Hi Donald, I’m not quite following the questions. Where we are very dense and likely to risk channel overlap with 40, we use 20. Examples- our stadium, dense residential environments, very RF porous buildings that are also dense. In 5 GHz, we *generally* let RRM pick channel, but often overrule it on power. Most max power differences allowed across the individual 5 GHz channels don’t come into play in our *generally* low-power cells. And we are not yet using DFS channels whole-hog, but do have pilot spaces in use.
Our way certainly isn’t the only way, but has proven reliable for us over time. -Lee Lee Badman | CWNE #200 | Network Architect Information Technology Services 206 Machinery Hall 120 Smith Drive Syracuse, New York 13244 t 315.443.3003 f 315.443.4325 e lhbad...@syr.edu<mailto:lhbad...@syr.edu> w its.syr.edu SYRACUSE UNIVERSITY syr.edu From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Donald Ambrose Sent: Wednesday, November 30, 2016 7:24 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 5GHz Channel Width Any advice on manually setting up the 5 Ghz channels? Also I would like to use the DFS channels so that I can get a wider range to choose from. But I have noticed that the wattage correspond to the channel I choose in this band .So would it be advisable to use two 165s close enough or should I design the channel selection keeping the distance into consideration as well. Thanks Donald Ambrose From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Tuesday, November 29, 2016 7:58 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] 5GHz Channel Width 20 in our dense spaces, 40 where it can be done safely- about 50/50. Lee Badman (mobile) On Nov 29, 2016, at 6:09 PM, Jason Cook <jason.c...@adelaide.edu.au<mailto:jason.c...@adelaide.edu.au>> wrote: It all comes down to requirements & design, if you can have 0 channel overlap while using 40Mhz then go for it… This is likely to be quite a challenge in multi-floor environments. Using tools like Ekahau Site Survey and Airmagnet survey will help design and verify these installs. We went from 20 to 40 a few years back, but move back to 20 by default early last year. We have a few 40Mhz locations where we can, we could probably do a lot more but unless we have time to design and test we leave things at 20. Here’s come CWNE’s talking about it https://vimeo.com/158370545 Starts 27:50 Though the rest of the video is pretty interesting too -- Jason Cook Technology Services The University of Adelaide, AUSTRALIA 5005 Ph : +61 8 8313 4800 From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Trinklein, Jason R Sent: Wednesday, 30 November 2016 8:05 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] 5GHz Channel Width Hi All, I was just reading a blog article that heavily recommends not to use 40Mhz channel width in multi-floor environments, particularly where many 5GHz radios are used (particularly in our case with Xirrus multi-radio APs). Our campus presently uses 20MHz channel width in all buildings. We are testing and considering 40MHz width because of the bandwidth benefits for clients. What do you use on your campus? Have you found that setting a 40MHz channel width on your 5GHz radios has caused too much interference? Here is the article: http://divdyn.com/dual-5ghz-radio-aps/ Your thoughts are appreciated. -- Jason Trinklein Wireless Engineering Manager College of Charleston 81 St. Philip Street | Office 311D | Charleston, SC 29403 trinkle...@cofc.edu<mailto:trinkle...@cofc.edu> | (843) 300–8009 ********** 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/. This communication together with any attachments is for the exclusive and confidential use of the addressee(s). Any other distribution, use or reproduction without the sender’s prior consent is unauthorized and strictly prohibited. If you have received this message in error, please notify the sender immediately and delete or shred the message without making any copies. ********** 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/.
