Los-P (Trunk) - Cisco NCS 2000 series Troubleshooting Manual

Alarm Troubleshooting
• TXP_MR_2.5G
• TXPP_MR_2.5G
• MXP_MR_2.5G
• MXPP_MR_2.5G
• Every ITU-T line card
If the tested optical transmit optical power is within the expected range, go to
value is outside the specification range, complete the
card becomes active, verify that the LOS-P (OCH) alarm clears. If it does not, continue with
If a spare card is unavailable and the transmit power still functions, you can temporarily clear the LOS-P
Tip
alarm by following the general procedure to add path VOAs during startup failure as noted in the Perform
Node Acceptance Tests chapter of the Configuration guide. For more information about provisioning VOA
setpoints, refer to the Network Reference chapter of the Configuration guide.
Step 9 If the power is within the expected range, return to the port that reported LOS-P and clean the alarmed port's fiber
according to site practice. If no site practice exists, complete the procedure in the Maintain the Node chapter of the
Configuration guide.
Unplugging the fiber can cause a traffic hit. To avoid this, perform a traffic switch if possible.
Note
Step 10 If the alarm does not clear, add path VOAs during startup failure as noted in the Perform Node Acceptance Tests chapter
of the Configuration guide to remedy the problem.
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
c/en/us/support/web/tsd-cisco-worldwide-contacts.html
for your country.

LOS-P (TRUNK)

Default Severity: Critical (CR), Service-Affecting (SA)
Logical Object: TRUNK
The Loss of Signal Payload (LOS-P) alarm for the trunk layer indicates that the incoming payload signal is
absent at the input trunk port. There still may be optical power on the fiber, but the payload data is missing.
This alarm applies to the following cards: TXP_MR_10G, TXP_MR_10E, MXP_2.5G_10G, TXP_MR_2.5G,
TXPP_MR_2.5G, MXP_MR_2.5G, MXPP_MR_2.5G, GE-XP, 10GE-XP, ADM-10G, OTU2_XP,
40G-MXP-C, 40E-MXP-C, 40ME-MXP-C, 40E-TXP-C, 40-ME-TXP-C, and every ITU-T line card.
Note
The MXP_2.5G_10E has no LOS-P (TRUNK) option, because ITU-T G.709 encapsulation on the card cannot
be disabled.
Step 9, on page
Physically Replace a Card, on page
for more information or log into
to obtain a directory of toll-free Technical Support numbers
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
LOS-P (TRUNK)
287. If the actual power
453. When the newly installed
Step 9, on page 287.
http://www.cisco.com/
287