Alcatel-Lucent 1830 PSS-16 Maintenance And Trouble-Clearing User Manual page 378

Trouble-clearing procedures
LFD
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LFD (GFP Loss of Frame Delineation)
OT port has detected Loss of GFP frame Delineation. This defect indicates that bit stream
in the payload area used for GFP transport has degraded transmission to the point where
boundaries of GFP frames can no longer be reliably detected.
This may be caused by the following reasons:
• Failure in the OCh trail used for transporting GFP layer
• Malfunction of source or sink GFP functions
Severity
Service affecting?
Applicability
Corrective Action
This procedure details the corrective action for clearing an LFD condition declared on an
OT port.
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Inspect the OCh trail which is used as a server transport layer for GFP stream.
1
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2 If any alarms are detected on OCh trail, locate the farthest upstream point and follow the
procedure for clearing this alarm.
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Locate the far end OT that sources the GFP stream.
3
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4 Perform a soft reset of both local and far-end OT.
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If Step 4
5
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6 If Step 5
E
N D O F
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2-128
SA
Yes
112SCX10, 112SX10L, 11QPA4, 11STAR1, 11STMM10,
43SCX4, 4DPA4
does not clear the problem replace far-end OT.
does not clear the problem replace the local OT.
S T E P S
LFD (GFP Loss of Frame Delineation)
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011