How to check if particular Virtual Server exists?

That's actually a really good question, and the answer reveals quite a bit about how BigIP is setup. In short, no, you don't need to have a default pool setup. A Virtual Server is an object that you can assign a bunch of optional behaviors and attributes to - a pool is among them. From an iControl perspective, you'll probably need to specify that there's no default pool though - it doesn't handle default settings like the CLI or GUI does (which is a shame in my opinion).

 

 

-Matt