I just recently setup a Cisco 2504 WLC with 36 Controller based cisco WAP's at a companies corporate office. Now that this project is complete, they what to get their two branch offices on board with wireless. I definitely can't get each branch office their own WLC, but was reading I could use FlexConnect on the WAP's at the branch office, and they could still be controlled from the WLC at the corporate office. I have a site-to-site VPN between the corporate office and the branch office.
Corporate office - 192.168.1.0/22
Branch Office - 192.168.2.0/24
What my question really boils down to is how does the WAP at the remote office find the controller at the corporate office since they are on two different subnets? Again I do have a site to site vpn between sites. What happens if the branch office loses connectivity to the controller. Any assistance would be greatly appreciated. Thanks.