Cisco ONS 15454 Troubleshooting Manual page 430

2.7.397 SSM-STU
The SSM Stratum 4 (ST4) Traceable condition occurs when the synchronization message quality level
is lowered to ST4. The message quality is not used because it is below ST3.
SSM-ST4 is an informational condition and does not require troubleshooting.
Note
2.7.397 SSM-STU
The SSM Synchronization Traceability Unknown (STU) condition occurs when the reporting node is
timed to a reference that does not support SSM, but the ONS 15454 has SSM support enabled. SSM-STU
can also occur if the timing source is sending out SSM messages but SSM is not enabled on the
ONS 15454.
Clear the SSM-STU Condition
In node view, click the Provisioning > Timing > BITS Facilities tabs.
Step 1
Complete one of the following depending upon the status of the Sync Messaging Enabled check box:
Step 2
•
•
Click Apply.
Step 3
Step 4 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.
2.7.398 SSM-TNC
The SSM Transit Node Clock (TNC) Traceable condition occurs when the synchronization message
quality level is changed to TNC.
SSM-TNC is an informational condition and does not require troubleshooting.
Note
2.7.399 STS-SQUELCH-L
Cisco ONS 15454 Troubleshooting Guide, R8.5
2-236
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: BITS, DS1, E1, NE-SREF, OCN
DWDM Logical Object: TRUNK
If the Sync. Messaging Enabled check box for the BITS source is checked, uncheck the box.
If the Sync. Messaging Enabled check box for the BITS source is not checked, check the box.
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: BITS, NE-SREF, OCN
DWDM Logical Object: TRUNK
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: OCN
Chapter 2 Alarm Troubleshooting
November 2009