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Configuration Guide - Reliability

S7700 and S9700 V200R011C10

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.
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Configuring Association Between BFD and a Card

Configuring Association Between BFD and a Card


After VRRP is enabled on a switch used as the aggregation device and gateway, VRRP Advertisement packets are forwarded through a Layer 2 switch at the access layer. To improve the VRRP switching performance, associate VRRP with BFD. In this case, BFD packets are also forwarded through a Layer 2 switch at the access layer.

If uplink outbound interfaces of a VRRP group are located on the same card, the card reset may cause a failure to forward user traffic because there is no outbound interface. In this situation, a VRRP active/standby switchover must be performed. The link monitored by BFD is normal and the BFD session does not go Down, so the millisecond-level switching performance cannot be ensured. After a BFD session is associated with a card and the card is set, the BFD session immediately goes Down, triggering the VRRP active/standby switchover. The switching performance is therefore improved.


The S7706 and S7712 support this command only when the MPU is equipped with the ES0D00FSUA00.

The S9706 and S9712 support this command only when the MPU is EH1D2SRUDC00/EH1D2SRUDC01.


  1. Run system-view

    The system view is displayed.

  2. Run bfd-track slot slot-id [ interval second-time ]

    BFD is associated with a card.

    By default, BFD is not associated with a card.

Updated: 2019-10-18

N. documento: EDOC1000178318


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