no ken i have not tried cranking up the QOS in the radio itself, maybe i will try that
On Sun, Dec 9, 2018 at 4:01 PM Ken Hohhof <af...@kwisp.com> wrote: > Do you see the same thing even if you crank up the QoS settings as far as > they will go? Trying to determine if it’s Cambium’s QoS mechanism or > something else. We enforce speed tiers outside the radios so I don’t have > much experience with how well or poorly Cambium’s QoS implementation works > and whether there are any quirks that might interact badly with Ookla based > speedtests. > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Kurt Fankhauser > *Sent:* Sunday, December 9, 2018 11:18 AM > *To:* af@af.afmug.com > *Subject:* Re: [AFMUG] speedtest.net and Canopy/Cambium QOS / burst bucket > > > > Also here is AP downlink utilization graph for last 24 hours. Clearly AP > is not overloaded only got up to beyond 20% for a very short period of time. > > > > On Sun, Dec 9, 2018 at 12:13 PM Kurt Fankhauser <lists.wavel...@gmail.com> > wrote: > > Ken there is no problem selling 50meg plans on original 450 AP's running > 30 mhz channels that only have a dozen low usage clients. 75/25 downlink > ratio and 30mhz channels should yeild at least 100mbps down on linktests in > 8x. Once you start to load up the AP's its not the original 450 SM's thats > the problem its the AP itself as those things give out at about 70'ish mbps > down (even though the link tests show there is more capacity). At that > point you just switch the AP out with a 450i and you can take advantage of > the beyond 70mbps downlinks. > > > > My original problem is not related to running out of capacity on the AP as > I am clearly able to get the bandwidth there with the > www.openspeedtest.com site as well as Mikrotik Btest (see attached pic). > Yes the attached pic is a Mikrotik router doing a TCP BTEST through an > original 450SM and original 450AP that has 15 clients attached to it! > > > > On Sun, Dec 9, 2018 at 9:55 AM Ken Hohhof <af...@kwisp.com> wrote: > > OK, this comment conflicts with your report that the problem only shows up > when testing with speedtest.net. But still, I have to question the > wisdom of selling 50M plans using Cambium 450. That’s a lot of throughput > for a multipoint platform, and is only going to work if the stars are > aligned. > > > > Is this a 450, 450i, or 450m AP? What about the SM? You could be running > into CPU limitations on packets per second. > > > > Are you using 20,30 or 40 MHz channel width? What down/up ratio? If your > configured for 20 MHz and 75%, you’re selling one subscriber almost the > total capacity of the AP. > > > > Is this subscriber at 8x modulation? Do you have other subs on the AP at > lower modulations, and if so, are their QoS settings a lot lower so they > get lower priority, or are you using the new SM priority features? A bunch > of subs at 2x or 4x can eat up AP capacity pretty quick. I’m assuming this > isn’t a 450m with MUMIMO. > > > > Are you monitoring/graphing AP frame utilization? This will help diagnose > if the AP is running out of capacity and having to decide which SM gets the > available over-the-air frames. > > > > My impression (could be wrong) is that the Ookla speedtest doesn’t take a > goodput approach, it seeks out the highest transmit rate at which the > packet loss is tolerable. I also saw a claim by one of the bandwidth > management products that 450 and ePMP QoS work differently, 450 by dropping > packets, and ePMP by buffering them, I don’t know if that’s correct. It > could be that running 450 QoS so close to total AP capacity, there is some > kind of clumping of packet delivery going on that speedtest.net > interprets as having hit the max connection speed. > > > > That said, I believe I have seen 50 Mbps speedtest.net results using a > 450 SM at 8x modulation off a lightly loaded 450 AP, although that seems > like it would be pushing the CPU limits of both AP and SM. Better > combination would a 450i or 450m AP with a 450b SM. I don’t sell 50M > plans, at that point I would consider that I need a dedicated PTP link to > the customer and they are buying DIA service. But even at 25M, I would use > a 450b SM rather than an uncapped 450SM or an upgrade key. Maybe everyone > has switched to 450b by now, but we still have mostly the regular 450 SMs. > Not gonna go out and swap them all, especially since a lot of them were > swaps from FSK or 430. Tired of throwing away $250 SMs every few years. > > > > > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Kurt Fankhauser > *Sent:* Saturday, December 8, 2018 9:43 PM > *To:* af@af.afmug.com > *Subject:* Re: [AFMUG] speedtest.net and Canopy/Cambium QOS / burst bucket > > > > here is burst bucket settings, selling customer 50M plan > > > > On Sat, Dec 8, 2018 at 7:57 PM Sean Heskett <af...@zirkel.us> wrote: > > What are your qos settings on the cambium radios? > > > > We don’t see this behavior at all so I’d be glad to help you work through > it. > > > > -Sean > > > > On Sat, Dec 8, 2018 at 5:07 PM Kurt Fankhauser <lists.wavel...@gmail.com> > wrote: > > Is there something with Canopy/Cambium Radios (PMP450) that gives reduced > speed results when done behind SM's with speedtest.net? > > > > I always tell customers to use www.openspeedtest.com for the most > accurate download speeds because my customers on the 50meg plans running > 450 SM's are wanting to see proof that their connection is getting that and > openspeedtest.com is the only test site that will show near 50 meg tests. > Go right over to speedtest.net and get in the 20's on the testing. This > has been a problem for me for years. I just tell the customer that we do > all testing on openspeedtest.com and any other test site is overloaded > which is why results are slow so we do not support those other sites. Now > if i plug directly into switches at towers with my laptop or am on a > connection that is behind an AF5X radio then speedtest.net works > perfectly fine and i can easily get tests of 150-200mbps. > > > > So this appears to be isolated to Cambium 450 radios and only on certain > speedtest sites. All CPE's are in bridge mode and have Mikrotik routers on > customer sites. And unlimited throughput keys on the SM's. Also I must add > I can do a MT Btest using TCP and still get the 50mbps test over the 450 SM > so what the heck is going on with speedtest.net and Cambium 450 > radios?????? > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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