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NE40E V800R010C00 Configuration Guide - MPLS 01

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Enabling BGP Peers to Exchange Labeled IPv4 Routes

Enabling BGP Peers to Exchange Labeled IPv4 Routes

In the inter-AS seamless MPLS+HVPN networking, before an E2E BGP LSP is established between an AGG and MASG, these two BGP peers must be able to exchange labeled IPv4 routes with each other.

Procedure

  • Perform the following steps on each AGG and MASG:
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      bgp { as-number-plain | as-number-dot }

      The BGP view is displayed.

    3. Run:

      peer { ipv4-address | group-name } label-route-capability

      The ability to exchange labeled IPv4 routes between devices in the local AS is enabled.

    4. Run:

      commit

      The configuration is committed.

  • Perform the following steps on each AGG ASBR and core ASBR:
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      interface interface-type interface-number

      The view of the interface connected to the peer ASBR is displayed.

    3. Run:

      ip address ip-address { mask | mask-length }

      An IP address is assigned to the interface.

    4. Run:

      mpls

      MPLS is enabled.

    5. Run:

      quit

      Return to the system view.

    6. Run:

      bgp { as-number-plain | as-number-dot }

      The BGP view is displayed.

    7. Run:

      peer { ipv4-address | group-name } label-route-capability [ check-tunnel-reachable ]

      The ability to exchange labeled IPv4 routes between BGP peers, including the peer ASBR and the devices in the local AS, is enabled.

      • If the check-tunnel-reachable is configured, a local device advertises an IPv4 unicast route to its peer if a tunnel between the local and remote devices is unreachable and advertises a labeled IPv4 route if the tunnel is reachable. This parameter helps prevent a data forwarding failure when an MP-EBGP peer relationship between the CSG and MASG is established but an LSP over the peer relationship fails to be established.
      • If the check-tunnel-reachable parameter is not configured, the local device advertises a labeled IPv4 route, regardless of whether a tunnel between the local and remote devices is unreachable.

    8. Run:

      commit

      The configuration is committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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