I'm planning to upgrade my F5 system from v12 to 14.1.2, in F5 download page showing a lot of choices, due my limited experience requesting your advice for which option I have to download.
my current system version is 12 VE.
You cannot use vm image for upgrade. You need iso image:
BIG-IP v14.x >> 184.108.40.206 >> BIGIP-220.127.116.11-0.0.7.iso >> Select Location
thanks a lot for you quick answer, actually I couldn't find this image, would provide any direct link.