Step 2
If the QSFP or CFP is not plugged into the port, insert the appropriate QSFP or CFP.
Before you configure the client data rate of the NCS 1002, ensure that the appropriate QSFP or CFP is plugged
into the port of the NCS 1002.
Note
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
for more information or log into
en/us/support/web/tsd-cisco-worldwide-contacts.html
to obtain a directory of toll-free Technical Support numbers for
your country.
LO-RXPOWER Alarm
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
Logical Objects: PPM
The Equipment Low Receive Power (LO-RXPOWER) alarm is an indicator of the received optical signal
power of NCS 1002. This alarm occurs on the client optics controller when the measured individual lane
optical signal power of the received signal falls below the default or user-defined threshold. This alarm occurs
on the trunk optics controller when the total optical signal power of the received signal falls below the default
or user-defined threshold. You can configure the threshold value using the
controller optics R/S/I/P
rx-low-threshold
command in the config mode.
Clear the LO-RXPOWER Alarm
Step 1
Verify the value of the receive power of NCS 1002 using the
show controller optics R/S/I/P
command.
Step 2
If the value is not within the low receive power threshold range, configure the low receive power threshold using the
controller optics R/S/I/P rx-low-threshold
command in the config mode. The range is from -400 to 300 dBm (in units
of 0.1 dBm).
Step 3
If the value is within the range of the low receive power threshold, physically verify, by using a standard power meter
that the optical input power overcomes the expected power threshold. Ensure that a proper threshold has been provisioned
for the receive value. If an incorrect threshold has been set, adjust it to a value within the allowed limits.
Step 4
Verify that the Trunk-Rx port is cabled correctly, and clean the fiber connecting the faulty TXP/MXP to the drop port of
the DWDM card.
Step 5
Determine whether a bulk attenuator is present and if so, verify that a proper fixed attenuation value has been used.
Step 6
Using a test set, check the optical power value of the drop port of the DWDM card connected to the faulty TXP/MXP.
If the read value is different (+1 dBm or 1 dBm) from the ANS setpoint for Padd&drop-Drop power, move to next step.
Step 7
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, Automatic Power
Control (APC) alarms, 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
http://www.cisco.com/c/en/us/support/index.html
for more information or call Cisco TAC (1 800 553-2447).
Troubleshooting Guide for Cisco NCS 1002, IOS XR Release 6.3.x
54
Alarm Troubleshooting
LO-RXPOWER Alarm
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