I've been struggling with both the Cisco 1841 router and ASA 5505 in trying to assign public IP's on 2 vlans I'm trying to create so both vlans can be segmented but have controled traffic between each other via ACL's. The CLI on both the 1841 and the 5505 will not take a public ip on any of there additional eth ports.
I do have a Catalyst 3750 (ws-c3750g-24t-s) downstream from these devices that will allow me to assign a public ip on a port. I'm basically trying trying to split my ISP handoff to two vlans and providing public ip's to both aa well as restricting traffic between the two via ACL's. Since the additional ports on 1841 and 5505 are not true "WIC's", would this Catalyst allow me to acomplish the above said?