I am applying for another BGP AS for another site we are deploying and ARIN asked why we can't use our current AS? Is it possible to use the same AS across multiple sites that are connected to different service providers and have no connections between them?
It is certainly possible to do that. If you need site 1 to communicate with site 2 and vice versa, you will need to use the command "neighbor allowas-in" on the upstream provider connection, so that both sites can receive the updates from the other. I assumed that each site only has one connection to the upstream provider, correct?