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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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Configuring LDP Extensions for Inter-Area LSPs

Configuring LDP Extensions for Inter-Area LSPs

Pre-configuration Tasks

Before configuring LDP extensions for inter-area LSPs, complete the following tasks:

  • Configure a local LDP session. For details, see Configuring Basic Functions of MPLS LDP.

  • Configure a policy for summarizing routes. For details, see S7700 and S9700 V200R013C00 Configuration Guide - IP Unicast Routing.

LDP extensions for inter-area LSPs enable LDP to search for routes according to the longest match rule and use summarized routes to establish LDP LSPs spanning multiple IGP areas.

Context

Perform the following steps on the ingress or transit node.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run mpls ldp

    The MPLS LDP view is displayed.

  3. Run longest-match

    LDP is configured to search for routes based on the longest match rule to establish LSPs.

    By default, LDP searches for routes to establish LSPs based on the exact matching rule.

    NOTE:

    Configuring this command during LDP GR is not allowed.

Verifying the Configuration

Run the display mpls lsp command to check the setup of inter-area LSPs after LDP is configured to search for routes based on the longest match rule to establish LSPs.

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Updated: 2019-04-08

Document ID: EDOC1100065745

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