+1 Jon Langeler Michwave Technologies, Inc.
> On Mar 23, 2016, at 8:24 AM, Ken Hohhof <[email protected]> wrote: > > 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 outdated once it will work flawless.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. > � >
