How would you test a router IOS if you only had a router and a switch not on the production network? The router you use for test would be the same as the production network router.
Can be a different router, but it's recommended to have the same IOS version for the pilot probes.
I always try to use the same gear that will go into production, in the pilot/lab.
I'm sorry I wasn't clear on my first post.
The router will be the same and the IOS will be for that particular router model. What kind of "tests" would you perform with just that router and a switch to verify the IOS would function as needed on the production network.