1. The ACTC indicator of the standby SCC board is on. This indicates the active/standby switching is successful, that is, the standby SCC board (83) is active already.
2. Unplug the current active SCC board (83) to switch back to the original active SCC board (82), and find everything recovers to normal.
3. Perform cold reset of the SCC board (82) to switch over forcibly, and the NE becomes unmanageable again. Now log in to the neighboring NE 316 to query the ECC route, but no NE with ID 315 is found.
4. Log in to NE 316 and run :cm-get-bdinfo; to query ECC distribution of the NE. The results are: For the optical board connected directly with NE 315, the ECC number of slot 5 is 1 and the state is normal.
5. Log in to NE 316 and run :cm-get-maccon; to query the link data on the physical layer. The result is: The NE connected directly with slot 5 of the optical board has an ID of 0x0004004e.
6. Log in to the NE with an ID of 0x0004004e. Consequently, we find it is exactly NE 315. We query the IP address and the result is 184.108.40.206, which does not belong to the default network segment 129.9.x.x.
7. Change the NE ID to 9-315, and change the IP address to 220.127.116.11, and the NE resets automatically. Upon successful reset, everything recovers to normal, and the problem is solved.