I have a Cisco 4400 Series WLAN Controller not working with Intel® Dual Band Wireless-AC 8260.
If I set the WLAN Adapter setting on the computer o Wireless Mode 2 (802.11B) it works, but if I leave it at any other options (e.g. 6 802.11 A/B/G) it responds really slow.
For testing I hooked up a Linksys Wireless Router E6400 my network and was able to connect to both 2.4 Ghz or 5 Ghz channels and was able to browse the internet without any issues.
Is there anything I can do with the Cisco that will make it work with the Intel® Dual Band Wireless-AC 8260