthernet2/1/2] pim sm
[RouterA-GigabitEthernet2/1/2] quit
# Enable IGMP on GigabitEthernet 2/1/3 (the interface that connects to the receiver host).
[RouterA] interface gigabitethernet 2/1/3
[RouterA-GigabitEthernet2/1/3] igmp enable
[RouterA-GigabitEthernet2/1/3] quit
# Enable IP multicast routing, PIM-SM, and IGMP on Router B, Router C, Router D, Router E, and
Router F in the same way Router A is configured. (Details not shown.)
# Configure a PIM domain border on Router B.
[RouterB] interface gigabitethernet 2/1/2
[RouterB-GigabitEthernet2/1/2] pim bsr-boundary
[RouterB-GigabitEthernet2/1/2] quit
# Configure a PIM domain border separately on Router C and Router E in the same way Router B
is configured. (Details not shown.)
4. Configure C-BSRs and C-RPs:
# Configure Loopback 0 on Router B as a C-BSR and a C-RP.
[RouterB] pim
[RouterB-pim] c-bsr 1.1.1.1
[RouterB-pim] c-rp 1.1.1.1
[RouterB-pim] quit
# Configure C-BSRs and C-RPs on Router C and Router E in the same way Router B is configured.
(Details not shown.)
5. Configure BGP for mutual route redistribution between BGP and OSPF:
# On Router B, configure an eBGP peer and redistribute OSPF routes.
[RouterB] bgp 100
[RouterB-bgp] router-id 1.1.1.1
[RouterB-bgp] peer 192.168.1.2 as-number 200
[RouterB-bgp] address-family ipv4
[RouterB-bgp-ipv4] import-route ospf 1
[RouterB-bgp-ipv4] peer 192.168.1.2 enable
[RouterB-bgp-ipv4] quit
[RouterB-bgp] quit
# On Router C, configure an eBGP peer and redistribute OSPF routes.
[RouterC] bgp 200
[RouterC-bgp] router-id 2.2.2.2
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