Associations: - 51% @ 5GHz (32% .11n, 17% .11ac, 2% .11a) - 49% @ 2.4GHz (36% .11n, 13% .11g)
Usage (Data Transferred): - 66% @ 5GHz (34% .11n, 32% .11ac) - 34% @ 2.4GHz (32% .11n, 2% .11g)As for turning off 2.4GHz, we've done so in certain areas where we have higher-density coverage (eg. larger classrooms that may have a dozen WAPs in them). In general, we leave both radios on. To help with the 2.4GHz situation, though, we have disabled all data rates below 12Mbps to improve efficiency for remaining 802.11g/n users.
We've also considered doing separate SSID's for 2.4GHz and 5GHz but ultimately decided against it due to end-user support issues. Our 5GHz and 2.4GHz coverage footprints aren't identical, and one observation we had was that some devices would tend to prefer staying on or reconnecting to the same SSID. So, once a device got on 2.4GHz, it may require the user to manually move back to 5GHz (vs. just having both frequencies available and hoping the device will automatically select 5GHz).
Jason On 04/07/2016 08:24 AM, Hector J Rios 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:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Perry Correll*Sent:* Thursday, April 07, 2016 7:49 AM *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU *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 eitherBest Regards, Perry *Perry Correll* | /Xirrus Principal Technologist/ o: 805 376 5437 | m: 321 505 7726*From:*The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Chris Adams (IT)*Sent:* Thursday, April 07, 2016 8:31 AM*To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>*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 JThanks, ** Chris Adams, CISSP 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] *On Behalf Of *Kees Pronk*Sent:* Thursday, April 7, 2016 7:45 AM*To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>*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: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 05089Email <mailto:ldoug...@wsesu.net> | Google+ <http://goo.gl/gEAdt> | Twitter <http://twitter.com/larrydougher> | LinkedIn <http://www.linkedin.com/in/larrydougher> | 802.674.8336On 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 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 ofdisconnect 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/. ********** 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 <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/.
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