The best way to avoid problems with DFS is to use another sub-band, I don’t think any gear is going to be problem free at all locations, it’s a crap shoot. Do you have non DFS sub-bands at the low end of 5 GHz available where you are?
I want to go back in a time machine and terminate whoever came up with the bright idea that DFS would allow shared use of spectrum for anything but opportunistic or hobby use, not the Internet which we know is the most important thing in the whole world, more important than food, water and air, and must work reliably 24x7. From: Stefan Englhardt Sent: Wednesday, March 23, 2016 5:31 AM To: [email protected] Subject: Re: [AFMUG] ePMP rant The SMs disconnect from AP and then reconnect. Due to DFS and CAC this is an outage of >60s for the customer. Happens on different sites and different Signal levels. Most affected are customers very close which see multiple sectors of a cluster. They connect with good signal to the wrong sector once they are kicked from the matching sector. But I see this on an omni installation, too. I went thru with cambium first level support and stopped this due to time consuming and senseless trial and error with every single parameter. We on our own tried different freqencies, changed from synced to flexible mode … I dont want to debug any longer. On another site I have some gps-issues where an AP droping all clients even within the configured gps holdoff time due to loosing gps. It shows more than enough Satellites all day long. So may be an interference issue together with a SW-Problem rendering the holdoff time unusable. This happens from time to time and gives some angry customers. I just lost faith in this gear. It works for most customers but it is outdated once it will work flawless. We should have stayed with Mikrotik 11n until UBNT had their AC gear stable enough. Now with 7.2 and the newest 8.x Beta this is working very well. We use the Rocket AC PTMP with filtering in 20 MHz Channels which seems to be a sweet spot for this gear. Only happy customers so far. Von: Af [mailto:[email protected]] Im Auftrag von Adam Moffett Gesendet: Mittwoch, 23. März 2016 11:02 An: [email protected] Betreff: Re: [AFMUG] ePMP rant I've been playing with ePMP, but only on a small scale.� What is the symptom of these disconnects?� Is the SM losing connection to the AP, or do you mean something layer3 like dropping TCP connections? ....I ask because I want to check if I'm having the same problem and haven't noticed. On 3/23/2016 3:23 AM, Stefan Englhardt wrote: We pull the plug now on our ePMP installations. We still have disconnects. Every day a disappointed customer calls. We dont look at this anymore. We give them a Mikrotik or a UBNT AC to make them happy and take the ePMP SM back. � We had several problems with SW quality in the past. We had bad SMs we need to RMA. At some time it seems stable. Now problems came back. Not sure it is SW or HW. We dont want to bother any longer. This gear is low quality no matter what is said by marketing. � We go UBNT AC now. Blazing fast webinterface, background channel scan and more speed on 20MHz Channels. Everywhere we use it we have much better results than with ePMP. These ePMP fans want to tell 11ac is not needed as 256QAM is never achievable. we see it at most of our installed cpes. If signal is to weak for 256QAM there are cheap dish-cpes. �
