Quite interesting. Thank you. While listening to the explanation of attenuation related to the proximity of the two radios within a same AP I thought “Bad for sensors, but isn’t it what we actually want in high density deployment like an auditorium?”. So, maybe running two radios withing one AP at 5 GHz in an auditorium would reduce the signal and accomplish the small cells pattern that we want. Just thinking out loud here! Has someone tried this?
Philippe Philippe Hanset www.anyroam.net www.eduroam.us GPG key id: 0xF2636F9C > On Jun 30, 2016, at 8:23 AM, Kees Pronk <cl.pr...@avans.nl> wrote: > > All, > > Little kick at the discussion from a while ago: > There is a YouTube video now from 7signal in which dual 5GHz radio setup is > discussed: https://youtu.be/6eueR3PYXlA <https://youtu.be/6eueR3PYXlA> (from > 11:30 in the video). Pretty interesting! > > BR, Kees > > Van: Kees Pronk > Verzonden: donderdag 7 april 2016 13:45 > Aan: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@listserv.educause.edu> > Onderwerp: RE: [WIRELESS-LAN] Turning off 2.4 on a select SSID? > > Hi Chris, > > “you could in theory double the airtime available” > > I would be interested in your actual experience with this. Now that a few > vendors have taken this approach and others stay away from this. > > Arguments in favor of 5/5 you will find these abundant on the vendors > marketing pages, but how about : > Extra COGS (band pass filters etc), extra complexity with your channels plans > (need a lot of separation between the 5/5 radios), you must enable DFS > channels on every AP but what about false positive radar detects? What about > the 2 radio’s ‘deafening’ each other while trying so send/receive at the > same time. > > Please keep us posted and maybe others testing with this > 1. Innovation > 2. Marketing gimmick > (pick one ;-) > > Best regards, Kees > > Van: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] Namens Larry Dougher > Verzonden: donderdag 7 april 2016 03:11 > Aan: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> > Onderwerp: Re: [WIRELESS-LAN] Turning off 2.4 on a select SSID? > > Thanks Chris! > > Larry Dougher > Chief Information Officer > Information Technology Services <http://its.wsesu.net/> > Windsor Southeast Supervisory Union <http://wsesu.net/> > 127 State Street, Windsor, VT 05089 > Email <mailto:ldoug...@wsesu.net> | Google+ <http://goo.gl/gEAdt> | Twitter > <http://twitter.com/larrydougher> | LinkedIn > <http://www.linkedin.com/in/larrydougher> | 802.674.8336 > > > On Wed, Apr 6, 2016 at 2:45 PM, Chris Adams (IT) <chris.ad...@ung.edu > <mailto:chris.ad...@ung.edu>> wrote: > Larry, > > We have deployed 802.11ac WAPs in many locations, but only have 80mhz > channels enabled sparingly around campus. My hope is that by having the SDR > option, we could configure 2x 5ghz radios with either 20Mhz or 40Mhz > channels, logically operating as 2 WAPs. Our wireless use case is primarily > for internet access – we just don’t have a need for true wave1/2 802.11ac > throughputs at this time. > > To see true Wave2 throughputs, I believe the client WNIC would need to be > upgraded. If we could operate 2 “logical” 5ghz WAPs from a single unit for a > small increase in price, I think this is where our greatest benefit would be > at this time as you could in theory double the airtime available. > > This is based on several assumptions I am making – I have not gotten my hands > on the new AP250 yet but I am actively looking to do so. > > http://boundless.aerohive.com/blog/Designing-WLANS-What-If-we-could-double-our-airtime-at-5-GHz.html > > <http://boundless.aerohive.com/blog/Designing-WLANS-What-If-we-could-double-our-airtime-at-5-GHz.html> > > > Thanks, > > Chris Adams > > Director, Network & Telecom Services > Division of Information Technology > University of North Georgia > > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] On Behalf Of Larry Dougher > Sent: Wednesday, April 6, 2016 2:28 PM > > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> > Subject: Re: [WIRELESS-LAN] Turning off 2.4 on a select SSID? > > Chris, > > I have a question about the AP250, but may be a question about MU-MIMO more > generally. So, all things being equal, would a 5Ghz 802.11ac device/client > see any benefit from a Wave 2 AP or would that device/client have to have an > upgraded/new 802.11ac 5Ghz Wave 2 chip to see a benefit? > > Thanks, > > Larry Dougher > Chief Information Officer > Information Technology Services <http://its.wsesu.net/> > Windsor Southeast Supervisory Union <http://wsesu.net/> > 127 State Street, Windsor, VT 05089 > Email <mailto:ldoug...@wsesu.net> | Google+ <http://goo.gl/gEAdt> | Twitter > <http://twitter.com/larrydougher> | LinkedIn > <http://www.linkedin.com/in/larrydougher> | 802.674.8336 <tel:802.674.8336> > > On Wed, Apr 6, 2016 at 1:30 PM, Chris Adams (IT) <chris.ad...@ung.edu > <mailto:chris.ad...@ung.edu>> wrote: > I echo Jeremy’s sentiment – our experience with band-steering has been > overwhelmingly positive. We are also not (currently) using DFS channels – but > may be revisiting this soon. I’d estimate almost 2/3 of our 2.4ghz radios are > disabled. > > I am very happy to see the new Aerohive AP250 has a SDR with the option of > disabling the 2.4ghz radio in favor of having 2x 5ghz radios. > > Thanks, > > Chris Adams > > Director, Network & Telecom Services > Division of Information Technology > University of North Georgia > > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] On Behalf Of Jeremy Gibbs > Sent: Wednesday, April 6, 2016 1:27 PM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> > Subject: Re: [WIRELESS-LAN] Turning off 2.4 on a select SSID? > > I find the opposite to be true with band steering. If we turn it off, the > majority of our clients won't connect to 5 Ghz, even if they are right above > an AP. This causes lots of disconnect problems and congestion in the 2.4 Ghz > spectrum. Turning band steering on fixes the problem for us. > > > -- > > Jeremy L. Gibbs > Sr. Network Engineer > Utica College IITS > > On Wed, Apr 6, 2016 at 1:18 PM, Turner, Ryan H <rhtur...@email.unc.edu > <mailto:rhtur...@email.unc.edu>> wrote: > All, > > This is probably a fool’s errand, but we are debating experimenting with > turning off the 2.4 spectrum on our eduroam SSID on parts of campus that have > a dense 5 gig coverage. We’ve always positioned eduroam as the premium SSID, > and left a WPA2-PSK SSID for all the rest that don’t support advanced EAP > methods. We are debating trying this in just the IT building to start (see > how many people scream). Has anyone done anything like this? The goals > would be to continually remove traffic from the garbage bands, hopefully > increasing client performance. Band steering isn’t very good. > > Thanks, > Ryan Turner > The University of North Carolina at Chapel Hill > r...@unc.edu <mailto:r...@unc.edu> > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/groups/ <http://www.educause.edu/groups/>. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found > athttp://www.educause.edu/groups/ <http://www.educause.edu/groups/>. > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found > athttp://www.educause.edu/groups/ <http://www.educause.edu/groups/>. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found > athttp://www.educause.edu/groups/ <http://www.educause.edu/groups/>. > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found > athttp://www.educause.edu/groups/ <http://www.educause.edu/groups/>. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found > athttp://www.educause.edu/groups/ <http://www.educause.edu/groups/>. > Disclaimer ( http://www.avans.nl/over-avans/e-mail-disclaimer > <http://www.avans.nl/over-avans/e-mail-disclaimer> ) ********** Participation > and subscription information for this EDUCAUSE Constituent Group discussion > list can be found at http://www.educause.edu/groups/ > <http://www.educause.edu/groups/>. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
