I currently have a Catalyst 4510e doing intervlan routing between multiple Vlans. I want to install an ASA 5540 into the mix which will have a DMZ and another firewalled PCI segment, that is protected by the ASA. Is there a Cisco article that describes designing maybe a dot1q trunk between the ASA and the 4500 so that I can keep using the 4500 as my core router but use the ASA for routing DMZ and PCI VLAN traffic? What I am looking to do is somehow continue managing vlans via the 4500 but having some of those vlans firewalled and routed by the ASA's. Hope this makes sense.