I have setup a port on a 2960 switch that is attaced to my firewall. Everything works fine. My desktop can still see the firewall and get to the internet until I change the mode and vlan of the switch port my desktop is connected to. Then I cannot see the firewall or get to the internet. The client and the firewall are on the same subnet.
My understanding was that trunked ports allowed vlan traffic from any vlan.
What am I missing?