Whether services are interrupted during SCC board replacement

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Replacement of the SCC board has no impact on traditional services. However, ASON services may be interrupted for a short time when configurations are restored by downloading the NE database.

Other related questions:
Whether the hardware version of the standby SCC board must be the same as that of the active SCC board during the replacement of the standby SCC board
During the replacement of the standby SCC board, the hardware versions of the active and standby SCC boards can be different, but the spare and to-be-replaced SCC boards must be substitutable. In addition, the SCC boards in the subrack housing the to-be-replaced SCC board must be the same type. That is, the active and standby SCC boards must be the same after the replacement.

Whether the software version of the standby SCC board must be the same as that of the active SCC board during the replacement of the standby SCC board
There is no version requirement for the standby SCC board during the replacement of the standby SCC board. This is because that the software needs to be erased using DIP switches before a spare SCC board is used to replace the standby SCC board. After the spare SCC board is inserted to a subrack, the board software of the standby SCC board will be automatically synchronized with the active SCC board.

Whether SCC replacement in a slave subrack affects services
If SCC 1+1 protection has been configured, SCC replacement in a slave subrack has no impact on the system. If SCC 1+1 protection has not been configured, the following impact may be present before the newly configured SCC restarts from the reset triggered during board replacement: 1. The fan speed mode is changed from Auto speed mode to High Speed mode. 2. The ESC or OSC communication of the slave subrack fails. 3. The POWER_FAIL alarm in the slave subrack cannot be reported. 4. Subrack ID conflicts with the ID of the slave subrack cannot be detected. 5. In the slave subrack, some optical-layer boards go offline and cannot be managed, but services are not affected.

Method used to determine whether the new SCC board is initialized when one SCC board in an OSN 6800 subrack equipped with two SCC boards is replaced
The new SCC board will complete the initialization 15 minutes later after being inserted into the slot housing the original SCC board.

Whether database restoration is required when the SCC board in a slave subrack is replaced
No. Database restoration is not required when the SCC board in a slave subrack is replaced.

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