This document describes the procedure to clear the OPT-LOW alarm in the
OC192-LR2 card on the Cisco ONS 15454 platform.
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The information in this document is based on these software and
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
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The percentage of the normal (100%) optical transmit power of the laser
on the card port represents optical power transmitted (OPT). The high optical
power transmitted (OPT-HIGH) threshold is the percentage of the normal transmit
optical power when a high transmit power occurs. The low optical power
transmitted (OPT-LOW) threshold is the percentage of the normal transmit
optical power when a low transmit power occurs.
The percentage of the normal optical received power of the card port
represents optical power received (OPR). The high optical power received
(OPR-HIGH) threshold is the percentage of the calibrated receive optical power
when a high received power occurs. The low optical power received (OPR-LOW)
threshold is the percentage of the calibrated receive optical power when a low
received power occurs.
The default OPR-LOW value for the 15454 OC192-LR2 card is 50 percent
(15 min/1 day).
The OC192-LR2 card on ONS 15454 receives the OPR-LOW alarm.
Complete these steps in order to clear the OPR-LOW
Go to the Node view.
Double-click the OC192-LR2 card where you want to change the optics
Click the Provisioning tab (see arrow A in
Click Optics Thresholds tab (see arrow B in
Click Set under the Set OPR
column (see arrow C in Figure 1). This option sets
the optical power received, and establishes the received power level as 100
percent. If the received power decreases, the OPR percentage decreases to
reflect the loss in received power. For example, if the received power
decreases by 3 dBm, the OPR decreases 50 percent.
The Set OPR message appears to state that the OPR nominal is set
successfully (see arrow D in Figure 1).
Figure 1 – Set OPR
If the OPR-LOW alarm persists even after you perform this procedure,
check whether the OC192-LR2 card is defective. Try another OC192-LR2