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How to reboot the Active device to the standby partition when
two partitions has different firmware version
In some of situation the new firmware with stability issue after upgraded, and user
must to rollback to stable version.
In this scenario user has running Device-HA on partion#1 with 4.33 firmware for a few
months, and upgraded 4.35 firmware to partion#2. But after 1~2 days 4.35 has some
of stability issue even user did not change any configuration. So user would like to
rollback partuion#1. Then user can follow these steps to rollback to standby partition.