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NE40E V800R010C00 Configuration Guide - MPLS 01

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(Optional) Setting Leaf Switching and Deletion Delays

(Optional) Setting Leaf Switching and Deletion Delays

To prevent two copies of traffic on a P2MP TE tunnel's egress, a leaf CR-LSP switchover hold-off time and a deletion hold-off time can be set for MBB.

Context

Before the primary sub-LSP is deleted, both the primary sub-LSP and Modified sub-LSP carry traffic. If the egress cannot receive traffic only from one sub-LSP, two copies of traffic exist. To prevent two copies of traffic, perform the following steps to reset the leaf CR-LSP switchover hold-off time and deletion hold-off time.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    mpls

    MPLS is enabled globally and the MPLS view is displayed.

  3. Run:

    mpls te

    MPLS TE is enabled globally.

    A leaf CR-LSP switchover hold-off time and deletion hold-off time can be set only after MPLS TE is enabled globally.

  4. Run:

    mpls te p2mp-te leaf switch-delay delete-delay

    A leaf CR-LSP switchover hold-off time and deletion hold-off time are set.

    NOTICE:
    After the mpls te p2mp-te leaf switch-delay delete-delay command is run, traffic may be interrupted if an ingress is idle but the egress is busy. In this situation, either of the following may occur:
    • The Modified sub-LSP has been ready on the ingress and the primary sub-LSP has been deleted, but the Modified sub-LSP is not ready on the egress. If this occurs, when the ingress switches traffic to the Modified sub-LSP, traffic is temporarily interrupted.

    • The primary sub-LSP has been deleted, but the Modified sub-LSP failure message cannot be immediately sent to the ingress. If this occurs, traffic is temporarily interrupted.

  5. Run:

    commit

    The configuration is committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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