Example: Configure MPLS over GRE Tunnels

To configure MPLS over GRE tunnels:

1. Enable family mpls under the GRE interface configuration.

[edit interfaces]

interface gr-1/2/0 {

    unit 0 {

        tunnel {

            source 192.168.1.1;

            destination 192.168.1.2;

        }

        family inet {

            address 5.1.1.1/30;

        }

        family iso;

        family mpls;

    }

}

2. Enable RSVP and MPLS over the GRE tunnel.

[edit protocols]

rsvp { 

    interface gr-1/2/0.0;

}   

mpls {

     .....

    interface gr-1/2/0.0;

}       

3. Configure LSPs to travel through the GRE tunnel endpoint address.

[edit protocols]

mpls {

    label-switched-path gre-tunnel {

        to 5.1.1.2;

        .....

    }       

}   

Standard LSP configuration options apply. If the routing table specifies that a particular route will traverse a GRE tunnel, the RSVP packets will traverse the tunnel as well.