[Bloat] Curious case of local "Fiber"

[Bloat] Curious case of local "Fiber"

[Bruno George Moraes]

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Finally some option for me to  leave ADSL behind , but here comes the
"Curious case of Fiber to the apartment block" terminated with ether100mbps
to my computer.

http://www.dslreports.com/speedtest/28751645

My NIC is configured to only 1/1 buffers, then MTU 1492 (increased of
default 1480), PPoE login  with Windows 10 using CUBIC.



ISP site with prices in BRL:
http://www.ole.net.br/site/condominio-internet/

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Re: [Bloat] Curious case of local "Fiber"

[Jonathan Morton]

> On 22 Jan, 2018, at 10:07 pm, Bruno George Moraes <brunogm0@gmail.com> wrote:
> 
> My NIC is configured to only 1/1 buffers, then MTU 1492 (increased of default 1480), PPoE login  with Windows 10 using CUBIC.

I didn't know Windows supported CUBIC.  The default AFAIK is Compound TCP, if it isn't NewReno.

In any case, it looks like the bottleneck isn't at your NIC (so your settings don't matter), but at the router terminating the fibre for the whole building.  That's the best place to mitigate the bloat, since it would work for the whole building's uplinks.

 - Jonathan Morton

Re: [Bloat] Curious case of local "Fiber"

[Neal Cardwell]

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On Mon, Feb 12, 2018 at 8:56 AM, Jonathan Morton <chromatix99@gmail.com>
wrote:

> > On 22 Jan, 2018, at 10:07 pm, Bruno George Moraes <brunogm0@gmail.com>
> wrote:
> >
> > My NIC is configured to only 1/1 buffers, then MTU 1492 (increased of
> default 1480), PPoE login  with Windows 10 using CUBIC.
>
> I didn't know Windows supported CUBIC.  The default AFAIK is Compound TCP,
> if it isn't NewReno.
>

FWIW, I believe some recent versions of Windows 10 can be optionally
configured to use CUBIC:

https://blogs.technet.microsoft.com/networking/2017/07/13/core-network-stack-features-in-the-creators-update-for-windows-10/

neal

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Re: [Bloat] Curious case of local "Fiber"

[Jim Gettys]

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On Mon, Feb 12, 2018 at 8:56 AM, Jonathan Morton <chromatix99@gmail.com>
wrote:

> > On 22 Jan, 2018, at 10:07 pm, Bruno George Moraes <brunogm0@gmail.com>
> wrote:
> >
> > My NIC is configured to only 1/1 buffers, then MTU 1492 (increased of
> default 1480), PPoE login  with Windows 10 using CUBIC.
>
> I didn't know Windows supported CUBIC.  The default AFAIK is Compound TCP,
> if it isn't NewReno.
>
> In any case, it looks like the bottleneck isn't at your NIC (so your
> settings don't matter), but at the router terminating the fibre for the
> whole building.  That's the best place to mitigate the bloat, since it
> would work for the whole building's uplinks.
>

​Note, as always, you should locate your bottleneck.

WiFi is also highly suspect; you have terrible bloat in the upload
direction, which is probably typical for a WiFi bottleneck from a
device/laptop.
                                                 - Jim

​

>
>  - Jonathan Morton
>
> _______________________________________________
> Bloat mailing list
> Bloat@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
>

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