[VIP-156] Why My VIP-156 MAC address all become the same?

A: Please do confirm if you’re VIP-156 firmware is before V3.2, it must update to V3.2 first, then update to our last version V3.31:

Update process:
Step 1: VIP156 Version before V3.2 update a middle version V3.2
Step 2: Load factory default 
Step 3: Update V3.31 
Step 4: Load factory default.

Already update and have MAC issue:
1. Update the firmware before V3.2 then follows the update process again.
2. manually update the MAC
2.1 press http:// VIP156 IP/ engineer.htm
2.2 Then choice writeMAC.htm