Hi,
From time to time I have a few clients that can't connect to my wireless network. Out of 150 clients per day, I woud say that I hear of five or siz people per week that have problems connecting. All have up-to-date drivers and the types of users and laptops vary. If I could pinpoint anything, I'd say it tends to happen more when a user goes from being docked on the wired network to being on wireless as they move to a meeting room.
It is proving very difficult to nail down, but I believe it has something to do with how the Aruba controllers is talking to my Windows RADIUS servers. On one particular occasion, I had a client which wouldn't connect, even without a reboot. So I switched the RADIUS server order around in my RADIUS server group, and the client connected right away.
I setup client debugging and what I see is that the client associates, but then times out and deauths itself. A sh auth-tracebuf shows the EAP exchange start, but after the controller sends an EAP-REQ, it receives no response from the client.
I noticed the following statistics on the controller in regards to RADIUS , and it has high timeouts as well as showing the RADIUS. servers up for only a short amount of time.
One of the RADIUS servers is on the same LAN as the controller, the other is in the US accessed via a WAN link.
I've had the Windows guys log everything, but they can't seem to find anything wrong.
Here's some output, I would appreciate any help with trying to work this out. We are running AOS6.1.3.3
RADIUS Server Statistics
------------------------
Statistics ukradius0 usradius3
---------- -------- --------
Accounting Requests 12621 16170
Raw Requests 203134 233577
PAP Requests 0 0
CHAP Requests 0 0
MS-CHAP Requests 0 0
MS-CHAPv2 Requests 0 0
Mismatch Response 7 2
Bad Authenticator 0 0
Access-Accept 12837 13920
Access-Reject 798 811
Accounting-Response 12621 16170
Access-Challenge 188658 217231
Unknown Response code 0 0
Timeouts 3378 6505
AvgRespTime (ms) 11 115
Total Requests 215755 249747
Total Responses 214921 248134
Uptime (d:h:m) 0:0:5 0:1:39
SEQ Total/Free 255/255 255/255
#AP115