Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 593)

Brocade 6910 Ethernet Access Switch Configuration Guide 543
53-1002581-01
CFM Commands
25
ethernet cfm cc enable
This command enables the transmission of continuity check messages (CCMs) within a specified
maintenance association. Use the no form to disable the transmission of these messages.
Syntax
[no] ethernet cfm cc enable md domain-name ma ma-name
domain-name – Domain name. (Range: 1-43 alphanumeric characters)
ma-name – Maintenance association name. (Range: 1-43 alphanumeric characters,
maximum length is 44 minus the length of the domain name)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• CCMs are multicast periodically by a MEP in order to discover other MEPs in the same MA, and
to assure connectivity to all other MEPs/MIPs in the MA.
• Each CCM received is checked to verify that the MEP identifier field sent in the message does
not match its own MEPID, which would indicate a duplicate MEP or network loop. If these error
types are not found, the CCM is stored in the MEP’s local database until aged out.
• If a maintenance point fails to receive three consecutive CCMs from any other MEP in the same
MA, a connectivity failure is registered.
• If a maintenance point receives a CCM with an invalid MEPID or MA level or an MA level lower
than its own, a failure is registered which indicates a configuration error or cross-connect error
(i.e., overlapping MAs).
Example
This example enables continuity check messages for the specified maintenance association.
Console(config)#ethernet cfm cc enable md voip ma rd
Console(config)#