Example dynamic MS-PW configuration

This section presents an example of how to configure Dynamic MS-PWs for a VLL service between a set of 7210 nodes. The network consists of two 7210 T-PEs and two 7210 playing the role of S-PEs, as shown in the following figure. Each 7210 peers with its neighbor using LDP and BGP.

Figure: Dynamic MS-PW example

The example uses BGP to route dynamic MS-PWs and T-LDP to signal them. Therefore each node must be configured to support the MS-PW address family under BGP, and BGP and LDP peerings must be established between the T-PEs/S-PEs. The appropriate BGP export policies must also be configured.

Next, pseudowire routing must be configured on each node. This includes an S-PE address for every participating node, and one or more local prefixes on the T-PEs. MS-PW paths and static routes may also be configured. When this routing and signaling infrastructure is established, spoke-SDP FECs can be configured on each of the T-PEs.

config
   router
      ldp
         targeted-session
            peer 10.20.1.5
            exit
         exit
      policy-options
         begin
         policy-statement "exportMsPw"
            entry 10
               from
                  family ms-pw
               exit
               action accept
               exit
            exit
         exit
         commit
      exit
      bgp
         family ms-pw
         connect-retry 1
         min-route-advertisement 1
         export "exportMsPw" 
         rapid-withdrawal          
         group "ebgp"
            neighbor 10.20.1.5
               multihop 255
               peer-as 200
            exit
         exit
     exit
config
   service
      pw-routing
         spe-address 3:10.20.1.3
         local-prefix 3:10.20.1.3 create
         exit
         path "path1_to_F" create
            hop 1 10.20.1.5
            hop 2 10.20.1.2
            no shutdown
        exit
     exit
     epipe 1 customer 1 vpn 1 create
        description "Default epipe
             description for service id 1"
        service-mtu 1400
        service-name "XYZ Epipe 1"
        sap 2/1/1:1 create
        exit
        spoke-sdp-fec 1 fec 129 aii-type 2 create
           retry-timer 10
           retry-count 10
           saii-type2 3:10.20.1.3:1
           taii-type2 6:10.20.1.6:1
           no shutdown

config
   router
      ldp
         targeted-session
            peer 10.20.1.2
            exit
         exit
         …
      policy-options
         begin
         policy-statement "exportMsPw"
            entry 10
               from
                  family ms-pw
               exit
               action accept
               exit
            exit
         exit
         commit
      exit
      
      bgp
         family ms-pw
         connect-retry 1
         min-route-advertisement 1
         export "exportMsPw" 
         rapid-withdrawal          
         group "ebgp"
            neighbor 10.20.1.2
               multihop 255
               peer-as 300
            exit
         exit
     exit
config
   service
      pw-routing
         spe-address 6:10.20.1.6
         local-prefix 6:10.20.1.6 create
         exit
         path "path1_to_F" create
            hop 1 10.20.1.2
            hop 2 10.20.1.5
            no shutdown
        exit
     exit
     epipe 1 customer 1 vpn 1 create
        description "Default epipe
             description for service id 1"
service-mtu 1400
        service-name "XYZ Epipe 1"
        sap 1/1/3:1 create
        exit
        spoke-sdp-fec 1 fec 129 aii-type 2 create
           retry-timer 10
           retry-count 10
           saii-type2 6:10.20.1.6:1
           taii-type2 3:10.20.1.3:1
           no shutdown
        exit
        no shutdown
     exit