I would like to order the following ios:
Cisco 3745 Ser IOS ADV ENT SERVICES
And deploy it on 5 similar routers.Should i order 5 ios or only one ?
Contact whoever you buy your hardware from - they shoud be able to quote for the licences.
Speak to your pre-sales consultant.Ask him the quote for these 5 licenses.
He will help you in this regard.
You need to order five licences to run it on five routers. If you want to get physical media, you only need one.