I had a huge increase in complaints last tuesday and wednesday. We saw the same thing. I wanted to dig a hole in the sand.
Craig Schmaderer Cell 402-380-1245 Skywave Wireless, Inc. On Tue, Jul 19, 2016 at 8:27 PM -0500, "George Skorup" <[email protected]<mailto:[email protected]>> wrote: Sure. On 7/19/2016 8:07 PM, Mike Hammett wrote: Can any of you seeing this problem grab some packet captures the next time you see it? It's worth actually digging into. ----- Mike Hammett Intelligent Computing Solutions<http://www.ics-il.com/> [http://www.ics-il.com/images/fbicon.png]<https://www.facebook.com/ICSIL>[http://www.ics-il.com/images/googleicon.png]<https://plus.google.com/+IntelligentComputingSolutionsDeKalb>[http://www.ics-il.com/images/linkedinicon.png]<https://www.linkedin.com/company/intelligent-computing-solutions>[http://www.ics-il.com/images/twittericon.png]<https://twitter.com/ICSIL> Midwest Internet Exchange<http://www.midwest-ix.com/> [http://www.ics-il.com/images/fbicon.png]<https://www.facebook.com/mdwestix>[http://www.ics-il.com/images/linkedinicon.png]<https://www.linkedin.com/company/midwest-internet-exchange>[http://www.ics-il.com/images/twittericon.png]<https://twitter.com/mdwestix> The Brothers WISP<http://www.thebrotherswisp.com/> [http://www.ics-il.com/images/fbicon.png]<https://www.facebook.com/thebrotherswisp>[http://www.ics-il.com/images/youtubeicon.png] <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> ________________________________ From: "Ken Hohhof" <[email protected]><mailto:[email protected]> To: [email protected]<mailto:[email protected]> Sent: Tuesday, July 19, 2016 7:37:42 PM Subject: Re: [AFMUG] CDN overload I saw it to various customers for 2 days starting mid day last Tuesday. It has not come back. Even today, which is Tuesday again. I wonder if it had something to do with the expiration of the free Windows 10 upgrades on July 29. And then the “Anniversary Update” rolls out starting Aug. 2. I had one tower fed via a licensed link but with only a Fast Ethernet port on the router at one end. Not usually a problem since peak bandwidth at that tower never approaches 100M. But with 100-150M of traffic for one customer, the link was being saturated for 5-10 minute intervals. So clearly they were not following TCP congestion management. I quickly added another GigE EHWIC module to the Cisco router so it wouldn’t happen again, but something really nasty was going on. From: George Skorup<mailto:[email protected]> Sent: Tuesday, July 19, 2016 7:06 PM To: [email protected]<mailto:[email protected]> Subject: Re: [AFMUG] CDN overload Noop. As I said, Microsuck at one point was sending to a 1.5Mbps customer at nearly 25Mbps. Confirmed single machine. I believe it was all the same source address, but like 20 separate streams. Happened to a guy on Saturday as well. Yet another 1.5Mbps 900MHz customer. Single PC directly to the radio. I was torching him and saw about 12Mbps coming from MS's 13.x. Then it would settle for a while and pick right back up again from LLNW at 6-8Mbps. That guy opened a ticket and said he was getting less than 100kbps download speed and no web pages would load. He responded about an hour later and said everything was normal. And yet another customer on Wednesday on PMP450 at 12Mbps tier was being sent over 30Mbps. On 7/19/2016 2:41 PM, Mike Hammett wrote: Were all CDNs sending way more than the pipe size or only LimeLight? Someone at Akamai sent out this message last week regarding a general increase in usage: ===== There were two major software updates that spanned Tuesday and Wednesday which are responsible for the increase you saw. ===== ----- Mike Hammett Intelligent Computing Solutions<http://www.ics-il.com/> [http://www.ics-il.com/images/fbicon.png]<https://www.facebook.com/ICSIL>[http://www.ics-il.com/images/googleicon.png]<https://plus.google.com/+IntelligentComputingSolutionsDeKalb>[http://www.ics-il.com/images/linkedinicon.png]<https://www.linkedin.com/company/intelligent-computing-solutions>[http://www.ics-il.com/images/twittericon.png]<https://twitter.com/ICSIL> Midwest Internet Exchange<http://www.midwest-ix.com/> [http://www.ics-il.com/images/fbicon.png]<https://www.facebook.com/mdwestix>[http://www.ics-il.com/images/linkedinicon.png]<https://www.linkedin.com/company/midwest-internet-exchange>[http://www.ics-il.com/images/twittericon.png]<https://twitter.com/mdwestix> The Brothers WISP<http://www.thebrotherswisp.com/> [http://www.ics-il.com/images/fbicon.png]<https://www.facebook.com/thebrotherswisp>[http://www.ics-il.com/images/youtubeicon.png] <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> ________________________________ From: "George Skorup" mailto:[email protected] To: [email protected]<mailto:[email protected]> Sent: Thursday, July 14, 2016 1:33:21 AM Subject: Re: [AFMUG] CDN overload I forgot about this. Yes. A little later in the day, I started to see a lot of 13.n.n.n sources. Microsoft. Yeah, update Tuesday. Then the same customer would start receiving from LLNW. Then Akamai. And back to MS again. So it looks like they're *still* distributing updates across various CDNs. And believe me, it's not like they were all hitting this customer at once. One single CDN would try to send at 5-10X the customer's downlink MIR. Sometimes more. At one point I saw over 20Mbps for 5-10 minutes. I saw pretty much the same thing with about 15 other customers that I looked at. And they were spread across 5-6 towers. Some directly licensed fed, others farther towards the edge. DDoS. CDN. Same thing. Or gorilla tactics at the very least. If the customer calls and says "none of my other shit works, your internet sucks" what are we supposed to do? Oh OK, here, we'll turn you up to 12Mbps and see what that does. Yeah screw that because now the CDN is sending at 40Mbps! They need to stop fucking with TCP already! And no, it doesn't matter where I put the policing/shaping. They still eat up bandwidth on our upstreams. Like you said before Ken, yeah, it just moves the problem somewhere else. On 7/13/2016 11:39 PM, Ken Hohhof wrote: George, did you identify the application or content provider, or only the CDN? I think I started getting hit with the same thing early yesterday afternoon. At first I thought I was getting DDOS attacks. From: George Skorup<mailto:[email protected]> Sent: Tuesday, July 12, 2016 6:21 PM To: [email protected]<mailto:[email protected]> Subject: Re: [AFMUG] CDN overload Yup. LLNW. On 7/12/2016 5:35 PM, Ken Hohhof wrote: I assume you torched the traffic and verified it is all coming from a particular CDN, not a random bunch of IPs as would be the case with BT. Since this isn’t your first rodeo. From: George Skorup<mailto:[email protected]> Sent: Tuesday, July 12, 2016 5:31 PM To: [email protected]<mailto:[email protected]> Subject: Re: [AFMUG] CDN overload Because they dick with TCP. On 7/12/2016 5:23 PM, Eric Kuhnke wrote: And why is it the fault of the CDN? It could be a customer with a 100-peer bittorrent session downloading 30GB of Ubuntu DVD ISOs. On Tue, Jul 12, 2016 at 3:13 PM, George Skorup <[email protected]<mailto:[email protected]>> wrote: I have had it with these CDNs sending more traffic than the last mile can handle. Got a customer at 1.5Mbps on 900 FSK and they're sending to her at 15Mbps. Of course the AP reports RF downlink overloaded.
