What CDN? Mostly LLNW and Microsoft What have you identified the traffic to be? Mostly Windows Update What is the access network? I don't understand the question; PTMP wireless? Where is the rate limiting done? At the PMP450 Access Point How is the rate limiting done (policing vs. queueing, SFQ, PFIFO, etc,, etc.)? However the PMP450 does it; token bucket I think? What is doing the rate limiting? PMP450 What is the rate-limit set to? Burst up to 15 Mbps, and sustained between 2-10 Mbps depending on plan. Upstream of the rate-limiter, what are you seeing for inbound traffic? Up to the burst bandwidth limit, but never higher. One connection or many? I've seen 30+, but this is rare; it's usually ~5-10. How much traffic? I don't understand the question. How does other traffic behave when exceeding the rate limit? Other applications and services fall apart when most of their packets get discarded at the PMP450. Where is NAT performed? NAT to the public IP is performed at our upstream edge, but there are usually two more layers at the PMP450 CPE, and at the customer's router. What is doing NAT? Mikrotik, PMP450, and SOHO router Shared NAT or isolated to that customer? Shared public IP for everyone on that PTMP Access Point. Have you done a packet capture before and after the rate limiter? The NAT device? No Would you be willing to send a filtered packet capture (only the frames that relate to this CDN) to the CDN if they want it? No
On Mon, Sep 19, 2016 at 9:43 PM, Mike Hammett <af...@ics-il.net> wrote: > Have you seen a CDN overloading a customer? Help me gather information on > the issue. > > What CDN? > What have you identified the traffic to be? > What is the access network? > Where is the rate limiting done? > How is the rate limiting done (policing vs. queueing, SFQ, PFIFO, etc,, > etc.)? > What is doing the rate limiting? > What is the rate-limit set to? > Upstream of the rate-limiter, what are you seeing for inbound traffic? > One connection or many? > How much traffic? > How does other traffic behave when exceeding the rate limit? > Where is NAT performed? > What is doing NAT? > Shared NAT or isolated to that customer? > Have you done a packet capture before and after the rate limiter? The NAT > device? > Would you be willing to send a filtered packet capture (only the frames > that relate to this CDN) to the CDN if they want it? > > > > There have been reports of CDNs sending more traffic than the customer can > handle and ignores TCP convention to slow down. Trying to investigate this > thoroughly so we can get the CDN to fix their system. Multiple CDNs have > been shown to do this. > > > > ----- > Mike Hammett > Intelligent Computing Solutions <http://www.ics-il.com/> > <https://www.facebook.com/ICSIL> > <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> > <https://www.linkedin.com/company/intelligent-computing-solutions> > <https://twitter.com/ICSIL> > Midwest Internet Exchange <http://www.midwest-ix.com/> > <https://www.facebook.com/mdwestix> > <https://www.linkedin.com/company/midwest-internet-exchange> > <https://twitter.com/mdwestix> > The Brothers WISP <http://www.thebrotherswisp.com/> > <https://www.facebook.com/thebrotherswisp> > > > <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> >
