We have two buildings A and B next to each other running 10gb fiber (ATT) between them. Building A CAT 3560 connects to building B CAT 3570 over this fiber cable. Building A has a T3 to internet for data and voice. There is a firewall with 3 interfaces, inside, outside, dmz1, and dmz2. There are CAT 3560 PoE switches and they connect to inside interface of the firewall in building A. The DMZ1 interface of the firewall is connected to a 3500xl. So, basically only building A can use this switch. We would like to retire this switch and we would like to have building B able to use the DMZ1 network as well. All traffic inside or dmz1 should go over the fiber between buildings.
So, my question is is possible to vlan a few ports on the CAT 3560 PoE on building A for DMZ1 and connect it to the DMZ1 of the firewall and then configure a few ports on CAT 3570 PoE for DMZ1 so we can have access to it on building B. I know it has to do something trunking on port 48 of the CAT3560 on building A and port 1 of CAT 3750 on building B.
Thanks advance for your time. if you have sample config that would be great.