Hi there!
This time, I will share with you a case about the SHELF-ID-CONFLICT alarm on OSN 6800A.
In country A, the 6800A device of an OLA site is expanded to a new subrack with the version V100R005C00SPC900. When the new subrack is connected, the atomic rack reports the SHELF-ID-CONFLICT alarm, and the receiving power of the downstream optical station is greatly reduced. The NS alarm is reported on the NS3 board. Processing: 1. Due to the decrease in the light collection of the downstream optical station, the logs of the two slots of the two sub-racks of the site are analyzed. It is found that the two boards receive the default attenuation value of 21.5dbm. The configuration command causes the downstream optical power to drop. 2. Continue to check the log and find that when the new subrack is linked to the old subrack, it only differs from the SHELF-ID-CONFLICT alarm reporting time by one second. Further, confirm with the site engineer that the new subrack is powered on first and then through the network cable. Connect to the main subrack. 3. After connecting the network cable, the 12-slot OAU and the 14-slot OBU on the new subrack are applied to the host. After the new subrack is powered on, the network cable is connected to the main subrack. The new subrack control board sends the default configuration to the board after receiving the application for the board. 3. The default configuration command sent by the master is sent to the optical subboard of the service subrack on the main subrack.
Solution
1. Unplug the newly expanded subrack network cable at the site, and the subrack ID conflict alarm of the NE is over.
2. After the soft reset main subrack OAU and the OBU board, the master subrack master delivers the correct configuration and the service is restored.
Suggestions and conclusions:
The 6800A has the subrack ID auto-negotiation function. The subrack ID starts from 1 (the main subrack), and the subrack ID is automatically negotiated between the subracks. The global version of the 6800 is set by the internal jumper of the AUX board. . Therefore, strict operation instructions are required. First connect the master-slave subrack network cable, and then power on the new expansion subrack. Avoid the emergence of new subracks to power on as the main subrack, and the subrack ID conflicts.
That's all, I welcome everyone to leave a message and exchange in the comment area!
Thank you！
