I am currently working on configuring a network diagram that will be ISP1/ISP2--->2621---->PIX 506E---->2912. I want to run NAT and terminate vpn clients on the pix. I have 2FE and 1 NM-1E on the 2621 to allow ISP1 and ISP2 (ADSL) connections to the 2621. Reason being is I want to have some sort of failover/load balancing if possible.
My confusion point right now is the ip addressing on the 2621.
If I have static IP's from both ISP's and I'm going to nat on the PIX what would my IP's be on the 2621 internal interface and pix external interface? I am assuming on the 2621 there will need to be static routes from the external interfaces to the internal interface.