I have one 2821 router connected to one 2960 switch, that is then connected to an ASA. I have added a 2960 for switch redundancy. I tried to define another IP in my public subnet on my other internal LAN interface on the router and it wouldn't let me. I was then going to setup HSRP between the two interfaces on the router. Then have the ASA route to the HSRP address. The switches are not routing. I'm not sure how to proceed with the router configuration....
I have this problem too.