I am trying to get off one network for another - in short, have two seperate and distinct networks. They exist as the following:
Network 1 Network 2
CSU/DSU Cisco 1700 w/ CSU/DSU
Cisco 2500 PIX 515E (two interfaces)
Basically, I want to maintain the ROUTE for Network 1 for applications looking for 10.210.138.x applications and route all other traffic out to Network 2. Out consultant explained that we need to know the router information on Network 1, but I said that that is just apart of another network and that the Cisco 2500 is just routing the request from the nodes on Network 1, including internet traffic. Basically Network 1 is a self contained network.
Option 1: Add another interface on the PIX 515E, create a NAT for the 10.210.138.X requests and route everything else outbound. The path back for requests on network 1 would be maintained since those requests are coming back across the 2500 and hitting the 515E - it know it is a NAT return and send it along. All other traffic is routed through 10.5.10.X network and no major changes there.
Option 2: Where the switches are now, add another router that would determine what path to take. The only problem I can se with that is that I am sending a request from a different subnet and the host will send it back to the requestors (let say 10.5.10.2) on the host network - in other words it will be either ignored or sent to another path. Unless someone can tell me something different about that router - like that is is wrapping the request or it can do NATing as well, then this options looks meager at best.
For Option 1 - can I add another interface card as another interface and will that work - someone already answered a question about PIX and setting up NATs so I am sure it can do that type of deterministic routing.
Don't forget, Network 1 is just punched down to a switch - no firewall no nothing. Computers on that network are given a 10.210.138.x address and the default gateway is set to the network 1 2500 router.
Any help or insight would be greatly appreciated.