Example for Configuring PIM-SM Inter-domain Multicast Using MSDP

Procedure

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

   # According to Figure 6-10, configure IP addresses and masks for the interfaces on each router. Configure OSPF between routers. Ensure network connectivity in each AS and enable each router to update routes using the unicast routing protocol. The configuration details are not mentioned here.

2. Configure EBGP peers between ASs and import routes of BGP and OSPF into each other's routing table.

   # Configure EBGP on RouterB and import OSPF routes to BGP.

   [RouterB] bgp 100
   [RouterB-bgp] router-id 10.10.1.1
   [RouterB-bgp] peer 192.168.2.2 as-number 200
   [RouterB-bgp] ipv4-family multicast
   [RouterB-bgp-af-multicast] peer 192.168.2.2 enable
   [RouterB-bgp-af-multicast] quit
   [RouterB-bgp] import-route ospf 1
   [RouterB-bgp] quit

   # Configure EBGP on RouterC and import OSPF routes to BGP.

   [RouterC] bgp 200
   [RouterC-bgp] router-id 10.10.1.2
   [RouterC-bgp] peer 192.168.2.1 as-number 100
   [RouterC-bgp] ipv4-family multicast
   [RouterC-bgp-af-multicast] peer 192.168.2.1 enable
   [RouterC-bgp-af-multicast] quit
   [RouterC-bgp] import-route ospf 1
   [RouterC-bgp] quit

   # Import BGP routes to OSPF on RouterB. The configuration on RouterC is similar to the configuration on RouterB, and is not mentioned here.

   [RouterB] ospf 1
   [RouterB-ospf-1] import-route bgp 
   [RouterB-ospf-1] quit

3. Enable multicast and PIM-SM on each interface. Configure a BSR boundary to divide the PIM-SM domain and enable IGMP on interfaces connected to network segments of receiver hosts.

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

   [RouterB] multicast routing-enable
   [RouterB] interface gigabitethernet 2/0/0
   [RouterB-GigabitEthernet2/0/0] pim sm
   [RouterB-GigabitEthernet2/0/0] quit
   [RouterB] interface gigabitethernet 1/0/0
   [RouterB-GigabitEthernet1/0/0] pim sm

   # Configure a BSR boundary on GE1/0/0 of RouterB.

   [RouterB-GigabitEthernet1/0/0] pim bsr-boundary
   [RouterB-GigabitEthernet1/0/0] quit

   # Configure BSR boundaries on GE1/0/0 and GE3/0/0 of RouterC. Configure a BSR boundary on GE3/0/0 of RouterE. The configurations on RouterC and RouterE are similar to the configuration on RouterB, and are not mentioned here.

   # Enable IGMP on the interface connecting to RouterD to the user network segment.

   [RouterD] interface gigabitethernet 1/0/0
   [RouterD-GigabitEthernet1/0/0] igmp enable

4. Configure C-BSRs and C-RPs.

   # Create a Loopback0 interface, and then configure the C-BSR and C-RP on Loopback0 of RouterB. The configurations on RouterC and RouterE are similar to the configuration on RouterB, and are not mentioned here.

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

5. Configuring MSDP peers.

   # Configure an MSDP peer on RouterB.

   [RouterB] msdp
   [RouterB-msdp] peer 192.168.2.2 connect-interface gigabitethernet 1/0/0
   [RouterB-msdp] quit

   # Configure MSDP peers on RouterC.

   [RouterC] msdp
   [RouterC-msdp] peer 192.168.2.1 connect-interface gigabitethernet 1/0/0
   [RouterC-msdp] peer 192.168.4.2 connect-interface gigabitethernet 3/0/0
   [RouterC-msdp] quit

   # Configure an MSDP peer on RouterE.

   [RouterE] msdp
   [RouterE-msdp] peer 192.168.4.1 connect-interface gigabitethernet 3/0/0
   [RouterE-msdp] quit

6. Verify the configuration.

   # Run the display bgp peer command to view the BGP peer relationships among routers. The following output shows the BGP peers of RouterB and RouterC:

   <RouterB> display bgp peer
   
    BGP local router ID : 10.10.1.1
    Local AS number : 100
    Total number of peers : 1                     Peers in established state : 1
   
     Peer          V   AS   MsgRcvd    MsgSent    OutQ    Up/Down    State          PrefRcv
   
     192.168.2.2   4   200   24         21          0      00:13:09   Established   6
   
   

   <RouterC> display bgp peer
   
   BGP local router ID : 10.10.1.2
    Local AS number : 200
    Total number of peers : 1                     Peers in established state : 1  
   
     Peer          V   AS    MsgRcvd    MsgSent     OutQ   Up/Down    State          PrefRcv
   
     192.168.2.1   4   100   18         16          0      00:12:04   Established   1
   

   # Run the display bgp routing-table command to view the BGP routing table on a router. The following output shows the BGP routing table on RouterC:

   [RouterC] display bgp routing-table
   
    BGP Local router ID is 10.10.1.2 
    Status codes: * - valid, > - best, d - damped,
                  h - history,  i - internal, s - suppressed, S - Stale
                  Origin : i - IGP, e - EGP, ? - incomplete
   
   
    Total Number of Routes: 22
         Network            NextHop        MED        LocPrf    PrefVal Path/Ogn
   
    *>   10.10.1.1/32       0.0.0.0         1                     0      ?
    *                       192.168.2.1     0                     0      100?
    *>   10.10.1.2/32       0.0.0.0         0                     0      ?
    *                       192.168.2.1     1                     0      100?
    *>   10.10.1.3/32       0.0.0.0         1                     0      ?
    *                       192.168.2.1     2                     0      100?
    *>   10.110.1.0/24      0.0.0.0         3                     0      ?
    *                       192.168.2.1     2                     0      100?
    *>   10.110.2.0/24      0.0.0.0         2                     0      ?
    *                       192.168.2.1     3                     0      100?
    *>   10.110.3.0/24      0.0.0.0         3                     0      ?
    *                       192.168.2.1     4                     0      100?
    *>   192.168.1.0        0.0.0.0         2                     0      ?
    *                       192.168.2.1     0                     0      100?
    *>   192.168.2.0        0.0.0.0         0                     0      ?
                            192.168.2.1     0                     0      100?
    *>   192.168.3.0        0.0.0.0         0                     0      ?
    *                       192.168.2.1     2                     0      100?
    *>   192.168.4.0        0.0.0.0         0                     0      ?
    *                       192.168.2.1     2                     0      100?
    *>   192.168.5.0        0.0.0.0         2                     0      ?
    *                       192.168.2.1     3                     0      100?

   # Run the display msdp brief command to view the status of the MSDP peers on routers. The following output shows summary information about MSDP peers on RouterB, RouterC and RouterE:

   <RouterB> 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
     192.168.2.2        Up        00:12:27        200    13         0
   

   <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
     192.168.2.1        Up        01:07:08        100    8          0
     192.168.4.2        Up        00:06:39        ?      13         0
   

   <RouterE> 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        00:15:32        ?      8          0
   

   # Run the display msdp peer-status command to view the details about MSDP peers on routers. The following output shows the details about the MSDP peer of RouterB:

   <RouterB> display msdp peer-status
   MSDP Peer Information of VPN-Instance: public net
     MSDP Peer 192.168.2.2, AS 200
     Description:
     Information about connection status:
       State: Up
       Up/down time: 00:15:47
       Resets: 0
       Connection interface: Gigabitethernet1/0/0 (192.168.2.1)
       Number of sent/received messages: 16/16
       Number of discarded output messages: 0
       Elapsed time since last connection or counters clear: 00:17:51
     Information about (Source, Group)-based SA filtering policy:
       Import policy: none
       Export policy: none
     Information about SA-Requests:
       Policy to accept SA-Request messages: none
       Sending SA-Requests status: disable
     Minimum TTL to forward SA with encapsulated data: 0
     SAs learned from this peer: 0, SA-cache maximum for the peer: none
     Input queue size: 0, Output queue size: 0
     Counters for MSDP message:
       Count of RPF check failure: 0
       Incoming/outgoing SA messages: 0/0
       Incoming/outgoing SA requests: 0/0
       Incoming/outgoing SA responses: 0/0
       Incoming/outgoing data packets: 0/0
     Peer authentication: unconfigured
     Peer authentication type: none

   # Run the display pim routing-table command to view the PIM routing table on a router. When S1 (10.110.1.2/24) in PIM-SM1 and S3 (10.110.3.2/24) in PIM-SM3 send multicast data to multicast group G (225.1.1.1), Receiver (10.110.2.2/24) in PIM-SM2 receives the multicast data sent to G. The following output shows the PIM routing tables on RouterB and RouterC:

   <RouterB> display pim routing-table
   VPN-Instance: public net
    Total 0 (*, G) entry; 1 (S, G) entry
    
    (10.110.1.2, 225.1.1.1)
        RP: 10.10.1.1(local)
        Protocol: pim-sm, Flag: SPT EXT ACT
        UpTime: 00:00:42
        Upstream interface: gigabitethernet2/0/0
            Upstream neighbor: 192.168.1.1
            RPF prime neighbor: 192.168.1.1
        Downstream interface(s) information:
        Total number of downstreams: 1
            1: Gigabitethernet1/0/0
                Protocol: pim-sm, UpTime: 00:00:42, Expires:-
   

   <RouterC> display pim routing-table
   VPN-Instance: public net
    Total 1 (*, G) entry; 2 (S, G) entries
    
   (*, 225.1.1.1)
        RP: 10.10.1.2(local)
        Protocol: pim-sm, Flag: WC RPT
        UpTime: 00:13:46
        Upstream interface: NULL, 
            Upstream neighbor: NULL
            RPF prime neighbor: NULL
       Downstream interface(s) information:
        Total number of downstreams: 1
            1: GigabitEthernet2/0/0,
                Protocol: pim-sm, UpTime: 00:13:46, Expires:-
   (10.110.1.2, 225.1.1.1)
        RP: 10.10.1.2
        Protocol: pim-sm, Flag: SPT MSDP ACT
        UpTime: 00:00:42
        Upstream interface: GigabitEthernet1/0/0
            Upstream neighbor: 192.168.2.1
            RPF prime neighbor: 192.168.2.1
        Downstream interface(s) information:
        Total number of downstreams: 1
            1: GigabitEthernet2/0/0
                Protocol: pim-sm, UpTime: 00:00:42, Expires:-
   (10.110.3.2, 225.1.1.1)
        RP: 10.10.1.2
        Protocol: pim-sm, Flag: SPT MSDP ACT
        UpTime: 00:00:42
        Upstream interface: GigabitEthernet3/0/0
            Upstream neighbor: 192.168.4.2
            RPF prime neighbor: 192.168.4.2
        Downstream interface(s) information:
        Total number of downstreams: 1
            1: GigabitEthernet2/0/0
                Protocol: pim-sm, UpTime: 00:00:42, Expires:-