Cisco NCS 2000 series Troubleshoot Manual

The control card automatically measures span loss every hour, or it calculates it when you perform the Calculate
Span Loss operation. (For procedures to perform this operation, refer to the Manage the Node Manage the
Node.)
To create its span calculation, CTC compares far-end POSC power with the near-end OSC power to create
the span length measurement. The loss is recalculated in each MSTP node, since the OSC channel is regenerated
in each MSTP node.
Clear the SPANLEN-OUT-OF-RANGE Alarm
SUMMARY STEPS
1. Determine the maximum and minimum expected span loss values provided by Cisco TransportPlanner
and confirm that they are correctly entered in CTC.
2. Determine whether the measured span length falls between these two values.
3. If the value falls outside this range, check the following factors in the fibering:
4. Determine whether any site variations are present which conflict with the Cisco TransportPlanner design
and correct them.
DETAILED STEPS
Step 1 Determine the maximum and minimum expected span loss values provided by Cisco TransportPlanner and confirm that
they are correctly entered in CTC.
Step 2 Determine whether the measured span length falls between these two values.
Cisco TransportPlanner determines the span length range according to span length and allocated margins.
Note
Step 3 If the value falls outside this range, check the following factors in the fibering:
• Clearance
• Integrity
• Connection
Step 4 Determine whether any site variations are present which conflict with the Cisco TransportPlanner design and correct
them.
If the condition does not clear, log into the Technical Support Website at http://www.cisco.com/c/en/us/support/index.html
for more information or call Cisco TAC (1 800 553-2447).
SPAN-NOT-MEASURED
SPAN-NOT-MEASURED is a transient condition. For more information about it, refer to the chapter, Transient
Conditions, on page 465.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
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Alarm Troubleshooting
Clear the SPANLEN-OUT-OF-RANGE Alarm

Cisco NCS 2000 series Specifications

General

Brand	Cisco
Model	NCS 2000 series
Category	Network Hardware
Language	English