No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


CLI-based Configuration Guide - Reliability

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides guidance for configuring reliability services, including interface backup, BFD, VRRP, and EFM.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
BFD Echo Function

BFD Echo Function

The BFD Echo function checks the connectivity of the forwarding link by looping back packets. You can use the BFD Echo function when one of two directly connected devices does not support BFD. In this case, you can configure BFD Echo on the BFD-supporting device. That device sends an Echo Request packet to the remote device. The remote device then sends the Echo Request packet back along the same path to detect the connectivity of the forwarding link.


The BFD Echo function only applies to single-hop BFD sessions.


Figure 6-6  BFD Echo

As shown in Figure 6-6, RouterA supports BFD, but RouterB does not. BFD Echo is configured on RouterA to monitor the connectivity of the single-hop path between RouterA and RouterB. Once RouterB receives a BFD Echo packet from RouterA, RouterB loops back the packet at the network layer.

Updated: 2019-08-12

Document ID: EDOC1100034076

Views: 60881

Downloads: 109

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Previous Next