After the standby CXL board is switched to the main mode, the communication between the equipment and the NMS fails. Check the relevant information. It is found that the MAC address of the port is changed after the switching, and as a result the network is blocked. In this case, ensure that the router supports different MAC addresses of the same port.
Symptom
The OptiX OSN 2500 forms an STM-4 ring, where there is one gateway NE. During the acceptance test, the standby CXL4 board is switched to the main mode, and then the communication between the NEs and the NMS fails but the corresponding alarms are not reported.
Cause Analysis
The software of the standby CXL board may be different from the software of the main CXL board or the DCN may be faulty.
Procedure
- Access the NE at the local end and the switching of the CXL4 boards is successful. It indicates that the software of the main CXL4 board and the software of the standby CXL4 board are the same.
- Contact the DCN service personnel. It is learnt that the router port in the DCN is already blocked. Although the OptiX OSN 2500 has only one ETH port, the MAC address of this port is still changed when the CXL boards are switched. As a result, the router port is blocked.
- The DCN service personnel enable the two MAC addresses of the same router port. Then, the communication is restored to normal.
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