Cisco ONS 15454 Troubleshooting Manual page 427

Chapter 2 Alarm Troubleshooting
Step 3 If the alarm 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.
2.7.385 SSM-LNC
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.
SONET Logical Objects: BITS, NE-SREF, OCN
DWDM Logical Object: TRUNK
The SSM Local Node Clock (LNC) Traceable condition occurs on MXP trunk ports when the SSM (S1)
byte of the SONET overhead multiplexing section has been changed to signify that the line or BITS
timing source is the LNC.
SSM-LNC is an informational condition and does not require troubleshooting.
Note
2.7.386 SSM-OFF
The SSM Off condition applies to references used for timing the node. It occurs when the SSM for the
reference has been turned off. The node is set up to receive SSM, but the timing source is not delivering
SSM messages.
Clear the SSM-OFF Condition
Step 1 Complete the
Step 2 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.
2.7.387 SSM-PRC
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.
SONET Logical Objects: BITS, NE-SREF, OCN
DWDM Logical Object: TRUNK
The SSM Primary Reference Clock (PRC) Traceable condition occurs when the SONET transmission
level for an MXP trunk port is PRC.
November 2009
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Objects: BITS, DS1, E1, OCN
DWDM Logical Object: TRUNK
"Clear the SSM-FAIL Alarm" procedure on page 2-232.
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.7.385 SSM-LNC
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