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Configuration Guide - MPLS

S7700 and S9700 V200R011C10

This document describes MPLS configurations supported by the switch, including the principle and configuration procedures of static LSPs, MPLS LDP, MPLS TE, MPLS QoS, MPLS OAM, Seamless MPLS, and MPLS common features, and provides configuration examples.
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Enabling BGP Peers to Exchange Labeled IPv4 Routes

Enabling BGP Peers to Exchange Labeled IPv4 Routes


On a seamless MPLS network, before an E2E BGP LSP is established, BGP peers must be enabled to exchange labeled IPv4 routes with each other.


  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 [ check-tunnel-reachable ]

    The ability to exchange labeled IPv4 routes with a BGP peer is enabled.

    By default, the capability of exchanging labeled IPv4 routes is disabled.

    The check-tunnel-reachable parameter helps prevent a data forwarding failure when the CSG and MASG successfully set up an MP-EBGP peer relationship but a section along the LSP between them fails to be established.

    • If the check-tunnel-reachable parameter is specified:

      When a tunnel between a local and remote device is unreachable, the local device advertises an IPv4 unicast route to its peer. When the tunnel is reachable, the local device advertises a labeled IPv4 route.

    • If the check-tunnel-reachable parameter is not specified:

      The local device advertises a labeled IPv4 route, regardless of whether a tunnel between the local and remote devices is reachable.

Updated: 2019-10-18

Document ID: EDOC1000178315

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