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Example: Configuring 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.

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