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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) Locking a Backup CR-LSP Attribute Template

(Optional) Locking a Backup CR-LSP Attribute Template

Context

A maximum of three hot-standby or ordinary backup attribute templates can be used for establishing a hot-standby or an ordinary CR-LSP. TE attribute templates are prioritized. The system attempts to use each template in ascending order by priority to establish a backup CR-LSP.

If an existing backup CR-LSP is set up using a lower-priority attribute template, the system automatically attempts to set up a new backup CR-LSP using a higher-priority attribute template, which is unneeded sometimes. If a CR-LSP has been established using the locked CR-LSP attribute template, the CR-LSP will not be unnecessarily reestablished using another template with a higher priority. Locking a CR-LSP attribute template allows the existing CR-LSP to keep transmitting traffic without triggering unneeded traffic switchovers, efficiently using system resources.

Perform the following configurations on the ingress node of an MPLS TE tunnel.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface tunnel tunnel-number

    The tunnel interface view is displayed.

  3. Run:

    mpls te primary-lsp-constraint { dynamic | lsp-attribute lsp-attribute-name }

    An attribute template is specified for setting up a primary CR-LSP.

  4. Run either of the following commands as needed to establish a backup CR-LSP:
    • To establish an ordinary backup CR-LSP, run:
      mpls te ordinary-lsp-constraint number { dynamic | lsp-attribute lsp-attribute-name }
    • To establish a hot-standby CR-LSP, run:
      mpls te hotstandby-lsp-constraint number { dynamic | lsp-attribute lsp-attribute-name }
  5. Run either of the following commands as needed to lock a backup CR-LSP attribute template:
    • To lock an attribute template for an ordinary backup CR-LSP, run:
      mpls te backup ordinary-lsp-constraint lock
    • To lock an attribute template for a hot-standby CR-LSP, run:
      mpls te backup hotstandby-lsp-constraint lock

    NOTE:

    A used attribute template can be unlocked after the undo mpls te backup ordinary-lsp-constraint lock or undo mpls te backup hotstandby-lsp-constraint lock command is run. After unlocking templates, the system uses each available template in ascending order by priority. If a template has a higher priority than that of the currently used template, the system establishes a CR-LSP using the higher-priority template.

  6. Run:

    mpls te commit

    The configuration is committed.

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Updated: 2019-04-18

Document ID: EDOC1000141902

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