Cisco NCS 2000 series Troubleshooting Manual page 137

General Troubleshooting
a) Identify the DWDM node where the alarmed card is located.
b) Double-click the card (either the 32MUX-O, 32WSS, 40MUX, or 40WSS-C card).
c) Click Alarms.
d) Verify that an Optical Power Degrade Low (OPWR-LDEG) alarm is present on the ADD-RX port.
e) Click the Synchronize button at the bottom left of the window.
f) If the alarm is correctly reported, go to Step 2. If not, close the CTC application, delete the CTC cache, and open the
CTC connection again.
Note If the alarm inconsistency persists, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in order to
report a service-affecting problem.
Step 2
Step 3
a) In card view, click the Provisioning > Optical Chn: Optical Connector X > Parameters tabs.
Note X is number (1 to 45) of the proper multi-fibers MPO connector that manages the alarmed channel
(wavelength).
b) The Power field value must be the same as the VOA Power Ref field. If it is not, take the appropriate corrective action
for the alarm according to
Step 4 Verify the correct behavior of the TXP, MXP, or line card that is the signal source of the channel (wavelength) that is
alarmed:
a) The TX laser must be active (trunk port is in IS [unlocked] state).
b) The wavelength provisioned must be the proper one.
c) The output power value must be within the expected range (refer to the Configuration guide). If the trunk port PM
is not available through CTC, perform a manual measurement using a standard power meter.
Step 5 If the cards referenced in Step 3 and Step 4 are operating properly, go to Step 6. If not, take the appropriate corrective
actions according to the alarm raised on the card (see
Step 6 If the alarmed card is a 32MUX-O or 40MUX card, go to Step 8.
Step 7
If the alarmed card is a 32WSS or 40WSS-C card, verify the proper cabling of the EXP_RX port (common input port
for all pass-through channels) on the WSS card:
a) Verify that the EXP_RX port of the alarmed WSS card is connected to the EXP_TX port of the coupled WSS card
on the opposite side of the node.
b) Pull out the LC connector from the EXP_RX port of the WSS card and clean the fiber according to site practice.
c) Pull out the LC connector from the EXP_TX port of the coupled WSS card and clean its connector also.
d) Verify that the fiber attenuation is within the specifications (maximum tolerance is 1 dB).
e) If necessary, replace any bad fibers.
Before disconnecting any optical amplifier card fiber for troubleshooting, ensure that the optical amplifier
Note
card is unplugged.
If no site practice exists for cleaning fibers, complete the procedure in the Maintain the Node chapter of
Note
the Configuration guide.
Note If the alarm condition persists even after the cabling check/fixing, the root cause could be related to a
network issue and a more accurate analysis of the signal flow is needed according to the actual system
topology. If necessary, call Cisco TAC (1 800 553-2447) for help.
Alarm Troubleshooting, on page 99
Alarm Troubleshooting, on page
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
Condition B2 - OPWR-LowDEGrade Alarm
99).
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