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Configuration Guide - MPLS

S7700 and S9700 V200R013C00

This document describes the configurations of MPLS, including Static LSP, MPLS LDP, MPLS QoS, MPLS TE, MPLS OAM, Seamless MPLS.
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Enabling BGP Peers to Exchange Labeled IPv4 Routes

Enabling BGP Peers to Exchange Labeled IPv4 Routes

Context

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.

Procedure

  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.

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Updated: 2019-04-08

Document ID: EDOC1100065745

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