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Configuration Guide - MPLS

S7700 and S9700 V200R010C00

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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(Optional) Disabling a Device from Distributing Labels to Remote Peers

(Optional) Disabling a Device from Distributing Labels to Remote Peers

Context

In MPLS L2VPN scenarios using LDP (including Martini VLL, PWE3, and Martini VPLS), PEs at both ends need to establish a remote LDP session. The remote LDP session is only used to transmit Label Mapping messages, so LDP is not required. By default, LDP allocates common LDP labels to remote peers. Many useless idle labels are generated, wasting LDP labels.

To solve the preceding problem, disable a device from distributing labels to remote peers to save system resources. You can use either of the following modes:

  • In the LDP view, disable the PE from distributing labels to all remote peers.

  • In the view of a specified remote peer, disable the PE from distributing labels to the specified remote peer.

Procedure

  • Disable a device from distributing labels to a specified remote peer.
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      mpls ldp remote-peer remote-peer-name

      The remote MPLS LDP peer view is displayed.

    3. Run:

      remote-ip ip-address pwe3 

      LDP is prevented from allocating public network labels to a specified remote peer device.

      By default, the IP address of the remote LDP peer is not configured.

  • Disable a device from distributing LDP labels to all remote peers.
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      mpls ldp

      The MPLS LDP view is displayed.

    3. Run:

      remote-peer pwe3

      LDP is prevented from allocating public network labels to all remote peer devices.

      By default, an LSR is permitted to distribute public network labels to all remote peers.

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Updated: 2019-04-18

Document ID: EDOC1000141902

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