Netflix stuffing data on pipe

Mike Hammett nanog at
Wed Dec 30 13:46:48 UTC 2015

I believe others have observed a similar situation with at least one other CDN and the situation continued solid for hours, not just occasional capacity detection. 

Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

----- Original Message -----

From: "Josh Reynolds" <josh at> 
To: "Matt Hoppes" <mhoppes at> 
Cc: "NANOG" <nanog at> 
Sent: Tuesday, December 29, 2015 9:10:51 PM 
Subject: Re: Netflix stuffing data on pipe 

Adaptive bandwidth detection. 
On Dec 29, 2015 8:59 PM, "Matt Hoppes" <mhoppes at> wrote: 

> Has anyone else observed Netflix sessions attempting to come into customer 
> CPE devices at well in excess of the customers throttled plan? 
> I'm not talking error retries on the line. I'm talking like two to three 
> times in excess of what the customers CPE device can handle. 
> I'm observing massive buffer overruns in some of our switches that appear 
> to be directly related to this. And I can't figure out what possible good 
> purpose Netflix would have for attempting to do this. 
> Curious if anyone else has seen it? 

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