Can anyone point me towards samples or white papers regarding the setup of a VPN for a wireless LAN at a single building site? The WLAN is all set up on the same vlan using Cisco Aironet 340 access points. The access points are connected to various Cisco switches spread out across 4 floors and then enter the WAN via a Cisco 6509. While I can find several examples regarding multiple sites and remote access, I can not find any examples of a single site using the VPN for security purposes. I am required to set up a VPN. No other options are permissable.