@nsghs wrote:
We were having an issue where none of our 7260 clients could connect via 802.11a, disabling 802.11a, leaving b/g enabled on the NIC was the only way to get connectivity.
I worked with Aruba support here in Australia and Intel engineering to determine that there was a bug in the driver in handling "Quiet IE" packets. We disabled quiet IE on the controller as a fix while the driver fix is tested and goes into production.
Our configuration is a 3400 controller and AP65's.
this was it for us. OS X devices with ac cards worked fine, interestingly, but our campus's Lenovo Thinkpad Yogas, and new Dells (don't remember the model off the top of my head) all have the Intel Dual Band Wireless-AC 7260 card. I updated to the latest driver from the Lenovo support site (17.0.2.5 - 2014-0416) for the Yoga I'm troubleshooting with, but that still didn't work.
Disabling "Advertise Quiet IE" did the trick, however, can someone tell me what the ramifications of disabling this IE are? I'll put my Google-Fu to use in the meantime, but if someone could let me know, that'd be awesome.