DataPower XI150 Firmware upgrade steps

Login into data power 

1) Administration -> File Management -> image: Actions -> Upload Firmware image

2) Administration -> System Control -> Shudown -> Select Reload Firmware -> Perform Shutdown

3) Administration -> System Control -> Boot Image -> Select Firmware image -> Perform Boot 

Datapower will restart as part of steps 2 and 3 and you will have to relogin.

You can also perform continuous ping on data power IP to monitor its state (e.g. ping -t datapowerip) while performing steps 1 - 3.