Cisco ONS 15310-MA - LOF (STM); LOF (VCTRM-HP)

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Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
78-18663-01
Chapter 2 Alarm Troubleshooting
Alarm Procedures
2.7.123 LOF (STM)
Default Severity: Critical (CR), Service-Affecting (SA)
SDH Logical Objects: STM, VCTRM-HP
The LOF alarm occurs when a port on the reporting port has an LOF condition. The alarm indicates that
the receiving ONS 15310-MA SDH has lost frame delineation in the incoming data. LOF occurs when
the SDH overhead loses a valid framing pattern for 3 ms. Receiving two consecutive valid A1/A2
framing patterns clears the alarm.
When the alarm is raised on an STM1 or STM4 port, it is sometimes an indication that the STM1 or
STM4 port expects a specific line rate and the input line rate source does not match the input line rate
of the optical receiver.
Clear the LOF (STM) Alarm
Step 1 Complete the “Clear the LOF (E3) Alarm” procedure on page 2-87.
Step 2 If the alarm does not clear, or if you need assistance conducting network troubleshooting tests, call
Cisco TAC to report a Service-Affecting (SA) problem (1-800-553-2447).
2.7.124 LOF (VCTRM-HP)
Default Severity: Critical (CR), Service-Affecting (SA)
SDH Logical Object: VCTRM-HP
A Loss of Frame alarm for a VC circuit termination indicates that the LOF has occurred at the
terminating point of the circuit (such as an STM-N port). It is similar to the “LOF (STM)” alarm on
page 2-88.
Clear the LOF (VCTRM-HP) Alarm
Step 1 Complete the “Clear the LOF (STM) Alarm” procedure on page 2-88.
Step 2 If the alarm does not clear, log into the Technical Support Website at
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC (1 800
553-2447) in order to report a Service-Affecting (SA) problem.
2.7.125 LOGBUFR90
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SDH Logical Object: SYSTEM
The Log Buffer Over 90 alarm indicates that the per-NE queue of incoming alarm, event, or update
capacity of 5000 entries is over 90 percent full. LOGBUFR90 will clear if CTC recovers. If it does not
clear, LOGBUFROVFL occurs.