cfm default md

Function

The cfm default md command creates a default MD.

The undo cfm default md command deletes a default MD.

By default, the level of a default MD is 7.

Format

cfm default md [ level level ]

undo cfm default md

Parameters

Parameter	Description	Value
level level	Specifies the level of a default MD.	The value is an integer ranging from 0 to 7. A larger value indicates a higher MD level.

Parameter

Description

Value

level level

Specifies the level of a default MD.

The value is an integer ranging from 0 to 7. A larger value indicates a higher MD level.

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
y1731	write

Usage Guidelines

Usage Scenario

To use the LB and LT functions to detect link faults, run the cfm default md command to create a default MD.

The default MD must have a higher level than all MDs to which MEPs configured on the local device belong. In addition, the default MD must have the same level as a high-level MD. The default MD is used to transmit high-level continuity check messages (CCMs) and create maintenance association intermediate points (MIPs) to send linktrace reply (LTR) messages.

After a default MD is created, a MIP are created in the MA that is not associated with a VLAN based on the default MD. The interface on which the default MD resides generates a MIP based on MIP generation rules.

Prerequisites

CFM has been globally enabled using the cfm enable command in the system view.

Precautions

To change the level of a default MD, delete the default MD and re-create a default MD. Deleting the default MD will delete all information about the MIPs associated with the default MD.

Example

# Create a default MD at level 6.

<HUAWEI> system-view
[~HUAWEI] cfm enable
[*HUAWEI] cfm default md level 6