create cfm domain mac md-level

create cfm domain mac mac-addr int md-level level


Creates a maintenance domain (MD) in the MAC address + 2-octet integer format and assigns an MD level to that domain.

Syntax Description


Enter a MAC address in the format XX:XX:XX:XX:XX:XX to specify part of the domain name.


Enter the 2-octet integer you want to append to the MAC address to specify the domain name.


Specifies the MD level you are assigning to this domain. Enter a value between 0 and 7.



Usage Guidelines

You can have up to 8 domains on a switch, and each one must have a unique MD level.

You assign each domain a maintenance domain (MD) level, which function in a hierarchy for forwarding CFM messages. The levels are from 0 to 7; with the highest number being superior in the hierarchy.

The IEEE standard 801.2ag specifies different levels for different network users, as follows:
  • 5 to 7 for end users

  • 3 and 4 for Internet service providers (ISPs)

  • 0 to 2 for operators (entities carrying the information for the ISPs)


The following command creates a domain, using the MAC + 2-octet integer format, with the MAC address of 11:22:33:44:55:66 and an integer value of 63; it also assigns that domain an MD level of 2:

create cfm domain mac 11:22:33:44:55:66 63 md-level 2


This command was first available in ExtremeXOS 11.4.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.