My BM3.8 is currently set up with a Private & Public interface and is
performing HTTP Proxy, VPN & Firewall services. We are planning on changing
it so the BM server is only doing HTTP Proxy while new Cisco equipment does
the VPN & Firewall.

I think the best way to proceed would be to remove the Public interface from
the BM server because it will no longer be needed (if I'm mistaken please
let me know).

The main question I have is regarding my gateway address. Would you
recommend changing the BM server address which used to be the gateway
address from say 192.168.xxx.254 to another address, and make the new router
address 192.168.xxx.254? Or, keeping the BM address at 192.168.11.254 and
assigning an unused address to the router, say 192.168.xxx.250?

Thanks for any help you can provide,
Mark