That is correct, if you only had 2 systems, but with 3 it is not likely you can do this. I am running into the same problem right now at a customer that has 2 remote sites, and 1 site that connects on the same subnet at the 700 cabinet. For some reason it works with the customers Cisco 1800 router at the 700 location, but they swapped it out for a ASA last week, and took down the 702 (locally connected) cabinet. We are thinking about putting a router in front of the 702 site to see if that will fix their issue.