Here is the network scenario: I have two T1's coming into our main building. One is a p2p T1 circuit to a remote office. The other is a basic T1 circuit for Internet connectivity. The far end of the p2p is in the 192.168.3.0 255.255.255.0 network. The local router is an Adtran with an IP of 10.18.0.254. The other T1 comes into a Cisco 1841 which in turn connects to a Pix (10.18.0.2 internally). The network at the main building is 10.18.0.0 255.255.255.0.
Here is what I want to do: Install a Cisco 3550 (with an IP of 10.18.0.253) to handle internal routing and switching. The Pix and Adtran will be plugged into the 3550 (48 port), along with 25 desktops, and a fiber/Ethernet media converter which connects this office to an office next door which houses the data center. I would like to keep everything on the same vlan at this time. I just need the 3550 to differentiate out bound traffic for the Internet or the p2p circuit. Thoughts?