Cisco NCS 2000 series Troubleshooting Manual page 129

General Troubleshooting
2. If the alarmed card is a 32WSS or 40WSS-C, verify the incoming power level from the connected TXP,
MXP, or line card. If the alarmed card is a 32MUX-O or 40MUX, go to Step 5.
3. Because the actual power received by the WSS card is lower than expected, verify the correct behavior
of the TXP, MXP, or line card connected to the WSS:
4. If the TXP or MXP card behaves as expected, the only remaining root cause is the fiber connection between
the two cards:
5. When the alarmed card is a 32MUX-O or 40MUX, the troubleshooting procedure should start from the
TXP, MXP, or line card. Verify the correct behavior of the TXP, MXP, or line card connected to the
32MUX-O or 40MUX:
6. If the TXP or MXP card behaves as expected, check the fiber connection between the two cards:
7. Verify the correct behavior of the VOA inside the 32MUX-O or 40MUX card:
DETAILED STEPS
Step 1 Verify the alarm validity:
a) Identify the DWDM nodes where the alarmed card is seated.
b) Double-click the card.
c) Click Alarms.
d) Verify that a LOS-P alarm is present on the ADD-RX port.
e) Click the Synchronize button in the bottom left of the window.
f) If the alarm is correctly reported, move 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
If the alarmed card is a 32WSS or 40WSS-C, verify the incoming power level from the connected TXP, MXP, or line
card. If the alarmed card is a 32MUX-O or 40MUX, go to Step 5.
a) Double-click the WSS card.
b) Click the Provisioning > Optical Chn: Optical Connector X > Parameters tabs to display the optical power
physically coming into the WSS ADD-RX port.
Note
c) Identify the proper channel (wavelength) and read the Power ADD field.
d) If the Power ADD value is less than 4.5 dBm, go to Step 3. If not, click the Provisioning > Optical Chn: Optical
Connector X > Parameters tabs.
Note
e) Identify the correct row based on the Type field (the row must indicate Add in the type field).
f) Decrease the attenuation on the VOA to the minimum (0 dB) to enable channel startup. To perform this adjustment:
• Read the VOA Attenuation Ref value for the channel (wavelength).
X is the number (1 to 45) of the appropriate multifiber MPO connector that manages the alarmed channel
(wavelength).
X is the number (1 to 4) of the appropriate multifiber MPO connector that manages the alarmed channel
(wavelength).
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
Corrective Action for Scenario A
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