I have a customer whom has 2 connections at the edge, ISP 1 at Edge A and ISP 2 at Edge B. Each edge is a 2611 router which hands off to a PIX 515 E.
I have an allotment of public addresses from each of the two providers.
I want to place a Mail Server Front End in my DMZ. The DMZ is comprised of the Inside interfaces of the two PIX's just mentioned as well as a 3rd PIX which effectively guards the Inside Perimeter.
My question is this: Can I set up NAT translations on each of the Edges (obviously I can; I want to know if this will work!) for the Mail Server in the DMZ.
The reason that I ask this is that if in fact one of the ISP connections were to fail I would like to have a redundant configuration that would dynamically enable our Customer's Corporate Email to continue functioning.
Thanks in advance!