Thanks, Kees. In fairness to Cisco, I can follow individual clients on data rates as well. Id love to see some sort of data rate trending capability, but then again it's easy to ask for something but harder to write the code, I realize.
________________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [[email protected]] On Behalf Of Kees Pronk [[email protected]] Sent: Friday, September 30, 2011 10:25 AM To: [email protected] Subject: [WIRELESS-LAN] Disappointing numbers of 5ghz clients client devices STA's are *really* not intelligent so even when a better AP is nearby they stay connected to further away AP's on lower datarates. So even if you have dense deployment of your AP's you may end up with bad datarates.... We do not have control over the devices of our students, we can only give advices (dual radio, uptodate drivers etc.etc.) I know it made a difference because I checked myself the latency and throughput in our busiest study halls before and after *and* I followed the students comments on twitter about our wireless lan. The tone of the tweets became much more positve after the change / they did not send #fail tweets anymore ;-) Also the Juniper / Trapeze cli on the controllers enables me to follow a specific STA realtime so i noticed a much better quality of sessions (high data rates) compared to before the change was made. Kees. >>> Peter P Morrissey 30-09-11 13:45 >>> How do you measure the before and after performance boost? It seems like if you have good coverage already, there is less of a likelihood of connecting at a low data rate anyway, right? How do you know you really made a difference? Peter M. -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Kees Pronk Sent: Friday, September 30, 2011 4:33 AM To: [email protected] Subject: [WIRELESS-LAN] Betr.: Re: [WIRELESS-LAN] Betr.: Re: [WIRELESS-LAN] Disappointing numbers of 5ghz clients Airmagnet software gives you an excellent insight in the amout of clients connecting at which datarates. Also Juniper/Trapeze (which we use) Ringmaster has nice reports on this. Too many STA's connecting on low datarates, that is why we got rid of 1,2,55, and 11 on 802.11gn, and also the low datarates on 802.11an. If you have high density wifi AP deployments this is an absolute performance booster. Be careful when using VOWLAN though. regards, Kees. >>> Lee H Badman 29-09-11 19:25 >>> Now I'm getting curious. We have had 1 and 2 Mbps disabled for years and are contemplating also pulling the plug on 5.5 and maybe 11. We have Cisco WCS, and I'm struggling to find a meaningful way to quantify whether the lower rates are being used and to what extent, without hopping through hundreds of clients individually to see what they are at. Has anyone found any sort of data rate trending/reporting mechanism to use as you turn off legacy rates? Regards- Lee Badman Lee H. Badman Wireless/Network Engineer Information Technology and Services Adjunct Instructor, iSchool Syracuse University 315 443-3003 -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Osborne, Bruce W Sent: Thursday, September 29, 2011 7:47 AM To: [email protected] Subject: Re: [WIRELESS-LAN] Betr.: Re: [WIRELESS-LAN] Disappointing numbers of 5ghz clients You can't turn off 11b if you need to support wireless game consoles. On our Aruba system, we turned off 1 & 2 Mbit transmit rates, but we needed to list 2 as a basic rate, primarily for Nintendo gaming systems. We have 5.5 Mbit turned on for Transmit & Basic rates. This allows some performance improvement, while still permitting some 11b & gaming consoles designed for consumer networks. Bruce Osborne Wireless Network Engineer IT Network Services (434) 592-4229 LIBERTY UNIVERSITY 40 Years of Training Champions for Christ: 1971-2011 -----Original Message----- From: Voll, Toivo [mailto:[email protected]] Sent: Wednesday, September 28, 2011 2:09 PM Subject: Re: Betr.: Re: [WIRELESS-LAN] Disappointing numbers of 5ghz clients You're correct, getting rid of not only 802.11b but also the lower data rates of g/a is absolutely a must for any area that has high client density or bandwidth requirements. However, in some select locations and applications there's too much organizational inertia / money tpreviously provided, so here and there we'll still support it. (Also, see previous Ticketmaster thread...) -Toivo -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Kees Pronk Sent: Wednesday, September 28, 2011 12:23 To: [email protected] Subject: [WIRELESS-LAN] Betr.: Re: [WIRELESS-LAN] Disappointing numbers of 5ghz clients Toivo, You might want to consider to shut off 802.11b, it takes away valuable 'airtime' from the rest of your clients by slowing down potentially all of your AP's with management and beacon frames only for 13 clients...... We did it via our captive portal, informing our clients about this. Most devices were from our organisation so the users were happy to get better gear..... best regards, Kees. >>> "Voll, Toivo" 9/28/2011 5:36 PM >>> And here’s ours. We’re mostly dual-band, but not all N, and Band Select is enabled. Note the number of 802.11b clients. [cid:[email protected]] Toivo Voll Network Administrator Information Technology Communications University of South Florida --------------------------------------------------------------------------- Op deze e-mail zijn de volgende voorwaarden van toepassing: The following conditions apply to this e-mail: http://emaildisclaimer.avans.nl -- --------------------------------------------------------------Group discussion list can be found at http://www.educause.edu/groups/. ----- No virus found in this message. 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