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NE40E V800R010C00 Configuration Guide - MPLS 01

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(Optional) Configuring an LSR ID for a Local LDP Session

(Optional) Configuring an LSR ID for a Local LDP Session

To isolate services, configure an LSR ID for each local LDP session.

Context

By default, all LDP sessions of an LSR, including local LDP sessions and remote LDP sessions, use the LSR ID of the LDP instance configured on the LSR. However, if LDP LSPs carry L2VPN and L3VPN services, sharing one LSR ID may cause LDP LSPs to fail to isolate VPN services. To address this problem, you can configure an LSR ID for each LDP session.

This section describes how to configure an LSR ID for a local LDP session.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The view of an interface on which an LDP session is to be established is displayed.

  3. Run:

    mpls ldp local-lsr-id { interface-type interface-number | interface }

    The primary IP address of a specified interface is used as a local LSR ID for the current LDP session.

    You can specify either of the following parameters in this command:

    • interface-type interface-number: uses the primary IP address of a specified interface as a local LSR ID.

    • interface: uses the primary IP address of the current interface as a local LSR ID.

    If multiple links directly connect an LSR pair, the LSR ID configured on the interface of each link must be the same. Otherwise, the LDP session uses the LSR ID of the link that finds the adjacency first while other links with different LSR IDs cannot be bound to the LDP session. As a result, LDP LSP fails to be established on these links.

    If both a local session and a remote LDP session are to be established between an LSR pair, LSR IDs configured for the two sessions must be the same. Otherwise, only the LDP session that finds the adjacency first can be established.

    NOTE:

    Running the mpls ldp local-lsr-id command causes a single-link LDP session to reset or causes the current adjacency of a multi-link LDP session to reset.

  4. Run:

    commit

    The configurations are committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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