nanog mailing list archives

Re: Netflix stuffing data on pipe


From: Rob Seastrom <rs-lists () seastrom com>
Date: Mon, 4 Jan 2016 10:35:58 -0500

I haven't done packet dumps to verify the behavior (too busy catching up on holiday email) but I can't help but wonder 
if IW10 (on by default in FreeBSD 10 which I believe might be what Netflix has underneath) is causing this problem, and 
that maybe a more gentle CWND ramp-up (or otherwise tweaking the slow start behavior) for prefixes that are known to be 
in networks with weak hardware might be a good choice.

Of course this would be a change on Netflix's end...  as for things the ISP could do to alleviate the problem the 
answer is always "sure, but it'll cost ya".

-r


On Jan 4, 2016, at 3:11 AM, Pete Mundy <pete () fiberphone co nz> wrote:


Very succiently put, Owen!

I concur.

Is anything the ISP could avoid to alleviate this occurrence, or is it entirely a 'server-side' issue to resolve?

Pete


On 4/01/2016, at 8:42 pm, Owen DeLong <owen () delong com> wrote:

As I understand it, the problem being discussed is an oscillation that is created when the reaction occurs faster 
than the feedback resulting in a series of dynamically increasing overcompensations.

Owen


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