Cisco NCS 2000 series Troubleshooting Manual page 130

Corrective Action for Scenario A
• Enter into the VOA Attenuation Calib field the same value as that of the VOA Attenuation Ref field, but with
the opposite sign (the algebraic sum of the two contributions must be equal to zero).
• Click Apply. If the LOS-P alarm persists, continue with this procedure. Otherwise, the problem has been
corrected.
g) In card view, click Circuits.
h) Delete the OCHNC circuit that relates to the faulty channel.
i) Ensure that the corresponding ADD-RX service state port changes to IS-AINS (or Unlocked,automaticInService)
and that the color changes to grey (the LOS-P alarm should clear).
j) Recreate the OCHNC circuit and verify that the Status field reports DISCOVERED and that the state is IS (Unlocked).
k) If the LOS-P alarm has not cleared, replace the 32WSS card (refer to the Upgrade, Add, and Remove Cards and
Nodes chapter of the Configuration guide). Before you replace the card, 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.
Warning
Step 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:
• The TX laser must be active (trunk port is in IS [or Unlocked] state).
• The wavelength provisioned must be the proper one.
• 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.
If the TX laser is active, the wavelength is provisioned properly, and the output power value is in the correct range, go
to Step 4. Otherwise, take the appropriate corrective action, including card replacement if the output power value is
outside of the expected range (refer to the Upgrade, Add, and Remove Cards and Nodes chapter of the Configuration
guide. Replacing the card should correct the problem.)
Warning High-performance devices on this card can get hot during operation. To remove the card, hold it by the
faceplate and bottom edge. Allow the card to cool before touching any other part of it or before placing
it in an antistatic bag. Statement 201
Step 4 If the TXP or MXP card behaves as expected, the only remaining root cause is the fiber connection between the two
cards:
a) Verify that the ADD_RX port of the alarmed WSS is connected to the TRUNK_TX port of the TXP or MXP card
using an MPO-LC multifiber cable.
A patch-panel tray is normally used to manage fiber connections (for patch-panel cabling details, refer to
Note
the Turn Up a Node chapter in the Configuration guide).
b) Check and clean the LC fiber fan-out according to site practice. The fiber numbers (1 to 8) must correspond to the
wavelength managed.
c) If a patch panel is used, check and, if necessary, clean the LC-LC adapter. If necessary, replace any bad devices
(maximum tolerance is 1 dB).
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
84
High-performance devices on this card can get hot during operation. To remove the card, hold it
by the faceplate and bottom edge. Allow the card to cool before touching any other part of it or
before placing it in an antistatic bag. Statement 201
General Troubleshooting