Possible causes of an ODUK_PM_OCI alarm on a board

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The possible causes of an ODUK_PM_OCI alarm on a board are as follows:

1. An ODUK_PM_OCI alarm occurs on the corresponding board in the upstream.

2. A loopback occurs on the peer board.

3. No cross-connections or incorrect cross-connections are configured on the peer board.

Other related questions:
Possible causes of a power threshold-crossing alarm on an OA board
The possible causes are as follows: 1. If the upstream board outputs optical power at a normal level but the local board receives excessively high optical power, the cause may be that no appropriate attenuator is added. 2. The peer board or the upstream board outputs excessively high optical power. 3. The board at the local station is faulty.

Possible causes for the CHAN_ADD alarm on the MCA board of the OSN 6800/8800
The CHAN_ADD alarm indicates that single-wavelength signals are added. This alarm is generated when the MCA board detects wavelength addition after it scans the optical spectrum. The possible causes of the CHAN_ADD alarm are as follows: 1. The configurations for wavelength monitoring are incorrect. The received wavelengths are not configured as the monitored wavelengths. 2. The MCA board is faulty. The procedure for handling the CHAN_ADD alarm is as follows: 1. On the U2000, check whether the configurations for wavelength monitoring of the MCA board are incorrect. If the configurations are incorrect, modify the configurations to ensure that the monitored wavelengths and the number of monitored wavelengths are consistent with the received wavelengths and the number of received wavelengths. 2. If the alarm persists, test the optical spectrum data of the input optical signals using an optical spectrum analyzer. If the data is normal, the optical spectrum analyzer module of the MCA board may be faulty. When this occurs, replace the MCA board.

Possible cause of the OTU3_LOF alarm that is transiently reported by the NS3 board on the OSN 8800
The possible cause is that the embedded TDC module on the NS3 board is faulty. In general, the alarm can be cleared after the NS3 board is replaced.

How to clear MAC address flapping alarms on an AC
The possible causes for MAC address flapping alarms are as follows: - The interfaces where a loop occurs are added to the same VLAN. - Cables are connected incorrectly. - A loop occurs on the network. Troubleshooting procedure: 1. Connect cables on the interfaces correctly and check whether the alarm persists. If so, go to step 2. If not, go to step 6. 2. Check whether the two interfaces that learn the same MAC address can be added to different VLANs based on the network topology. If yes, go to step 3. If not, go to step 4. 3. Add the two interfaces to different VLANs, and check whether the alarm persists. If so, go to step 4. If not, go to step 6. 4. Disable loop detection and enable STP. Check whether the alarm persists. If so, go to step 5. If not, go to step 6. 5. Contact Huawei technical personnel. 6. End.

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