I'm not graphing at the SM by snmp. Maybe I should be. Sent from my iPad
Kurt Fankhauser Wavelinc Communications P.O. Box 126 Bucyrus, OH 44820 http://www.wavelinc.com tel. 419-562-6405 fax. 419-617-0110 > On Apr 26, 2015, at 12:35 PM, Ken Hohhof <[email protected]> wrote: > > Do you have a graph via SNMP of the actual SM traffic? See if the AP is only > scheduling the configured amount of traffic to the customer, and throwing > away the rest. If yes, the Procera probably gives you the tools to limit > this traffic to X% of the customer’s subscribed rate, although it will still > consume your upstream bandwidth. If not, then your suspicion of Cambium > sustained rate limit not working might be true. We don’t rely on that > feature as a primary means of rate limiting customers, so I wouldn’t > necessarily know if it is broken. If it is broken, I’m wasting a lot of > money buying SM20’s. > > > From: Kurt Fankhauser > Sent: Sunday, April 26, 2015 11:16 AM > To: [email protected] > Subject: Re: [AFMUG] 450SM sustain bucket throttle not working.. > > I'm measuring at the upstream router which is actually a Procera Box. (not > actually a rotuer) Customer called last night complaining speeds were > horrible.... > > > Kurt Fankhauser > Wavelinc Communications > P.O. Box 126 > Bucyrus, OH 44820 > http://www.wavelinc.com > tel. 419-562-6405 > fax. 419-617-0110 > >> On Sun, Apr 26, 2015 at 12:01 PM, Ken Hohhof <[email protected]> wrote: >> Sorry to answer a question with a question, but are you measuring at the SM, >> or at some upstream router? >> >> The reason I ask, is I have seen some CDN traffic that does not seem to >> follow traditional TCP congestion control. It will send at twice the rate >> limit, causing 50% packet loss to its own traffic and everything else to >> that same subscriber. Evidently some TCP geniuses have decided to use >> latency rather than packet loss as the indicator of congestion, and that the >> objective is goodput not throughput. Works for last mile technologies like >> T1 and DSL with big buffers at the head end of the fixed speed serial >> connection, not so good with the type of rate limit queues we tend to use >> unless we can provision the queues with big buffers. >> >> Probably not your problem, but I thought I’d bring it up just in case. >> >> From: Kurt Fankhauser >> Sent: Sunday, April 26, 2015 10:50 AM >> To: [email protected] >> Subject: [AFMUG] 450SM sustain bucket throttle not working.. >> >> I have a 450 SM that is rate limited in the SM to 1500kbps download on the >> sustain side. I noticed last night that this customer was pulling a steady >> almost 3mbps download for several hours on end. How is this possible? Is >> there a problem with 13.2 firmware? Its a 3.65ghz SM. >> >> see attached. >> >> Kurt Fankhauser >> Wavelinc Communications >> P.O. Box 126 >> Bucyrus, OH 44820 >> http://www.wavelinc.com >> tel. 419-562-6405 >> fax. 419-617-0110 > >
