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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Configuring CR-LSP Backup Parameters

Configuring CR-LSP Backup Parameters

A backup CR-LSP is established in either hot standby or ordinary backup mode. A hot-standby CR-LSP and an ordinary backup CR-LSP cannot be established simultaneously.

Context

CR-LSP backup is disabled by default. After CR-LSP backup is configured on the ingress of a primary CR-LSP, the system automatically selects a path for a backup CR-LSP.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface tunnel tunnel-number

    The view of the MPLS TE tunnel interface is displayed.

  3. Establish a primary RSVP-TE tunnel
  4. Run mpls te backup { hot-standby [ wtr interval ] | ordinary [ best-effort ] }

    The mode of establishing a backup CR-LSP is configured.

    NOTE:

    The bypass and backup tunnels cannot be configured on the same tunnel interface. The mpls te bypass-tunnel and mpls te backup commands cannot be configured on the same tunnel interface. Also, the mpls te protected-interface and mpls te backup commands cannot be configured on the same tunnel interface.

  5. (Optional) Run mpls te path explicit-path path-name secondary

    An explicit path is specified for the backup CR-LSP.

    NOTE:

    The mpls te path explicit-path path-name secondary and mpls te backup commands must be configured simultaneously.

  6. (Optional) Run mpls te affinity property properties [ mask mask-value ] secondary

    An affinity is set for the backup CR-LSP.

  7. (Optional) Run mpls te hop-limit hop-limit-value secondary

    A hop limit value is set for the backup CR-LSP.

    NOTE:

    mpls te hop-limit hop-limit-value secondary and mpls te backup commands must be configured simultaneously.

  8. (Optional) Run mpls te backup hot-standby overlap-path

    The path overlapping function is configured for the hot-standby CR-LSP.

    By default, a primary CR-LSP and hot-standby CR-LSP are separated. If the network topology does not meet this requirement, the hot-standby CR-LSP cannot be established. The path overlapping function allows a hot-standby CR-LSP to use some links of a primary CR-LSP, to secure the establishment of the hot-standby CR-LSP. The hot-standby and primary CR-LSPs cannot fully overlap.

  9. (Optional) Run mpls te backup hot-standby dynamic-bandwidth

    The dynamic bandwidth adjustment function is enabled for the hot-standby CR-LSP.

    This function enables a hot-standby CR-LSP to obtain bandwidth resources only after the hot-standby CR-LSP takes over traffic from a faulty primary CR-LSP. This function helps efficiently use network resources and reduce network costs.

  10. Run commit

    The configurations are committed.

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Updated: 2019-01-03

Document ID: EDOC1100055103

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