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Configuration Guide - Reliability

S2720, S5700, and S6720 V200R013C00

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, MAC Swap Loopback Configuration, EFM Configuration, CFM Configuration, Y.1731 Configuration.

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Creating an MD

Creating an MD


IEEE Standard 802.1ag-2007 defines for formats for MDs:
  • no-md-name: The MAID field in outgoing CCMs does not carry the MD name.

  • dns-md-format-name: The MD information in the MAID of outgoing CCMs is a character string obtained from the DNS text.

  • mac-md-format-name: The MD information in the MAID of outgoing CCMs consists of 6-byte MAC address plus two-byte integer in the range of 0 to 65535.

  • string: The MD information in the MAID of outgoing CCMs is a character string.

Perform the following operations on the device where Ethernet CFM needs to be configured.


  1. Run system-view

    The system view is displayed.

  2. Run cfm md md-name [ format { no-md-name | dns dns-md-format-name | mac-address mac-md-format-name | string string-md-format-name } ] [ level level ]

    An MD is created and the MD view is displayed.

    By default, an MD is at level 0. Level 0 is the lowest level.

    Only IEEE Standard 802.1ag-2007 supports format, no-md-name, dns dns-md-format-name, mac-address mac-md-format-name, and string string-md-format-name.

    To create multiple MDs, repeat step 2.


    802.1ag packets from a lower-level MD are discarded when being transmitted through a higher-level MD, and 802.1ag packets sent to the MD of the same level are discarded or terminated. 802.1ag packets from a higher-level MD can be transmitted through a lower-level MD.

Updated: 2019-04-04

Document ID: EDOC1100065682

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