Los (2R) - Cisco NCS 2000 series Troubleshooting Manual

LOS (2R)

b) For the TRUNK-RX port, double-click the card and click the Performance > Optics PM > Historical PM tabs,
choose the port in the Port drop-down list, and click Refresh.
c) Compare the refreshed PM values with the threshold (ensuring that they are above the threshold value) by clicking
the Performance > Optics PM > Current Values tabs.
d) Ensure that a proper threshold has been provisioned for the receive value. (Refer to the Provision Transponder and
Muxponder Cards chapter in the Configuration guide.) If an incorrect threshold has been set, adjust it to a value within
the allowed limits. If instead the alarm condition does not clear, move to next step.
Step 2
Step 3 Determine whether a bulk attenuator is specified by the Cisco TransportPlanner design. If so, verify that the proper fixed
attenuation value has been used.
Step 4
Step 5 Look for any alarm reported by the DWDM cards belonging to the OCHNC circuit whose destination is the faulty
TXP/MXP and first troubleshoot that alarm. Possible alarm related include: amplifier Gain alarms (the
on page 208 alarm, the
page 211 alarm); APC alarms (the
alarm), and LOS-P alarms on the Add or Drop ports belonging to the OCHNC circuit.
If the condition does not clear, log into the Technical Support Website at
for more information or call Cisco TAC (1 800 553-2447).
LOS (2R)
Default Severity: Critical (CR), Service-Affecting (SA)
Logical Object: 2R
The Loss of Signal for a 2R client applies to TXP_MR_10G, TXP_MR_2.5G, TXPP_MR_2.5G, TXP_MR_10E,
TXP_MR_10E_C, TXP_MR_10E_L, and MXP_2.5G_10G cards. The alarm is raised when the card port is
not receiving input. An AIS is sent upstream.
Caution
Always use the supplied electrostatic discharge wristband when working with a powered NCS system. Plug
the wristband cable into the ESD jack located on the lower-right edge of the shelf assembly. To verify cable
continuity, follow site practices.
Clear the LOS (2R) Alarm
SUMMARY STEPS
1. Ensure that the signal entering the Client-Rx port is provisioned with the correct physical-layer protocol.
2. Ensure that the signal feeding the Client-Rx port is provisioned with the correct line speed.
3. Check the PM of the Client-Rx port.
4. Verify that received power is above the optics threshold.
5. Ensure that a proper threshold has been provisioned. (Refer to the Provision Transponder and Muxponder
Cards chapter in the Configuration guide. Refer to the SFP/XFP plug-in specifications located in the
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
272
GAIN-HFAIL , on page 210
APC-CORR-SKIPPED , on page 119
alarm, the GAIN-LDEG , on page 211
alarm or
http://www.cisco.com/c/en/us/support/index.html
Alarm Troubleshooting
GAIN-HDEG ,
alarm, or GAIN-LFAIL , on
APC-OUT-OF-RANGE , on page 120