Cisco NCS 2000 series Troubleshooting Manual page 329

Alarm Troubleshooting
To view the alarm thresholds (as opposed to the warning thresholds), check the Alarm check box on the
Tip
bottom-left of the Optics Thresholds tab and click Reset.
d) Compare the actual Power value with the Alarm Threshold value and complete one of the following actions:
• If the Power value is less than the Fail Low threshold, go to
• If the Power value is greater than the Fail Low threshold plus the alarm hysteresis (allowance value) default of
1 dBm, complete the
If the alarm does not clear, complete the
(1 800 553-2447).
When you replace a card with an identical type of card, you do not need to make any changes to the database
Note
other than restoring the card port to the IS,AINS administrative state.
Step 3 Verify the fiber continuity to the port by following site practices. Refer to the Network Reference chapter of the
Configuration guide for a procedure to detect a fiber cut.
Step 4 Check the Internal Connections file generated by Cisco Transport Planner for the node where the errored card is located.
If necessary, recable the node cabling in accordance with the MP file connections list. To cable a DWDM node, refer to
the Turn Up a Node chapter in the Configuration guide.
Step 5
If the cabling is good, use an optical test set to measure the power value on the output port connected to the alarmed card.
For specific procedures to use the test set equipment, consult the manufacturer. If the power difference reported is greater
than 1 dBm (standard fiber jumper insertion loss is 0.3 dBm), clean the fiber according to site practice. If no site practice
exists, complete the fiber-cleaning procedure in the Maintain the Node chapter of the Configuration guide.
Note Unplugging the fiber can cause a traffic hit. To avoid this, perform a traffic switch if possible. Refer to the
Configuration guide for detailed information.
Step 6 If the port on which the alarm is raised is connected to a remote CRS-1 or ASR 9000 series router, verify that the wavelength
configured on the router interface is the same as that configured for the port. Check the router configuration by using
these steps:
a) Enter the following command on the router to validate the remote node configuration.
show controllers dwdm interface id x/x/x/x
Router>
b) Check the information displayed under Optics Status to verify the configured wavelength.
c) If the wavelength is different from that configured for the port, reset it by entering the following command on the
router in global configuration mode.
Router (config)#
The wavelength configured for the port can be checked in CTC card view.
Note
Step 7 If the alarm does not clear, follow the general troubleshooting rules in the Network Reference chapter in the Configuration
guide for identifying any other upstream alarm in the logical signal flow that could be the root cause of the outstanding
alarm.
If the alarm does not get cleared, you need to report a Service-Affecting (SA) problem. Log into the Technical Support
Website at http://www.cisco.com/c/en/us/support/index.html
Reset a Card in CTC, on page 449
Physically Replace a Card, on page 453
controller dwdm interface id x/x/x/x wavelength channel number
Clear the LOS-P (AOTS, OMS, OTS) Alarm
Step 3, on page
procedure for the card.
for more information or log into
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
283.
procedure and and call Cisco TAC
http://www.cisco.com/c/
283