OK, here is the deal: On AC gear you need to put the last frequency in your list as a non-dfs channel. If it has detection>detection>detection it will indeed jump to a channel outside of your freq list. You need to set a non-dfs channel as the last one to ensure that it doesn't jump to the worst possible freq.
Also, many of the firmware versions have issues with tons of false detections. We have had the best luck with 7.2.2 or 7.2.4 on DFS channels. I have yet to find an 8.0 beta that works good on DFS, but 8.0b12 has been better than most. We try to put most of our AC gear on non-dfs. However, we have ptp links on 7.2.2 DFS that have been running for well over a year without a detection. Sent from my Verizon 4G LTE Droid On Oct 20, 2016 1:11 PM, alex phillips <[email protected]> wrote: > > To say its a Sham, may be a little harsh. > > OS8 does a better job at the issue however essentially if a PrismAC radio > sees activity on the DFS channel you are on that is not part of its session > list, it runs away and goes to another channel. > > I think its physically impossible for these class of radio systems to > actually detect the difference between Radar and just Signal on that band. > > I have had these discussions with UBNT, as well as others who use other radio > products and I think false detect is a common problem on all platforms, not > just UBNT. > > The FAA really threw a fit about this issue and the FCC made this a very > strict certification requirement and so this is all that can be done. Even > AF5 has this issue. > > We are going to start running a script that checks the radio ever 10 mins and > if the freq has changed its going to change it back. I guess if there is a > war going on between dfs logic and our logic, this may not work. > > I also wonder if the channel list can be limited. I don't see it in the UI. > Perhaps UBNT folks listening can lend a hand here. > > > > Alex Phillips > CEO and General Manager > RBNS.net > HighSpeedLink.net > WISPA.org Board of Directors (2011-2017) > WISPA President (2015-2017) > 540-908-3993 > > On Thu, Oct 20, 2016 at 2:37 PM, James Craig via Ubnt_users > <[email protected]> wrote: >> >> Hi Guys, >> >> airMAX radios should only jump to another channel if a RADAR hit is >> detected. I would suggest running a Frequency list when operating in DFS >> bands. >> >> That being said, this is most like related to a bug fixed in airOS8beta16. >> >> >> Ethan / Matthew: Could you forward the Support Info file from an AP that >> has recently seen this? >> >> [email protected] >> >> >> >> >> >> On Thu, Oct 20, 2016 at 1:38 PM, Ethan E. Dee <[email protected]> wrote: >>> >>> On the rockets, you choose a DFS channely and it sticks, that is what I'm >>> used to. >>> Can't replicate that on the rocket ac's >>> >>> >>> On 10/20/2016 1:35 PM, Jordan de Geus wrote: >>>> >>>> Isn't DFS supposed to channel hop? >>>> >>>> Have you tried blocking the higher noise frequencies to prevent the use of >>>> those specific channels? >>>> >>>> On Thu, Oct 20, 2016 at 10:33 AM, Matthew Brendle >>>> <[email protected]> wrote: >>>>> >>>>> I have a 5AC PRISM doing the same thing. I manually pick a DFS channel on >>>>> the wireless tab and the radio will go to a non-DFS channel. Does not >>>>> matter which DFS channel I pick, it will go to a non-DFS channel to >>>>> operate. >>>>> It will let me manually pick a non-DFS channel and it will stay on it. >>>>> Not >>>>> auto, no freq list... >>>>> >>>>> Matt B. >>>>> >>>>> -----Original Message----- >>>>> From: [email protected] [mailto:[email protected]] >>>>> On >>>>> Behalf Of Ethan E. Dee >>>>> Sent: Thursday, October 20, 2016 1:31 PM >>>>> To: Ubiquiti Users Group <[email protected]> >>>>> Subject: Re: [Ubnt_users] DFS on AC >>>>> >>>>> No, not confusing them. >>>>> Complaining about both. >>>>> DFS channel selection has a mind of it's own. With or without a frequency >>>>> list. >>>>> And auto, does not pick the best channel, or anywhere close. >>>>> >>>>> On 10/20/2016 1:27 PM, Matt Hoppes wrote: >>>>> > It sounds like you're confusing DFS and auto channel selection. Which is >>>>> your question about? >>>>> > >>>>> >> On Oct 20, 2016, at 13:13, Ethan E. Dee <[email protected]> wrote: >>>>> >> >>>>> >> So DFS on the AC lites is basically a sham from what I can tell. >>>>> >> >>>>> >> I pick a dfs channel and the rocket picks it's own channel. Usually a >>>>> >> channel with much higher noise/interference. >>>>> >> >>>>> >> I use the frequency list and it does me no good. >>>>> >> >>>>> >> In addition, I have lot's of frequencies that are in the -90's for >>>>> >> noise and 'auto' picks channels in the -75 to -85. I don't understand >>>>> >> the channel selection for these at all. >>>>> >> >>>>> >> Any thoughts? >>>>> >> >>>>> >> -- >>>>> >> Ethan Dee >>>>> >> Network Admin >>>>> >> Globalvision >>>>> >> 864 704 3600 >>>>> >> [email protected] >>>>> >> >>>>> >> [email protected] >>>>> >> 864 467 1333 >>>>> >> >>>>> >> >>>>> >> >>>>> >> -- >>>>> >> This message has been scanned by E.F.A. Project and is believed to be >>>>> clean. >>>>> >> >>>>> >> >>>>> >> _______________________________________________ >>>>> >> Ubnt_users mailing list >>>>> >> [email protected] >>>>> >> http://lists.wispa.org/mailman/listinfo/ubnt_users >>>>> > _______________________________________________ >>>>> > Ubnt_users mailing list >>>>> > [email protected] >>>>> > http://lists.wispa.org/mailman/listinfo/ubnt_users >>>>> >>>>> -- >>>>> Ethan Dee >>>>> Network Admin >>>>> Globalvision >>>>> 864 704 3600 >>>>> [email protected] >>>>> >>>>> [email protected] >>>>> 864 467 1333 >>>>> >>>>> _______________________________________________ >>>>> Ubnt_users mailing list >>>>> [email protected] >>>>> http://lists.wispa.org/mailman/listinfo/ubnt_users >>>>> >>>>> _______________________________________________ >>>>> Ubnt_users mailing list >>>>> [email protected] >>>>> http://lists.wispa.org/mailman/listinfo/ubnt_users >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> >>>> Ubnt_users mailing list >>>> >>>> [email protected] >>>> >>>> http://lists.wispa.org/mailman/listinfo/ubnt_users >>>> >>> >>> -- >>> >>> Ethan Dee >>> >>> Network Admin >>> >>> Globalvision >>> >>> 864 704 3600 >>> >>> [email protected] >>> >>> >>> >>> [email protected] >>> >>> 864 467 1333 >>> >>> >>> _______________________________________________ >>> Ubnt_users mailing list >>> [email protected] >>> http://lists.wispa.org/mailman/listinfo/ubnt_users >>> >> >> >> _______________________________________________ >> Ubnt_users mailing list >> [email protected] >> http://lists.wispa.org/mailman/listinfo/ubnt_users >> >
_______________________________________________ Ubnt_users mailing list [email protected] http://lists.wispa.org/mailman/listinfo/ubnt_users
