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S12700 V200R010C00 Configuration Guide - Reliability

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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Enabling DLDP

Enabling DLDP


Unidirectional links can be detected only when the devices on both ends of optical fibers or copper twisted pairs support DLDP functions.

DLDP can be configured on Layer 2 and Layer 3 Ethernet interfaces. By default, an Ethernet interface works in Layer 2 mode. Before configuring DLDP on a Layer 3 Ethernet interface, switch the Ethernet interface to Layer 3 mode.


  1. Run:


    The system view is displayed.

  2. Run:

    dldp enable

    DLDP is enabled globally.

    By default, DLDP is disabled globally and on each interface.

  3. Run:

    interface interface-type interface-number

    The interface view is displayed.


    DLDP cannot be configured on logical interfaces.

  4. Run:

    dldp enable

    DLDP is enabled on the interfaces.

Updated: 2019-08-21

Document ID: EDOC1000142090

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