Logbufrovfl; Clear The Logbufrovfl Alarm; Lo-Laserbias; Lop-P - Cisco ONS 15600 SDH Troubleshooting Manual

2.6.119 LOGBUFROVFL

2.6.119 LOGBUFROVFL
The Log Buffer Overflow alarm indicates that the CTC per-NE queue of incoming alarm, event, or
updates, which has a capacity of 5,000 entries, has overflowed. This happens only very rarely. However
if it does, you must restart the CTC session. It is likely that some updates will have been missed if this
alarm occurs.

Clear the LOGBUFROVFL Alarm

Restart the CTC session.
Step 1
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 2
for more information or call Cisco TAC (1-800-553-2447).

2.6.120 LO-LASERBIAS

For information about this condition, refer to the "Alarm Troubleshooting" chapter of the
Cisco ONS 15454 DWDM Troubleshooting Guide.

2.6.121 LOP-P

A Loss of Pointer Path alarm indicates that the transmitted optical circuit size is different from the
provisioned optical circuit size. LOP-P occurs when valid H1/H2 pointer bytes are missing from the
SDH overhead. Receiving equipment monitors the H1/H2 pointer bytes to locate the SDH payload. An
LOP-P alarm means that eight, nine, or ten consecutive frames do not have valid pointer values. The
alarm clears when three consecutive valid pointers are received.
One of the conditions that can cause this alarm is a transmitted VC circuit that is different from the
provisioned VC. This condition causes a mismatch of the path type on the concatenation facility. It
occurs when there are eight to ten new data flags received, or eight to ten invalid pointers. For example,
if an VC4 or VC3 is sent across a path provisioned for VC4-4c, an LOP alarm occurs.

Clear the LOP-P Alarm

Complete the
Step 1
"Initiate a 1+1 Protection Port Force Switch Command" procedure on page 2-123
Step 2 Use a test set to verify that the incoming signal is valid; refer to the "Create Circuits" chapter in the
Cisco ONS 15600 SDH Procedure Guide for instructions on testing optical circuits. If the upstream
signal is not valid, troubleshoot upstream.
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
2-84
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Object: SYSTEM
Default Severity: Critical (CR), Service-Affecting (SA)
Logical Object: VCMON-HP
"Initiate a Force Switch for All Circuits on a SNCP Span" procedure on page 2-126
Chapter 2 Alarm Troubleshooting
or the
as appropriate.
July 2010