Web Management Guide

Chapter 12 | Basic Administration Protocols
Connectivity Fault Management
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◆ Connectivity Check Loop – Sends a trap if this device receives a CCM with the
same source MAC address and MPID as its own, indicating that a forwarding
loop exists.
◆ Connectivity Check MEP Down – Sends a trap if this device loses connectivity
with a remote maintenance end point (MEP), or connectivity has been restored
to a remote MEP which has recovered from an error condition.
◆ Connectivity Check MEP Up – Sends a trap if a remote MEP is discovered and
added to the local database, the port state of a previously discovered remote
MEP changes, or a CCM is received from a remote MEP which as an expired
entry in the archived database.
MEP Up traps are suppressed when cross-checking of MEPs is enabled
11
because cross-check traps include more detailed status information.
Cross-check Errors
◆ Cross Check MA Up – Sends a trap when all remote MEPs in an MA come up.
An MA Up trap is sent if cross-checking is enabled
11
, and a CCM is received from
all remote MEPs configured in the static list for this maintenance association
12
.
◆ Cross Check MEP Missing – Sends a trap if the cross-check timer expires and
no CCMs have been received from a remote MEP configured in the static list.
A MEP Missing trap is sent if cross-checking is enabled
11
, and no CCM is
received for a remote MEP configured in the static list
12
.
◆ Cross Check MEP Unknown – Sends a trap if an unconfigured MEP comes up.
A MEP Unknown trap is sent if cross-checking is enabled
11
, and a CCM is
received from a remote MEP that is not configured in the static list
12
.
Web Interface
To configure global settings for CFM:
1. Click Administration, CFM.
2. Select Configure Global from the Step list.
3. Before enabling CFM processing on the switch, first configure the required CFM
domains, maintenance associations, and static MEPs. Then set the delay time to
wait for a remote MEP comes up before the switch starts cross-checking the
end points learned through CCMs against those stored in the static list.
4. Adjust the parameters for the link trace cache as required.
11. Cross-checking must be enabled for this type of trap to be reported (see "Configuring CFM
Maintenance Associations").
12. See "Configuring Maintenance End Points".