Cisco NCS 2000 series Troubleshooting Manual page 131

General Troubleshooting
d) Pull out the LC connector from the TRUNK_TX port of the TXP or MXP card and clean the fiber according to site
practice.
Note If no site practice exists for cleaning fibers, complete the procedure in the Maintain the Node chapter of
the Configuration guide.
If the alarm condition has not cleared, log into the Technical Support Website at
Note
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 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:
• 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 6. 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.)
Step 6
If the TXP or MXP card behaves as expected, check the fiber connection between the two cards:
a) The ADD_RX port of the alarmed 32MUX-O or 40MUX must be connected to the TRUNK_TX port of a TXP or
MXP card using an MPO-LC multifiber cable.
Note A patch-panel tray is normally used to manage fiber connections (for patch-panel cabling details, refer to
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.
d) If necessary, replace any bad devices (maximum tolerance is 1 dB).
e) Pull out the LC connector from the TRUNK_TX port of the TXP or MXP card and clean the fiber according to site
practice.
Note If no site practice exists for cleaning fibers, complete the procedure in the Maintain the Node chapter of
the Configuration guide.
f) If the alarm condition persists, move to Step 7. Otherwise, the problem has been corrected.
Step 7
Verify the correct behavior of the VOA inside the 32MUX-O or 40MUX card:
a) Double-click the card.
b) Click Circuits.
• Delete the OCHNC circuit relating to the faulty channel.
• Ensure that the service state of the corresponding ADD-RX port changes to IS-AINS (or
Unlocked,automaticInService), and that the color turns grey (the LOS-P alarm should clear).
c) In card view, click the Provisioning > Optical Chn > Parameters tabs and identify the proper channel (wavelength).
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
Corrective Action for Scenario A
85