Example for Configuring Inter-AS Multicast Using Static RPF Peers

Procedure

1. Configure IP addresses for interfaces and configure a unicast routing protocol on each router.

   # According to Figure 6-11, configure IP addresses and masks for the interfaces on each router. Configure OSPF in the ASs. Configure EBGP between routerA and routerF, and between routerB and routerE. Import BGP and OSPF routes into each other's routing table. Ensure network connectivity between routers and enable routers to update routes using the unicast routing protocol. The configuration details are not mentioned here.

2. # Enable multicast on routers and enable PIM-SM on each interface, and enable IGMP on interfaces connected to network segments of receiver hosts. In addition, configure the BSR boundary on the interfaces of routers on the AS boundary.

   # Enable multicast all routers and enable PIM-SM on each interface. The configurations on other routers are similar to the configuration on RouterC, and are not mentioned here.

   [RouterC] multicast routing-enable
   [RouterC] interface gigabitethernet 1/0/0
   [RouterC-Gigabitethernet1/0/0] pim sm
   [RouterC-Gigabitethernet1/0/0] quit
   [RouterC] interface gigabitethernet 2/0/0
   [RouterC-Gigabitethernet2/0/0] pim sm
   [RouterC-Gigabitethernet2/0/0] quit

   # Enable IGMP on GE3/0/0 of RouterE. The configuration on RouterG is similar to the configuration on RouterE, and is not mentioned here.

   [RouterE] interface gigabitethernet 3/0/0
   [RouterE-GigabitEthernet3/0/0] igmp enable
   [RouterE-GigabitEthernet3/0/0] quit

   # Configure a BSR boundary on GE1/0/0 of RouterA, GE2/0/0 of RouterB, GE2/0/0 of RouterE, and GE1/0/0 of RouterF. The configurations on RouterB, RouterE, and RouterF are similar to the configuration on RouterA, and are not mentioned here.

   [RouterA] interface gigabitethernet 1/0/0
   [RouterA-GigabitEthernet1/0/0] pim bsr-boundary
   [RouterA-GigabitEthernet1/0/0] quit

3. Configure Loopback0 interfaces, C-BSRs, and C-RPs on routeres.

   # Configure Loopback0 interfaces on RouterC, RouterD, and RouterF. Configure Loopback0 interfaces as C-BSRs and C-RPs. The configurations on RouterD and RouterF are similar to the configuration on RouterC, and are not mentioned here.

   [RouterC] interface loopback 0
   [RouterC-LoopBack0] ip address 10.10.1.1 255.255.255.255
   [RouterC-LoopBack0] pim sm
   [RouterC-LoopBack0] quit
   [RouterC] pim
   [RouterC-pim] c-bsr loopback 0
   [RouterC-pim] c-rp loopback 0
   [RouterC-pim] quit

4. Configure static RPF peers.

   # Configure RouterD and RouterF as the static RPF peers of RouterC.

   [RouterC] ip ip-prefix list-df permit 192.168.0.0 16 greater-equal 16 less-equal 32
   [RouterC] msdp
   [RouterC-msdp] peer 192.168.3.2 connect-interface gigabitethernet 1/0/0
   [RouterC-msdp] peer 192.168.5.1 connect-interface gigabitethernet 2/0/0
   [RouterC-msdp] static-rpf-peer 192.168.3.2 rp-policy list-df
   [RouterC-msdp] static-rpf-peer 192.168.5.1 rp-policy list-df 
   [RouterC-msdp] quit

   # Configure RouterC as the only static RPF peer of RouterD and RouterF. The configuration on RouterF is similar to the configuration on RouterD, and is not mentioned here.

   [RouterD] ip ip-prefix list-c permit 192.168.0.0 16 greater-equal 16 less-equal 32
   [RouterD] msdp
   [RouterD-msdp] peer 192.168.1.1 connect-interface gigabitethernet 1/0/0
   [RouterD-msdp] static-rpf-peer 192.168.1.1 rp-policy list-c 

5. Verify the configuration.

   # Run the display bgp peer command to view the BGP peer relationships among routeres. No command output is displayed on RouterC, which indicates that no BGP peer relationship is set up between RouterC and RouterD, or between RouterC and RouterF.

   # Run the display msdp brief command to view the status of the MSDP peers on routeres. When S1 in the PIM-SM1 domain sends multicast data, the receivers in PIM-SM2 and PIM-SM3 domains can receive the data. The following output shows summary information about MSDP peers on RouterC, RouterD and RouterF:

   <RouterC> display msdp brief
   MSDP Peer Brief Information of VPN-Instance: public net
     Configured   Up           Listen       Connect      Shutdown     Down
     2            2            0            0            0            0
    
     Peer's Address     State     Up/Down time    AS     SA Count   Reset Count
     192.168.3.2        Up        01:07:08        ?      8          0
     192.168.5.1        Up        00:16:39        ?      13         0
   

   <RouterD> display msdp brief
   MSDP Peer Brief Information of VPN-Instance: public net
     Configured   Up           Listen       Connect      Shutdown     Down
     1            1            0            0            0            0
    
     Peer's Address     State     Up/Down time    AS     SA Count   Reset Count
     192.168.1.1        Up        01:07:09        ?      8          0
   

   <RouterF> display msdp brief
   MSDP Peer Brief Information of VPN-Instance: public net
     Configured   Up           Listen       Connect      Shutdown     Down
     1            1            0            0            0            0
    
     Peer's Address     State     Up/Down time    AS     SA Count   Reset Count
     192.168.4.1        Up        00:16:40        ?      13         0