![]() I'm assuming that this is most likely a driver issue with the Intel cards, but before I give up on trying to make this work, I was curious if anyone else has run into this, or something similar. Nothing in my logs seems to give me any indication of what could be going on. But the 4 way handshake stop with no reply from the client. Uploaded on, downloaded 485 times, receiving a 87. The client are getting '5200 Authentication succeeded ' many time on ISE. Broadcom 802.11ac Wireless Wdi Sdio Adapter 1.596.11.0 For Windows 10 Driver for Windows 7 32 bit, Windows 7 64 bit, Windows 10, 8, XP. The drivers for the Intel cards are up-to-date, and the APs are running 8.5.140. It is related to the 802.11r fast roaming. None of the other devices that we own with AC WLAN cards have any issues connecting using AC. Each of my APs are part of the same AP Group, and use the same RF Profiles. The weird part is that they'll connect to some of my 2802i APs using AC just fine, and not others, and I can't figure out why. Update drivers with the largest database available. Get the latest official Broadcom ac network adapter drivers for Wind,, 8, 7, Vista and XP PCs. This worked for me, but I have the Broadcom ac Network Adapter so this might not work for everyone. I have to switch the cards to use 802.11n in order for them to utilize 5Ghz at all. Uninstall everything in 'Network Adapters'. For whatever the reason, they have issues connecting to some of my 2802i/e APs using 802.11ac. This is probably a very isolated issue, but I've got a couple brand-new ThinkPad T490s laptops with Intel 9560 WLAN cards in them.
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