[186778] in North American Network Operators' Group
Re: Netflix stuffing data on pipe
daemon@ATHENA.MIT.EDU (Justin Wilson)
Mon Jan 4 00:26:15 2016
X-Original-To: nanog@nanog.org
From: Justin Wilson <lists@mtin.net>
Date: Mon, 4 Jan 2016 00:26:09 -0500
To: NANOG <nanog@nanog.org>
In-Reply-To: <CA+78=sHojjzm3uWmG00GQ9UnFu1h4PGYyLf7HE6cdooSSRBAJw@mail.gmail.com>
Errors-To: nanog-bounces@nanog.org
Netflix is streaming video. It will try to do the best data rate it =
can. If the connection can handle 4 megs a second it is going to try =
and do 4 megs a second. If the network can=E2=80=99t handle it then =
Netflix will back off and adapt to try and fit.=20
Keep in mind, at least last I knew, a full HD stream was somewhere =
around 5 megs a sec. If the customer has a 4 meg plan it will try and =
fill up that 4 megs unless the algorithm backs off and steps it down. =
ISPs who run into this on lower packages need to implement QOS at the =
customer level to deal with streaming. This can be done several ways. =
This is one reason an endpoint the ISP controls is a huge asset, =
especially if it does QOS.=20
Justin Wilson
j2sw@mtin.net
---
http://www.mtin.net Owner/CEO
xISP Solutions- Consulting =E2=80=93 Data Centers - Bandwidth
http://www.midwest-ix.com COO/Chairman
> On Dec 31, 2015, at 1:39 PM, Evelio Vila <evelio@thousandeyes.com> =
wrote:
>=20
> It is actually buffer-based, as it picks the video rate as a function =
of
> the current buffer occupancy.
>=20
> See here http://yuba.stanford.edu/~nickm/papers/sigcomm2014-video.pdf
>=20
> --
> evelio
>=20
> On Tue, Dec 29, 2015 at 6:56 PM, Matt Hoppes =
<mhoppes@indigowireless.com>
> wrote:
>=20
>> Has anyone else observed Netflix sessions attempting to come into =
customer
>> CPE devices at well in excess of the customers throttled plan?
>>=20
>> 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.
>>=20
>> 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.
>>=20
>> Curious if anyone else has seen it?
>=20
