I customer with a layer 2 switch. They are not running vlans. They have access-list running all over the switch. Now on the core switch they have this configuration.access-list 100 permit ip any anyinterface vlan 1ip address 10.1.1.1 255.255.255.0ip ...

I have created a site to site vpn tunnel between the main office and one of our branch office. At the branch office I have configured the ASA 5505 to serve as a dhcp server. Clients at the branch office are able to ping and rdp into the the dns serve...