C
HAPTER
14
| Basic Administration Protocols
Connectivity Fault Management
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The MIP creation method defined for an MA (see "Configuring
CFM Maintenance Associations") takes precedence over the method
defined on the CFM Domain List.
Configuring Fault Notification
â—† A fault alarm can generate an SNMP notification. It is issued when the
MEP fault notification generator state machine detects that the
configured time period (MEP Fault Notify Alarm Time) has passed with
one or more defects indicated, and fault alarms are enabled at or above
the specified priority level (MEP Fault Notify Lowest Priority). The state
machine transmits no further fault alarms until it is reset by the
passage of a configured time period (MEP Fault Notify Reset Time)
without a defect indication. The normal procedure upon receiving a
fault alarm is to inspect the reporting MEP’s managed objects using an
appropriate SNMP software tool, diagnose the fault, correct it, re-
examine the MEP’s managed objects to see whether the MEP fault
notification generator state machine has been reset, and repeat those
steps until the fault is resolved.
â—† Only the highest priority defect currently detected is reported in the
fault alarm.
Priority levels include the following options:
Table 33: Remote MEP Priority Levels
Priority Level Level Name Description
1 allDef All defects.
2 macRemErrXcon DefMACstatus, DefRemoteCCM, DefErrorCCM, or
DefXconCCM.
3 remErrXcon DefErrorCCM, DefXconCCM or DefRemoteCCM.
4 errXcon DefErrorCCM or DefXconCCM.
5xconDefXconCCM
6 noXcon No defects DefXconCCM or lower are to be reported.
Table 34: MEP Defect Descriptions
Defect Description
DefMACstatus Either some remote MEP is reporting its Interface Status TLV as not isUp,
or all remote MEPs are reporting a Port Status TLV that contains some value
other than psUp.
DefRemoteCCM The MEP is not receiving valid CCMs from at least one of the remote MEPs.
DefErrorCCM The MEP has received at least one invalid CCM whose CCM Interval has not
yet timed out.
DefXconCCM The MEP has received at least one CCM from either another MAID or a lower
MD Level whose CCM Interval has not yet timed out.
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