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S12700 V200R013C00 Configuration Guide - Reliability

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, NSR Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, MAC Swap Loopback Configuration, EFM Configuration, CFM Configuration, Y.1731 Configuration.
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(Optional) Enabling Revertive Switching

(Optional) Enabling Revertive Switching


When the active link in a Smart Link group fails, traffic is automatically switched to the standby link. After the fault is rectified, the original active link remains blocked to ensure stable traffic transmission. To enable the original active link to transmit traffic, use either of the following methods:

  • Enable revertive switching in the Smart Link group. Service traffic will be switched to the original active link when the WTR timer expires.
  • Run the smart-link manual switch command to forcibly trigger link switching.
  • Service traffic can be switched between links in a Smart Link group only when both member interfaces are in Up state.

  • Configure revertive switching before enabling the Smart Link group. If the Smart Link group has been enabled, disable the Smart Link group before enabling revertive switching.


  1. Run system-view

    The system view is displayed.

  2. Run smart-link group group-id

    The Smart Link group view is displayed.

  3. Run restore enable

    Revertive switching is enabled for the Smart Link group.

    By default, revertive switching is disabled in a Smart Link group.

  4. Run timer wtr wtr-time

    The WTR time is set.

    By default, the WTR time of a Smart Link group is 60 seconds.

Updated: 2019-04-08

Document ID: EDOC1100065654

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