I made a graph of % of clients that can/can't use what 5 Ghz channel. [image: Inline image 1]
*--Jeremy L. Gibbs* Sr. Network Engineer Utica College IITS T: (315) 223-2383 F: (315) 792-3814 E: jlgi...@utica.edu http://www.utica.edu On Tue, May 30, 2017 at 11:23 AM, Edward Ip <i...@algonquincollege.com> wrote: > Oops my bad…we disable channel 120, 124, and 128 for the weather station > not 144. > > > > *Edward Ip* > > *Algonquin College* | 1385 Woodroffe Avenue | Room C316 | Ottawa | Ontario > | K2G 1V8 | Canada > > algonquincollege.com > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Edward Ip > *Sent:* Tuesday, May 30, 2017 11:18 AM > > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* Re: [WIRELESS-LAN] Dynamic vs Static Channel Plans > > > > I don’t know about your region, but we are located in Ottawa, Canada and > we have turned off Channel 144 due to a weather radar station located near > our city. Could be a possible source. > > > > Regards, > > *Edward Ip* > > *Algonquin College* | 1385 Woodroffe Avenue | Room C316 | Ottawa | Ontario > | K2G 1V8 | Canada > > algonquincollege.com > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [ > mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] *On Behalf Of *Smith, Todd > *Sent:* Tuesday, May 30, 2017 11:09 AM > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* Re: [WIRELESS-LAN] Dynamic vs Static Channel Plans > > > > Hello Jon, > > > > Thanks for the input! Aruba’s ARM is frequently been cited as the poster > child for dynamic channel plans. I am not using Aruba here but it is > probably my next upgrade choice unless something better comes long. > > > > Does ARM detect if an AP goes down and adjust TX power and/or channel > accordingly? > > > > Were you ever able to identify your DFS source on channel 144? Our core > facilities are near a regional airport that also serves the Air National > Guard and I don’t see DFS timeouts. I have read that sometimes false > positives can be generated in DFS channels and channel switches in response. > > > > Todd > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [ > mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] *On Behalf Of *Jonathan Miller > > > > Todd, > > > > We are an Aruba shop using dynamic channel plans. > > > > We let Aruba's ARM (Adaptive Radio Management) decide on the best channel > for each radio, and in some cases, give it the ability to turn off a 2.4 > radio if it detects that there's too much co-channel interference in an > area. ARM will not switch channels if there is a client associated to a > radio, except in the case of an emergency (DFS beacon, etc). We also let > it pick the Tx power within a range that we specify (typically 12 - 15 EIRP > on 5GHz, lower on the 2.4). > > > > ARM has some secret sauce about how it decides which channel is best, and > has some parameters that we can tune, but we haven't really fiddled with > the knobs too much. > > > > We are using DFS channels, but we haven't had complaints about clients > that can't see them. I suspect that part of the reason that we haven't had > complaints about dead spots is that we have a pretty dense deployment, so > in our res halls, a client should be able to see at 3-4 APs, and the odds > of all of them running on a channel that a given client does not support > seems to be slim enough. Also, it may be that we just got lucky and don't > have too many older 5GHz radios around that don't support all DFS > channels. We have disabled channel 144 because we did see some beacon > events on it, but all other 5GHz channels are enabled. > > > ------------------------------ > > CONFIDENTIALITY NOTICE: The information contained in this message may be > privileged and confidential. If this e-mail contains protected health > information, you are hereby notified that any dissemination, distribution > or copying of this communication is strictly prohibited, except as > permitted by law. If you have received this communication in error, please > notify the sender immediately by replying to this message and deleting it > from your computer. Thank you > > ********** 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.
