Chapter 13
| Basic Administration Protocols
Connectivity Fault Management
– 497 –
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:
Parameters
These parameters are displayed:
Creating a Maintenance Domain
◆ MD Index – Domain index. (Range: 1-65535)
Table 31: 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 32: 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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