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NE40E V800R010C00 Configuration Guide - MPLS 01

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(Optional) Configuring LDP to Automatically Trigger the Request in DoD Mode

(Optional) Configuring LDP to Automatically Trigger the Request in DoD Mode

A remote LDP session must be configured before LDP is configured to automatically send requests in Downstream-on-Demand (DoD) mode

Context

On a large-scale network with a great number of remote LDP peers deployed, DSLAMs that are low-end devices on the edge of the network cannot ensure network stability or prevent wasting resources. Run the remote-ip auto-dod-request command or the remote-peer auto-dod-request command to configure the function of triggering a request to a downstream node for a Label Mapping message associated with all remote LDP peers or a remote LDP peer with a specified LSR ID in DoD mode, which can save system resources.

To disable an LSR from automatically sending a request to a downstream node for a Label Mapping message associated with a specified LSR ID in DoD mode, you can run the remote-ip auto-dod-request block command.

NOTE:
  • A remote LDP session must be configured before the remote-peer auto-dod-request or remote-ip auto-dod-request command is run.

  • Run the longest-match command to configure LDP extension for inter-area LSPs before running the remote-peer auto-dod-request or remote-ip auto-dod-request command.

  • The mpls ldp advertisement dod command must be run to create an LDP session with a downstream node in DoD mode before you run the remote-peer auto-dod-request or remote-ip auto-dod-request command.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    mpls ldp

    The MPLS-LDP view is displayed.

  3. You can perform either of the following procedures to enable a device to automatically send DoD requests for Label Mapping messages to a specified or all downstream remote LDP peers.

    • To enable the device to automatically send DoD requests for Label Mapping messages to all downstream remote LDP peers, run:

      remote-peer auto-dod-request
    • You can perform the following procedures to enable the device to automatically send DoD requests for Label Mapping messages to a specified downstream remote LDP peer.
      1. Run:

        quit

        The system view is displayed.

      2. Run:

        mpls ldp remote-peer remote-peer-name

        The remote MPLS LDP peer is created, and the remote MPLS LDP peer view is displayed.

      3. Run:
        remote-ip ip-address
        The IP address of the remote MPLS LDP peer is configured.
        NOTE:
        • This IP address must be the LSR ID that the remote LDP peer uses to establish the existing remote LDP session.

        • Modifying or deleting the configured address of a remote peer also deletes the remote LDP session.

      4. Run:
        remote-ip auto-dod-request
        The device is enabled to automatically send DoD requests for Label Mapping messages to a specified downstream remote LDP peer.
        NOTE:
        To disable the function of the remote-peer auto-dod-request command, run the remote-ip auto-dod-request block command.

  4. Run:

    commit

    The configurations are committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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