I have a setup with 1 ASA5520 with 4 interfaces. I need to connect 2 core switches (Cat65xx) to two of the interfaces, while another 2 interfaces goes to the internet router and the dmz respectively. The core switches are running in a redundant topology setup, and the 2 links to the firewall are supposed to be running simultaneously (ASA running in routed mode, the 2 internal links are routed links).
My question is:
Can i use 1 of the network port on the ASA and set it up as a trunked link with 2-3 vlans? All the hosts in those vlans will be forced to use the ASA as its default gateway.