Please note: Firmware ver. 4.00 and later is only suitable for the following models:
DGS-1100-10MPV2 / 10MPPV2 / 16V2 / 18PV2 / 24V2 / 24PV2 / 26MPV2 / 26MPPV2

If your switch is running firmware 1.xx or 2.xx please update to ver. 3.00.025 first. 
After loading firmware 3.00.025 please make sure your switch boots up with this firmware (Tools > Firmware Information > select 3.00.024 as "Boot Up").
Reboot the switch (Tools > Reboot System).

Once the switch is running firmware 3.00.025 or later you can upgrade to ver. 4.00.019:

1. Load firmware DGS-1100V2_Ax_FW_v4.00.019.bin and select it as Boot Up firmware (Tools > Firmware Information > select 4.00.019 as "Boot Up")
Reboot the switch (Tools > Reboot System).

2. Upgrade switch Boot ROM to ver. 1.13 (Tools > Boot ROM Upgrade from HTTP). Load Boot ROM file DGS-1100V2_Ax_BOOT_Ver1.13.bin.

3. It is recommended to also load DGS-1100V2_Ax_FW_v4.00.019.bin firmware as second image so both Image 1 and Image 2 have the same firmware ver. 4.00.019


Please refer to firmware release notes for detailed instructions. 
