Given: ABC Company has a 2-story building and one WLAN controller with six lightweight APs.
The
WLAN controller currently provides coverage to 75% of both floors and an adequate amount of capacity for all client devices. The network manager has decided that ABC Company needs 100% coverage, and the existing WLAN controller will not support any additional APs. The Engineering team is moving upstairs and the Sales team is moving downstairs to keep everyone organized and efficient. There will be an occasional need for members of the Engineering team to work downstairs and for the Sales team to work upstairs, and each team is increasing in size by 10% over the next month.
What is the most cost effective upgrade solution that will yield:
1) Continued support of fast/secure roaming between APs
2) Added network capacity to accommodate the 10% growth
3) 100% coverage on both floors of the facility

A.
Buy a second WLAN controller with additional lightweight APs. Use one WLAN controller for upstairs and the other for downstairs. Put each WLAN controller on its own subnet.

B.
Add autonomous APs where needed to complete coverage. Configure the autonomous APs for preauthentication support and the same SSID used by the WLAN controller. Autonomous APs should be on the same subnet with the WLAN controller.

C.
Turn up the power to all lightweight APs and move the APs to suitable locations to provide 100% coverage. Leave the WLAN controller configured for a single subnet.

D.
Replace the existing WLAN controller with a larger WLAN controller and add additional APs.
Configure two WLAN profiles in the WLAN controller, but continue to use a single subnet.