Question moved and completely re-written here.
I have a block of Static IP's from my ISP and I am looking to setup separate network interfaces inside DD-WRT that all go through the single WAN connection I have. I want to assign Static IP's to each of these interfaces and have separate subnet's and gateway's set inside the DD-WRT router. I would like to be able to access each of these subnet's anywhere on the LAN depending upon the Static information I assign in each device.
1 WAN Port 2 WAN network interfaces (Via aliasing or VLAN's, or any other option) 2 Subnets (Routed separately to each of the respective WAN interfaces)
Connect any device on the LAN to either subnet and have that devices traffic routed through which ever WAN interface it is assigned and out of the same WAN Port.
I realize that normally there is only a single WAN network interface that has the physical MAC address of the WAN port, but I'm sure there's a way to create a second virtual interface with a virtual MAC (Random, whatever) and be able to be routed out of the same WAN port. Just not sure how to do it with DD-WRT. Already posted on the forums over at DD-WRT, but haven't gotten a response. Any information is much appreciated.
I cannot have my ISP assign all of the Static IP's to my gateway/router MAC. I have to statically set each network interface. So I essentially need to create a secondary, virtual WAN interface which is routed through the same WAN port, but assigned a different Static IP than the primary, default WAN interface is configured with. This could be resolved with having 2 physical network interfaces and then have them switched together, however, if I'm going to do that, why not just configure it to do essentially just that through virtual interfaces.