I'm going to turn on band steering again for a few days now that we allow n on the 2.4ghz band and see what happens with the stats, I imagine will see a shift of users towards the 5ghz band, yet the average SNR probably decreases.
Marcelo - From iphone email On Sep 17, 2010, at 3:46 PM, "Marcelo Lew" <m...@du.edu<mailto:m...@du.edu>> wrote: 5% 802.11a 5% unknown Marcelo Lew Wireless Enterprise Administrator University Technology Services University of Denver Desk: (303) 871-6523 Cell: (303) 669-4217 Fax: (303) 871-5900 Email: <mailto:m...@du.edu> m...@du.edu<mailto:m...@du.edu> From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of David R. Morton Sent: Friday, September 17, 2010 2:07 PM To: <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wireless and Apple Clients Marcelo, Perhaps I’m missing something, but before the change 60% were 2.4GHz 11g and 30% were N (5GHz). Where were the other 10%? David David Morton Director, Mobile Communications University of Washington <mailto:dmor...@u.washington.edu>dmor...@u.washington.edu<mailto:dmor...@u.washington.edu> tel 206.221.7814 ---------------------------------------------- <http://www.freshlymobile.com>www.freshlymobile.com<http://www.freshlymobile.com> a fresh look at mobility ---------------------------------------------- On Sep 17, 2010, at 11:45 AM, Marcelo Lew wrote: I changed our campus to allow 802.11n on 2.4GHz with no channel bonding, and disabled band steering. Interesting stats from Airwave: Out of about 7000 users: We had 60% on G and 30% on N (5GHz), our overall average SNR was 18-20. After the change described above, we now have 40% on G, 30% on N (5GHz) and 30% on N (2.4GHz). Average SNR went up to 28-29. Marcelo Lew Wireless Enterprise Administrator University Technology Services University of Denver Desk: (303) 871-6523 Cell: (303) 669-4217 Fax: (303) 871-5900 Email: <mailto:m...@du.edu> m...@du.edu<mailto:m...@du.edu> From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Hanset, Philippe C Sent: Thursday, September 16, 2010 6:48 AM To: <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wireless and Apple Clients Mark, Sounds Familiar... We have AP-125., n+1 architecture, running 5GHz in HT, 2.4 in HT but not channel bonding. We have enabled spectrum load balancing and disabled band steering. Seems to work fine. Philippe Hanset Univ. of TN On Sep 15, 2010, at 10:18 PM, Mark H. Wehrle wrote: Hi all, I want to check in to see if others are experiencing the same things that we’re seeing here at Penn regarding Apple clients’ connectivity and wireless issues on campus. I realize that some of you operate wireless with different vendor equipment, but we’re trying to debug this problem with our vendors (Aruba and Apple) so I’d like to hear what you are up against for a comparison or benchmark. Here’s what we’re facing: We run Aruba AP125’s with N+1 controller architecture. We have 802.11N enabled (since July) and running it at both 2.4Ghz and 5Ghz in some campus buildings. Wireless coverage was planned/designed for B/G (2.4) and 5Ghz is best effort but still pretty good in some areas. OS is 3.4.2.4 and we have band steering enabled. Problem is that in some areas (our Quadrangle complex which is a group of connected buildings in Resnet) and various Macs (mostly) running OS 10.6 (and other OS’s) will favor the 5Ghz radios even though a better signal on 2.4 is available. We’ve had a Windows machine right next to an Apple client in a troubled area and the Windows machine connects fine. Apple will not connect (or barley connect). Aruba is working with us on to debug this. First reports back from them are that band steering works best in highly dense 5Ghz-covered buildings (which we don’t have). The location that I’m referring to is over 100 years old so coverage is rough due to building materials and layout but thus far 2.4Ghz coverage has been OK for most devices (though we have some dead spots which get AP’s installed as needed). Aruba says to disable band steering in this one location as a temporary work around, which we did and the troubled Apple clients started to connect. We’re finding that most clients in the complex, roughly 70% are now preferring to connect at 2.4Ghz for N & G. Previously we were about 50/50 with clients connecting at 2.4 and 5Ghz. I’ve seen other postings about band steering and Apple clients but nothing that affects Windows clients. Is this accurate and what others have seen? Questions: Has anyone had problems with Apple clients with their Aruba setup and band steering? Are you continuing to use band steering or is it disabled, or is it running is some locations on campus but not others? If not what else are you doing about this issue? Those that are running Cisco or Meru (or other controller-based wireless vendors)– Are you seeing this similar issue? Is there a band steering equivalent parameter that you run? Reason I ask is to rule this out as an Aruba only issue. I would imagine there may be a similar thing going on. I’ve seen some emails previously on this listserv about band steering so I want to ask what you are doing about this since the semester has started and I want to determine how or if this impacts performance for both Windows and Apple clients with band steering enabled or disabled? Plus I want to hear from those that use other wireless systems to determine how these clients work with that setup. Any feedback is appreciated as we are working to debug this to the best resolution for our end user base and I’d like to know how other colleges and universities are handling this. Thanks in advance. --Mark Wehrle Phone: (215) 898-9664 Technical Director, ISC N&T Operations Fax: (215) 898-9348 University of Pennsylvania 3401 Walnut Suite 221a Email:weh...@isc.upenn.edu<x-msg://868/weh...@isc.upenn.edu> Phila. 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