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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.
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Configuring the BFD Echo Function

Configuring the BFD Echo Function

Pre-configuration Tasks

The BFD Echo function detects fast detect faults on directly connected links.

Before configuring the BFD Echo function, complete the following tasks:

  • Connect interfaces properly.

  • Correctly configure an IP address for the Layer 3 interface.

Configuration Process

Figure 6-18  Configuration process of the BFD Echo function

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run bfd

    BFD is enabled globally and the BFD view is displayed.

    By default, BFD is disabled globally.

  3. Run quit

    Return to the system view.

  4. Run bfd session-name bind peer-ip peer-ip [ vpn-instance vpn-instance-name ] interface interface-type interface-number [ source-ip ip-address ] one-arm-echo

    A BFD session supporting the BFD Echo function is configured.

    By default, the BFD Echo function is not configured.

    NOTE:
    • The BFD Echo function is only applicable to single-hop BFD sessions.

    • A BFD session currently does not detect route switching. If the change of bound peer IP address causes a route to switch to another link, the BFD session is negotiated again only when the original link fails.

  5. Run discriminator local discr-value

    The discriminator for the BFD session is configured.

    You can only configure the local discriminator because the BFD Echo function is only configured on one device supporting BFD.

  6. Run commit

    The configuration is committed.

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Updated: 2019-08-12

Document ID: EDOC1100034076

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