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Configuring the MPLS LSP Tunnel Between the P Routers

In this configuration example, LDP is tunneled over an RSVP LSP. Therefore, in addition to configuring RSVP, you must enable traffic engineering support in an IGP, and you must create an MPLS LSP to tunnel the LDP traffic.

On Router P1, enable RSVP and configure one end of the MPLS LSP tunnel. In this example, traffic engineering support is enabled for OSPF, and you configure MPLS on the interfaces to the LSP and to Router PE1. In the to statement, you specify the loopback address of Router P3.



[edit]
protocols {


rsvp {
interface so-1/0/1.0;
}




mpls {


label-switched-path P1-to-P3 {
to 10.255.100.1;
ldp-tunneling;
}


interface so-1/0/0.0;
interface so-1/0/1.0;
}




ospf {
traffic-engineering;


area 0.0.0.0 {
interface so-1/0/0.0;
interface so-1/0/1.0;
}


}


}

On Router P3, enable RSVP and configure the other end of the MPLS LSP tunnel. Again, traffic engineering support is enabled for OSPF, and you configure MPLS on the interfaces to the LSP and to Router PE2. In the to statement, you specify the loopback address of Router P1.



[edit]
protocols {


rsvp {
interface at-2/0/1.0;
}




mpls {


label-switched-path P3-to-P1 {
to 10.255.2.2;
ldp-tunneling;
}


interface at-2/0/1.0;
interface so-0/0/0.0;
}




ospf {
traffic-engineering;


area 0.0.0.0 {
interface at-2/0/1.0;
interface so-0/0/0.0;
}


}


}

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