And the other question Hector is how many of those 2.4 clients ARE capable of 5ghz but choose 2.4 instead, right?
*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 <[email protected]> | Google+ <http://goo.gl/gEAdt> | Twitter <http://twitter.com/larrydougher> | LinkedIn <http://www.linkedin.com/in/larrydougher> | 802.674.8336 On Thu, Apr 7, 2016 at 9:24 AM, Hector J Rios <[email protected]> wrote: > I guess this brings up another good question, and that is, what is the > percentage of 5GHz vs 2.4GHz you all see in your institutions? For us is > still 50-50. And it’s been like that for a while. I still see new laptops > that only come with 2.4GHz adapters. > > > > I would love to start turning off 2.4GHz in some areas of our campus, but > I don’t think that’s an option for us at the moment. > > > > > > Hector Rios > > Louisiana State University > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > [email protected]] *On Behalf Of *Perry Correll > *Sent:* Thursday, April 07, 2016 7:49 AM > > *To:* [email protected] > *Subject:* Re: [WIRELESS-LAN] Turning off 2.4 on a select SSID? > > > > Chris, > > > > Not ‘chuckling’, just smiling as we are actually glad to see other vendors > supporting this capability. Today we are seeing 70, 80, 90, even up to 95% > clients supporting 5Ghz capabilities and the advancement of SDR > capabilities enables IT administrators to more efficiently and effectively > address this evolution. However Wi-Fi in the 2.4Ghz spectrum isn’t going > away anytime soon either > > > > Best Regards, > > Perry > > > > *Perry Correll* | *Xirrus Principal Technologist* > > o: 805 376 5437 | m: 321 505 7726 > > > > > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [ > mailto:[email protected] > <[email protected]>] *On Behalf Of *Chris Adams (IT) > *Sent:* Thursday, April 07, 2016 8:31 AM > *To:* [email protected] > *Subject:* Re: [WIRELESS-LAN] Turning off 2.4 on a select SSID? > > > > Kees, > > > > I think your skepticism is well founded. We have many locations with > multiple 5ghz radios in the same room, but multiple 5ghz on the same device > will be a more “uncharted” territory for our deployment. I am in the > process of getting a few AP250 to throw into a few of our smaller > auditoriums, which should be a good test of their performance. > > > > I do believe that the channel width may be a differentiator in how well > the deployment works – we are using 20mhz in most locations, which > eliminates many of the spectrum and channel availability issues found with > 40mhz+ channel widths. > > > > PS: I’m sure some of the Xirrus guys are chuckling at this conversation as > Xirrus has been well known for having large SDR arrays for many years now > J > > > > Thanks, > > > > Chris Adams, CISSP > > > > Director, Network & Telecom Services > > Division of Information Technology > > University of North Georgia > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [ > mailto:[email protected] > <[email protected]>] *On Behalf Of *Kees Pronk > *Sent:* Thursday, April 7, 2016 7:45 AM > *To:* [email protected] > *Subject:* 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:[email protected] > <[email protected]>] *Namens *Larry Dougher > *Verzonden:* donderdag 7 april 2016 03:11 > *Aan:* [email protected] > *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 <[email protected]> | 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) <[email protected]> > 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 > > > > > > Thanks, > > > > Chris Adams > > > > Director, Network & Telecom Services > > Division of Information Technology > > University of North Georgia > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > [email protected]] *On Behalf Of *Larry Dougher > *Sent:* Wednesday, April 6, 2016 2:28 PM > > > *To:* [email protected] > *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 <[email protected]> | 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 1:30 PM, Chris Adams (IT) <[email protected]> > 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: > [email protected]] *On Behalf Of *Jeremy Gibbs > *Sent:* Wednesday, April 6, 2016 1:27 PM > *To:* [email protected] > *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 <[email protected]> > 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 > > [email protected] > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > 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/. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > 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/. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > 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/. > > 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/. > > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > 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/. > ********** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > 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/.
