Setting Up CFM Default Values

Updated on 24 Jan 2024
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The MIP Half-Function (MHF) default parameters control the MHF creation for VIDs that are not attached to a Maintenance Association within a VLAN component. For each component port, a VID is attached to a Maintenance Association at a specific MD level, if at this level a MEP exists on that port or if an Up MEP exists on some other port.

For a given VID, the default MHF MD level plus the set of Maintenance Associations that include that VID define the VID's active MD levels. The MD level at which MHFs could be created on a port for a given VID is the VID's lowest active MD level that is higher than any MEP configured on that port. If at this level the VID is attached to an MA, the MA parameters control the MHF creation. If not, the MHF default parameters control the MHF creation.

To set up CFM defaults

Access the page SOAM ▶CFM ▶Defaults.
A listing of all default parameters is displayed.
Click on a numerical ID number of component ID to edit existing component defaults.
The Detailed SOAM CFM Defaults page appears.

CFM Defaults (SOAM ▶CFM ▶Defaults)

Parameter	Description
Component Id	An unsigned integer identifying the VLAN bridge component in the system.
(Default) MHF MD Level	The default active MD level used by the MHF creation algorithm when no other lower active MD level applies.
(Default) MHF Creation	Indicates if the management entity can create MHFs for VIDs on which no Up MEP is configured. Possible values are: None: No MHFs can be created. Default: Create MHFs if there is no lower active MD level, or if there is a MEP at the next lower active MD level on the component port. Explicit: Create MHFs only if there is a MEP at the next lower active MD level on the component port. Defer: Use the Maintenance Domain parameter to determine whether MHFs can be created.
(Default) MHF Sender ID Permission	Indicates what, if anything, is to be included in the Sender ID TLV transmitted in CCMs, LBMs, LTMs and LTRs Possible values are: None: The Sender ID TLV is not to be sent. Chassis: The Chassis ID Length, Chassis ID subtype, and Chassis ID fields of the Sender ID TLV are to be sent. Manage: The Management Address Length and Management Address of the Sender ID TLV are to be sent. Chassis and Manage: The Chassis ID Length, Chassis ID subtype, Chassis ID, Management Address Length, and Management Address fields are all to be sent.

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