Licence for Load balancer

with hardware platform choice Thomas probably means that you have to choose which hardware appliance you are going to use. but in your case i believe you already have one, it isn't used heavily and you are wondering if you can add an application used by 600 users right?

in principle the answer is yes you can just add that application without any extra licenses. F5 licenses LTM not on users or such. the only thing to keep in mind (also mentioned by Thomas) is the number of SSL connections. but that might not matter in this case, does the application even use SSL?

for more information on that check this SOL: http://support.f5.com/kb/en-us/solutions/public/6000/400/sol6475.html