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Enable Device HA Pro on Device 2
After firmware downgrade is finished on Device 2, reset Device 2 to factory
default settings. Enable Device HA Pro on Device 2. Connect heartbeat port
between Device 1 and Device 2 to have Device 2 perform full synchronization.
Test the Result
After firmware upgrading is finished on two devices, Device 1 is active mode of HA Pro.
Device 2 becomes passive mode after it is fully synchronized with Device 1 while
heartbeat port is connected.
Active (Device 1)- Running Firmware 4.33(ABFU.1)
Note: On Device 2, upload the old firmware to the same firmware partition as Device 1.
For example, the old firmware is uploaded to partition 1 on Device 1. Then the old firmware
must also be uploaded to partition 1 on Device 2.
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