At our Uni we raised the the interval to 300ms without any noteworthy problems and the redux in airtime utilization was impressive. Due to massive false + radar detects we are using a 4 - 20MHz channel plan for 5GHz ☹ which forces us to use the spectrum available as efficient as possible. One interesting setup would be to lower the beacon interval for 2.4GHz and achieve bandsteering with this: send more clients to 5GHz. I am considering a setup like this for the second half of this year.
Kees Van: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] Namens Jeffrey D. Sessler Verzonden: dinsdag 31 mei 2016 17:12 Aan: [email protected] Onderwerp: Re: [WIRELESS-LAN] Beacon Intervals Craig, There are always ways to mitigate the cell issue e.g. depending on the vendor AP, adding a small cell offload module. For the shopping mall, installing an underlayment on lowest floor with a foil backing – typically for thermal use, but really effective on blocking WiFi. Given the hostile environment, I don’t see a lot of tuning options here for combating the problem in 2.4. Jeff From: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> on behalf of Craig Simons <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Monday, May 30, 2016 at 10:16 AM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [WIRELESS-LAN] Beacon Intervals Yes, that’s a large part of the problem… The other is being on top of a shopping mall… I briefly went down the rf coating investigation, but this would also block cell signals as well… which would be a deal killer. - Craig On May 27, 2016, at 1:36 PM, Jeffrey D. Sessler <[email protected]<mailto:[email protected]>> wrote: Craig, Does your downtown campus have a lot of externally-facing windows? If so, consider having a low-e-coating film added to all of them. Yes, there is an expense involved, but it’s an effective way to reduce/cutoff/eliminate the urban WiFi influencers. Jeff From: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> on behalf of Craig Simons <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Friday, May 27, 2016 at 12:44 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [WIRELESS-LAN] Beacon Intervals Jason, Thanks for the reply. Actually the link you mention is what got me going on this in the first place. Our downtown campus is situated in a very busy urban environment - hotels, coffee shops, apartments, you name it. Several places in the building can see 25+ SSIDs, of which only 3 are ours. I’ve done as much tuning as I can to limit co-channel interference on 2.4, the minimum data rate is 12 (I could boost to 24 I suppose), so I’m just looking for more tricks to try. - Craig On May 26, 2016, at 6:38 PM, Jason Cook <[email protected]<mailto:[email protected]>> wrote: My understanding is you really don’t want to be playing with this, perhaps if all other avenues have been exhausted it can be investigated…. Reduce your SSID’s, disable lower data rates, reduce co-channel AP’s (your own and neighbours) If you haven’t seen it play with this tool (Changing the beacon Rate shows the variations) http://www.revolutionwifi.net/revolutionwifi/p/ssid-overhead-calculator.html -- Jason Cook Technology Services The University of Adelaide, AUSTRALIA 5005 Ph : +61 8 8313 4800 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Britton Anderson Sent: Friday, 27 May 2016 10:10 AM To: [email protected]<mailto:[email protected]> Subject: Re: [WIRELESS-LAN] Beacon Intervals Hey Craig, It really depends on how dense your environment is. Keep in mind, the longer your beacon interval, the slower the roaming time clients take between APs. In my mind, the overhead that beacons introduce is far less of an issue than mobile clients dropping connections when they're roaming through the network. Especially considering the vast majority of cell carriers using WiFi calling now. --Britton Britton Anderson<mailto:[email protected]> | Senior Network Communications Specialist | University of Alaska<http://www.alaska.edu/oit> | 907.450.8250 On Thu, May 26, 2016 at 4:16 PM, Craig Simons <[email protected]<mailto:[email protected]>> wrote: Hello Group, On most vendor products that I’ve seen, the beacon intervals for SSIDs by default are set to ~100ms. Has anyone gone to the lengths of increasing this default in an effort to combat overhead? - Craig SFU SIMON FRASER UNIVERSITY Network Services Craig Simons Network Operations Manager Phone: 778-782-8036<tel:778-782-8036> Cell: 604-649-7977<tel:604-649-7977> Email: [email protected]<mailto:[email protected]> Twitter: simonscraig<http://www.twitter.com/simonscraig> ********** 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/. ********** 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/.
