RE: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-29 Thread Foggi, Nicola
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN Jorge, Thanks for the response. We are using Cisco AP 1131 and AP 1242 - we don't use a controller, only WLSE to manage. We have the basic default radio settings enabled

RE: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-29 Thread Chris Hessing
Title: RE: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN Have you looked in your logs to see if the aps are changing channels? I know older versions of the IOS would only pick a channel on boot, but it seems like newer ones do it during normal operation. We had

RE: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-28 Thread Ruiz, Mike
:49 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN Here's an example of the Intel 2100 roaming algorithm. This is an old card and EOLd but is sheds some light on why it has major problems... When the device driver

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-28 Thread Jorge Bodden
Shumon, We used to have the same problem when we had the Aironet solution a couple of years back. It was actually due to the APs sending a re-association packet/frame to the device, even if that device was directly underneath the AP. What type of platform are you currently running your

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-28 Thread Colleen Szymanik
Jorge, Thanks for the response. We are using Cisco AP 1131 and AP 1242 - we don't use a controller, only WLSE to manage. We have the basic default radio settings enabled. We tried turning off the non-aironet extensions and the problem still persists. The intervals seem to be regular - for

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-28 Thread Shumon Huque
Fascinating discussion .. thanks for all the comments and suggestions. Clearly AP transitions in an authenticated WLAN are very costly. We'll continue tuning the AP deployment to see if we can minimize them (as Julian is doing on his campus). But judging from this thread, a large part of the

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-28 Thread Shumon Huque
On Wed, Sep 27, 2006 at 11:26:49PM -0500, Frank Bulk wrote: Shumon: Vendors have bandied about different authentication rates for RADIUS servers. What kinds of rates are you seeing, 50 auths/sec reasonable? Frank Hmm, I think that any quoted numbers would have to be accompanied by

RE: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-28 Thread Frank Bulk
-Original Message- From: Shumon Huque [mailto:[EMAIL PROTECTED] Sent: Thursday, September 28, 2006 10:44 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN Fascinating discussion .. thanks for all the comments

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-27 Thread Julian Y. Koh
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 At 4:15 PM -0400 9/27/06, Shumon Huque wrote: A large number of users seem to be repeatedly authenticating, some of them as frequently as every 30 seconds or every few minutes. Some debugging revealed that these users are frequently oscillating their

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-27 Thread Michael Griego
On Sep 27, 2006, at 3:15 PM, Shumon Huque wrote: Is frequent reassociation the normal behavior in a dense deployment of APs? I can understand that it might be for highly mobile stations like wireless VoIP phones. But our environment is composed of mostly stationary wireless laptops in student

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-27 Thread Shumon Huque
On Wed, Sep 27, 2006 at 04:49:54PM -0500, Michael Griego wrote: On Sep 27, 2006, at 3:15 PM, Shumon Huque wrote: Is frequent reassociation the normal behavior in a dense deployment of APs? I can understand that it might be for highly mobile stations like wireless VoIP phones. But our

Re: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-27 Thread Shumon Huque
On Wed, Sep 27, 2006 at 03:41:23PM -0500, Julian Y. Koh wrote: This is exactly the problem that I referred to in my recent post of 9/18 (More fun with RADIUS). We are working on adjusting the power levels and channel assignments of the various APs in the problem areas to cut down the

RE: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN

2006-09-27 Thread Frank Bulk
@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Frequent reassociations/reauthentications in 802.1x WLAN We rolled out a WPA/802.1x authenticated WLAN to our student residences this semester. We're using EAP-TTLS with PAP as the inner authentication protocol. The EAP servers are a set of centralized