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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Setting Switching and Deletion Delays

Setting Switching and Deletion Delays

The switching and deletion delays are set to ensure that a CR-LSP is torn down only after a new CR-LSP has been established, which prevents traffic interruption.


MPLS TE uses a make-before-break mechanism. If attributes of an MPLS TE tunnel, such as bandwidth or path change, a new CR-LSP with new attributes is established. Such a CR-LSP is called a Modified CR-LSP. The new CR-LSP must be established before the original CR-LSP, also called the primary CR-LSP, is torn down. This prevents data loss and additional bandwidth consumption during traffic switching.

If a forwarding entry associated with the new CR-LSP does not take effect after the original CR-LSP has been torn down, a temporary traffic interruption occurs.

The switching and deletion delays can be set on the ingress of the CR-LSP to prevent the preceding problem.


  1. Run system-view

    The system view is displayed.

  2. Run mpls

    The MPLS view is displayed.

  3. Run mpls te switch-delay switch-time delete-delay delay-time

    The switching time and deletion delay time are set.

  4. Run commit

    The configuration is committed.

Updated: 2019-01-03

Document ID: EDOC1100055103

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