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With BGP peers configured on PE 4, the interfaces MTI 0 and MTI 1 will automatically obtain IP
addresses, which are the loopback interface addresses specified in the BGP peer configuration.
The PIM mode running on MTI 0 is the same as on the interfaces in VPN instance a, and the PIM
mode running on MTI 1 is the same as on the interfaces in VPN instance b.
# Configure OSPF.
[PE4] ospf 1
[PE4-ospf-1] area 0.0.0.0
[PE4-ospf-1-area-0.0.0.0] network 1.1.1.4 0.0.0.0
[PE4-ospf-1-area-0.0.0.0] network 10.10.0.0 0.0.255.255
[PE4-ospf-1-area-0.0.0.0] quit
[PE4-ospf-1] quit
[PE4] ospf 2 vpn-instance a
[PE4-ospf-2] import-route bgp
[PE4-ospf-2] area 0.0.0.0
[PE4-ospf-2-area-0.0.0.0] network 10.11.0.0 0.0.255.255
[PE4-ospf-2-area-0.0.0.0] quit
[PE4-ospf-2] quit
[PE4] ospf 3 vpn-instance b
[PE4-ospf-3] import-route bgp
[PE4-ospf-3] area 0.0.0.0
[PE4-ospf-3-area-0.0.0.0] network 10.11.0.0 0.0.255.255
[PE4-ospf-3-area-0.0.0.0] quit
[PE4-ospf-3] quit
5.
Configure CE a1:
# Enable IP multicast routing.
<CEa1> system-view
[CEa1] multicast routing-enable
# Assign an IP address and enable PIM-SM on GigabitEthernet 4/1/1.
[CEa1] interface GigabitEthernet 4/1/1
[CEa1-GigabitEthernet4/1/1] ip address 10.11.5.1 24
[CEa1-GigabitEthernet4/1/1] pim sm
[CEa1-GigabitEthernet4/1/1] quit
# Assign an IP address and enable PIM-SM on GigabitEthernet 4/1/2.
[CEa1] interface GigabitEthernet 4/1/2
[CEa1-GigabitEthernet4/1/2] ip address 10.11.1.2 24
[CEa1-GigabitEthernet4/1/2] pim sm
[CEa1-GigabitEthernet4/1/2] quit
# Assign an IP address to Loopback 1, and enable PIM-SM.
[CEa1] interface loopback 1
[CEa1-LoopBack1] ip address 2.2.2.2 32
[CEa1-LoopBack1] pim sm
[CEa1-LoopBack1] quit
# Configure Loopback 1 as a C-BSR and a C-RP for VPN a.
[CEa1] pim
[CEa1-pim] c-bsr loopback 1
[CEa1-pim] c-rp loopback 1
[CEa1-pim] quit