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Configuration Guide - Reliability

S1720, S2700, S5700, and S6720 V200R010C00

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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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).
(Optional) Configuring the DLDP-Compatible Mode

(Optional) Configuring the DLDP-Compatible Mode


This configuration is required if the device works with the following Huawei switches to provide the DLDP function:

  • S8500

  • S7800

  • S6500

  • S5600 series

  • S5100-EI

  • S3900

  • S3500 series

  • S3100 series

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.


In compatible mode, the default BPDU MAC address carried in a DLDP packet is 010F-E200-0001.


  1. Run:


    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    dldp compatible-mode enable

    The DLDP compatible mode is enabled.

    The DLDP compatible mode must be enabled or disabled on both the two interfaces.

  4. Run:

    dldp compatible-mode local-mac mac-address

    The DLDPDUs sent in the DLDP compatible mode contain MAC addresses.

    After the DLDP compatible mode is enabled on the device, the remote device may discover multiple neighbors, which leads to DLDP flapping. The dldp compatible-mode local-mac command can prevent this problem.


    At least one bit in the MAC address must be 0, and the MAC address cannot be a multicast MAC address.

Updated: 2019-08-21

Document ID: EDOC1000141941

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