Hldovrsync - Cisco NCS 2000 series Troubleshooting Manual

HLDOVRSYNC

DETAILED STEPS
Step 1
Check the PM of the Trunk-Tx port. Verify that received power is above the optics threshold:
a) In node view (single-shelf mode) or shelf view (multishelf mode), double-click the card to display the card view.
b) For the Trunk-Tx port, double-click the card and click the Performance > Optics PM > Historical PM tabs, choose
the port in the Port drop-down list, and click Refresh.
c) Compare the refreshed PM values with the threshold (ensuring that it is above the threshold value) by clicking the
Performance > Optics PM > Current Values tabs.
d) Ensure that a proper threshold has been provisioned for the receive value. If an incorrect threshold has been set, adjust
it to a value within the allowed limits. If instead the alarm condition does not clear, move to next step.
Step 2 Physically verify, by using a standard power meter that the optical output power is overcoming the expected power
threshold. If so, the card should be replaced at first opportunity
Note The higher power level is not a major issue for the DWDM card ( 40MUX, 32WSS-O, or 40WSS-C) connected
to the faulty TXP/MXP, because an internal VOA can automatically decrease the optical power to the expected
level.
Step 3 Complete the Physically Replace a Card, on page 453
If the condition does not clear, log into the Technical Support Website at
for more information or call Cisco TAC (1 800 553-2447).
HLDOVRSYNC
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
Logical Object: NE-SREF
The Holdover Synchronization Mode condition is caused by loss of the primary and second timing references
in the node. Timing reference loss occurs when line coding on the timing input is different from the
configuration on the node, and it often occurs during the selection of a new node reference clock. The condition
clears when primary or second timing is reestablished. After the 24-hour holdover period expires, timing slips
could begin to occur on an ONS system relying on an internal clock.
Clear the HLDOVRSYNC Condition
SUMMARY STEPS
1. Clear additional alarms that relate to timing, such as:
2. Reestablish a primary and secondary timing source according to local site practice. If none exists, refer
to the Turn Up the Network chapter in the Configuration Guide.
DETAILED STEPS
Step 1 Clear additional alarms that relate to timing, such as:
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
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procedure.
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Alarm Troubleshooting