I am looking for some direction or a specific examples of setting up a site to site VPN using the Sa520w and an ASA5510. the 520 is at the remote location and the ASA is at the main office. Traffic needs to flow in both directions. I have done some test using the wizards on both devices and have had success creating the VPN but have not been able to get traffic to route through the tunnel. any help would be greatly appreciated.
Actually, you can have different subnets on a single IPSEC tunnel with the SA500.
To do this, Create 1 IKE Policy.
Then, create several VPN Policies with the different IP address ranges. On each of these VPN Policies, select the same IKE profile.