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NE40E V800R010C00 Configuration Guide - MPLS 01

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Configuring the Ingress as a PCE Client

Configuring the Ingress as a PCE Client

A PCE client can be configured on the ingress so that the ingress establishes a PCEP session with a PCE server and sends a request to the server over the session to calculate a path.

Usage Scenario

Different from CSPF configured on the ingress, the PCE algorithm allows a PCE server to configure and manage network-wide TE information, including node, link, and tunnel attributes. Some steps are mandatory when CSPF is used, whereas are optional when PCE is used.

If the ingress has to delegate LSPs only in some TE tunnels to the PCE server, the ingress must report information about both delegated and undelegated LSPs to the PCE server, which helps the PCE server correctly calculate global bandwidth information. To implement partial LSP delegation, perform either of the following configurations:
  • Configure the ingress to delegate LSPs in all TE tunnels to the PCE server. Then configure the ingress to report LSP information on a specified tunnel interface to the PCE server and withdraw the LSP delegation from the PCE server.
  • Configure the ingress to report information about LSPs in all TE tunnels to the PCE server, without delegating the LSPs to the PCE server. Then configure the ingress to delegate the LSP on a specified TE tunnel interface to the PCE server.
Perform the following steps on the ingress:

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    pce-client

    The ingress is configured as a PCE server, and the PCE client view is displayed.

  3. Run:

    quit

    The system view is displayed.

  4. Run:

    mpls

    The MPLS view is displayed.

  5. (Optional) Run:

    mpls te pce cleanup lsp-state

    The PCE client is enabled to automatically degrade to use a local path calculation function if a PCEP session fails.

    If a PCE server fails or a PCEP connection is interrupted, to correctly establish an MPLS TE tunnel, the PCE client must be able to automatically degrade to use a local path calculation function. The PCE client can use CSPF (if configured) or routes to establish an MPLS TE tunnel.

  6. Select either of the following solutions:
    • Solution 1:

      1. Run:

        mpls te pce delegate

        The ingress is configured to delegate LSPs in all local TE tunnels to the PCE server.

      2. Run:

        quit

        Return to the system view.

      3. Run:

        interface tunnel tunnel-numbei

        The specified TE tunnel interface view is displayed.

      4. Run:

        mpls te pce passive-delegate report-only

        The ingress is configured to report LSP information on the specified tunnel to the PCE server, without delegating LSPs in the tunnel to the PCE server.

    • Solution 2:

      1. Run:

        mpls te pce passive-delegate report-only

        The ingress is configured to report LSP information on all local tunnels to the PCE server, without delegating LSPs in the tunnels to the PCE server.

      2. Run:

        quit

        Return to the system view.

      3. Run:

        interface tunnel tunnel-numbei

        The specified TE tunnel interface view is displayed.

      4. Run:

        mpls te pce delegate

        The ingress is configured to delegate LSPs on the specified tunnel interface to the PCE server.

  7. Run:

    commit

    The configuration is committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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