Cisco ONS 15454 Troubleshooting Manual page 309

Chapter 2 Alarm Troubleshooting
The Free Running Synchronization Mode condition occurs when the reporting ONS 15454 is in free-run
synchronization mode. External timing sources have been disabled and the node is using its internal
clock, or the node has lost its designated building integrated timing supply (BITS) timing source. After
the 24-hour holdover period expires, timing slips could begin to occur on an ONS 15454 node relying
on an internal clock.
Note If the ONS 15454 is configured to operate from its internal clock, disregard the FRNGSYNC condition.
Clear the FRNGSYNC Condition
If the ONS 15454 is configured to operate from an external timing source, verify that the BITS timing
Step 1
source is valid. Common problems with a BITS timing source include reversed wiring and bad timing
cards. Refer to the "Timing" chapter in the Cisco ONS 15454 Reference Manual for more information.
If the BITS source is valid, clear alarms related to the failures of the primary and secondary reference
Step 2
sources, such as the
If the condition does not clear, log into the Technical Support Website at
Step 3
http://www.cisco.com/techsupport for more information or call Cisco TAC 1 800 553-2447.
2.7.142 FSTSYNC
A Fast Start Synchronization Mode condition occurs when the node is choosing a new timing reference.
The previous timing reference has failed.
The FSTSYNC alarm disappears after approximately 30 seconds. If the condition does not clear, log into
the Technical Support Website at http://www.cisco.com/techsupport for more information or call
Cisco TAC 1 800 553-2447.
FSTSYNC is an informational condition. It does not require troubleshooting.
Note
2.7.143 FTA-MISMATCH
For information about this alarm or condition, refer to the "Alarm Troubleshooting" chapter in the
Cisco ONS 15454 DWDM Troubleshooting Guide. This guide discusses all DWDM alarms.
2.7.144 FULLPASSTHR-BI
November 2009
SONET Logical Object: NE-SREF
"SYNCPRI" alarm on page 2-241
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: NE-SREF
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: OCN
and the "SYNCSEC" alarm on page
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.7.142 FSTSYNC
2-242.
2-115