Jeff- what are you using to report on channel widths being used by clients, both point-in-time and longer periods?
-Lee Lee Badman | Network Architect Certified Wireless Network Expert (#200) 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 Jeffrey D. Sessler Sent: Thursday, July 27, 2017 8:24 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Cisco FRA APs If you’re not using best you are leaving bandwidth in the air (so to speak). The code will auto determine best width based on the clients it sees in the surrounding areas (the white paper covers this), so if they are all AC (and depending on other factors), the WAPs will run at 80. Not AC or a mix, there is a decision algorithm used to decide width all the way down to 20. My new residential hall is about 120 beds and 110 WAPs – very dense. Nearly all of them are 80-wide when running in best. The propagation of 5GHz is poor, so it doesn’t take a lot of distance to allow reuse of channels. Jeff From: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Jake Snyder <jsnyde...@gmail.com<mailto:jsnyde...@gmail.com>> Reply-To: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Thursday, July 27, 2017 at 2:26 PM To: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: Re: [WIRELESS-LAN] Cisco FRA APs I’m not a DCA BEST guy. You should be using the channel width that the building can support. With FRA, it’s easy to quickly overshoot the amount of channels available. That said, if you want to take the advice to use BEST, you should set the max width to 40MHz. Also, On Jul 21, 2017, at 11:28 AM, Jeffrey D. Sessler <j...@scrippscollege.edu<mailto:j...@scrippscollege.edu>> wrote: Less, there is a Cisco white paper on the subject (applies to 8.2 and above). It has a lot of fantastic information on RRM in general including FRA, including how it makes decisions. It should all be there, and what’s not I got directly from the RRM/FRA engineers in the BU. http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_RRM_White_Paper.html Jeff From: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of "lhbad...@syr.edu<mailto:lhbad...@syr.edu>" <lhbad...@syr.edu<mailto:lhbad...@syr.edu>> Reply-To: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Friday, July 21, 2017 at 8:23 AM To: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: Re: [WIRELESS-LAN] Cisco FRA APs Jeff- Any reference links on the timers/sensitivity/channel width recommendations? -Lee Lee Badman | Network Architect Certified Wireless Network Expert (#200) 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<http://its.syr.edu> SYRACUSE UNIVERSITY syr.edu<http://syr.edu> From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jeffrey D. Sessler Sent: Thursday, July 20, 2017 4:30 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Cisco FRA APs In general, here are the important items. * Make sure your 802.11a/n/ac and b/g/n DCA timers are at the default 10 mins. This is critical since FRA uses the data from DCA runs to decide changes for the radio. If this runs only once every six hours, FRA will not be able to make an informed (correct) decision about the radio role. * 802.11a/n/ac and b/g/n must have the same RF group leaders, and those leaders must be controllers running the latest code. * 802.11a/n/ac DCA Channel Width should be set to “Best” – it’s helps maximize spectrum use. Even in our dense deployments, most WAPs run in 80 MHz. * FRA – sent sensitivity to LOW, this sets the bar very high for determining a role switch for the radio. * FRA – Interval of 1 Hour. This allows the fastest reaction to need. Last but not least, proper deployment is key. If WAPs are in hallways, FRA is not going to work well at all since you’ll wind up with coverage holes for clients in rooms. If you are deploying in-room, FRA works wonderfully. In my residential hall with 3800’s, very few WAPs pick 2.4 and many run dual 5Ghz. The residential hall is 10-30x the bandwidth use of another similar res hall with 3700-series. It’s wireless only and I’ve had no complaints from the residents. Jeff From: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of "bruce_entwis...@redlands.edu<mailto:bruce_entwis...@redlands.edu>" <bruce_entwis...@redlands.edu<mailto:bruce_entwis...@redlands.edu>> Reply-To: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Thursday, July 20, 2017 at 11:47 AM To: "wireless-lan@listserv.educause.edu<mailto:wireless-lan@listserv.educause.edu>" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: Re: [WIRELESS-LAN] Cisco FRA APs We are currently running version 8.2.151.0 which looks to be the most recent 8.2 release. Thanks Bruce From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Luke Jenkins Sent: Wednesday, July 19, 2017 4:57 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Cisco FRA APs What code version are you using? I'd recommend the latest 8.2 maintenance release for anyone using FRA. -Luke On Tue, Jul 18, 2017 at 11:38 AM, Entwistle, Bruce <bruce_entwis...@redlands.edu<mailto:bruce_entwis...@redlands.edu>> wrote: This summer we remodels a residence hall and installed our first Cisco FRA APs, model 2802i. The Radio Role Assignment on the APs is currently set to auto, and a few of the APs have changed to run both radios at 5GHz. I was looking to see what others have observed and have found successful with this type of installation. Thank you Bruce Entwistle Network Manager University of Redlands ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found athttp://www.educause.edu/discuss. -- =-=-=-=-=-=-=-=-=-=-=-= Luke Jenkins Senior Network Engineer Weber State University ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found athttp://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found athttp://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found athttp://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found athttp://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
