I am running an ASA 5505, brand new and I'm trying to configure it to run for the first time. let me explain a bit about the strange topology my network has, however: we have VoIP service with our telco, and so there is a managed switch on the inside of the firewall, managed by the telco, which separates the voice and data traffic. data traffic is running on vlan 2 on the switch. So I'm trying to make my internal interfaces run on vlan 2. But every time I try changing the vlans, it seems to lock me out from getting to the internet! Right now, I have the ASA running in a test environment and this configuration seems to be working for me at the moment, though I don't have a switch connected sending vlan 2 to it currently, just my laptop plugged into port e0/1. Port e0/0 is the uplink to the T1 router. If I switch all the IPs and everything around between VLAN1 and VLAN2, including the ports, it break everything. If I try even using switchport access vlan 2 on port e0/1, it breaks everything. Can anyone help tell me what I'm missing?
Incidentally, this is not even close to finished. This ASA will need to be connected via site-to-site VPN to two other sites and several ports forwarded to inside addresses as well. But this one part is what is really stopping everything else.