TX power and antenna gains are set correctly. I'll give you some context. I spent a month working with Cambium support last year on why a brand new 450i AP, with no SM's registered, would go into constant DFS. No rhyme or reason. Up to 10 times per day. Firmware 15.1.1. The ticket was left unresolved.
BTW, I took Sean's advice and downgraded an couple AP's from 15.1.1 to 15.0.2 and the false detection's have completely stopped. If you'd like to know just how rampant the issue is, just search the Cambium forums for 450+DFS. You'll get an idea of how bad things have gotten. On Fri, Jun 1, 2018 at 8:02 AM Dave <[email protected]> wrote: > Ok, So DFS? > If your antenna/dish gains are set correctly in each link at each end > setting correct power level should be a breeze. > Reflections from your own link can cause events to occur if this is not > set correctly. Also, Ensure there are no other overlapping links or nearby > radios on the same or near channel. > > 2cents > > > > On 05/30/2018 03:56 PM, Eric Muehleisen wrote: > > This is interesting. I definitely want to be in compliance, but I also > know that these detection are 100% false. We have redundant AP's on the > same tower mounted at the same height pointing the same direction, but > 20mhz apart, and they don't trip DFS. It's like there is a magical packet > or multipath event that causes this. We may have to give 15.0.2 a try. > > On Wed, May 30, 2018 at 3:48 PM Darren Shea <[email protected]> wrote: > >> I’ll vouch for Sean’s experience on these – we also had to roll back a >> bunch of DFS 15.1-15.1.3 APs to 15.0.2 to deal with a ridiculous level of >> false radar detections. I haven’t yet tried 15.1.5 on any of those, but >> there wasn’t any indication they dealt with that in release notes. >> >> >> >> n Darren >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *Sean Heskett >> *Sent:* Wednesday, May 30, 2018 3:45 PM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] Epmp vs 450 - DFS events >> >> >> >> 15.0.2 is the least finicky with DFS. above that cambium changed the >> code to be more restrictive to meet new FCC rules (or something like that) >> >> >> >> On Wed, May 30, 2018 at 2:41 PM, Eric Muehleisen <[email protected]> >> wrote: >> >> If someone has the holy grail on what firmware for reducing DFS on 450. >> I'd love to hear it. We are on 15.1.1 and the false DFS hits are killing us >> lately. See attached. This is one AP for the past couple days. It's been >> terrible around here. >> >> [image: DFS_450.png] >> >> >> >> On Wed, May 30, 2018 at 3:35 PM [email protected] < >> [email protected]> wrote: >> >> For ePMP it depends on the version number. 2.6.2.1 had very stable DFS >> performance and for APs where we saw issues, we have left >> >> it there. Some links are working fine on the latest firmware though. >> >> >> >> On Wed, May 30, 2018 at 3:50 PM, George Skorup <[email protected]> >> wrote: >> >> My experience is exactly the opposite here. ePMP seems more sensitive to >> DFS events. By far. >> >> On 5/30/2018 12:25 PM, Gino A. Villarini wrote: >> >> Anyone noticed that apparently the Epmp radios are less prone to DFS >> events? Im assuming most are false caused by RF interference, but I see way >> less events on Epmp than on 450� Will have to do a side by side study.� >> >> � >> >> *Gino A. Villarini* >> >> President >> >> Metro Office Park #18 Suite 304 Guaynabo, Puerto Rico 00968 >> >> *Error! Filename not specified.* >> >> >> >> >> >> >> > > -- >
