I have a question I need an answer on, so hopefully someone has done this in production. We have a trunk coming from a cloud provider, they assign a /31 block, 255.255.255.254 IP for the links. I am labbing this up on 2811 routers and discovered when I use a /31 I cannot ping across the link. Since the actual connection will be layer 2 back to our router, through a series of switches, and will terminate on a subinterface, I have the lab setup as it will be in production. If I use a /30, of course it works fine.
What I need to know is if on the ASR 1001-X if a /31 address will work in this scenario, as in platform specific issues, or older IOS issues. I do know that earlier versions in the same train wont even allow me to do a /31 subnet. I basically can't imagine it not working on the newer platform since cloud providers use a trunk to connect to the customer and route various networks over it using /31 subnets.
