[142495] in North American Network Operators' Group
Re: [pfSense Support] Strange TCP connection behavior 2.0 RC2 (+3)
daemon@ATHENA.MIT.EDU (Cameron Byrne)
Tue Jun 28 12:17:18 2011
In-Reply-To: <D181DDABABE57E4DB72FEE0033147864075D66@EALPO1.ukbroadband.com>
Date: Tue, 28 Jun 2011 09:16:13 -0700
From: Cameron Byrne <cb.list6@gmail.com>
To: Leigh Porter <leigh.porter@ukbroadband.com>
Cc: "williamejsalt@googlemail.com" <williamejsalt@googlemail.com>,
NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Jun 28, 2011 at 9:11 AM, Leigh Porter
<leigh.porter@ukbroadband.com> wrote:
>
>
>> -----Original Message-----
>> From: Cameron Byrne [mailto:cb.list6@gmail.com]
>> Sent: 28 June 2011 16:53
>> To: Leigh Porter
>> Cc: Andreas Ott; Eugen Leitl; williamejsalt@googlemail.com; NANOG list
>> Subject: Re: [pfSense Support] Strange TCP connection behavior 2.0 RC2
>> (+3)
>> In the 3G world, i have had good results overcoming longish RTT by
>> using the Hybla TCP algorithm =A0http://hybla.deis.unibo.it/
>>
>> I am hoping it gets more default traction, especially in wireless
>> where the radio link is a pretty big latency source
>>
>> Cameron
>
> How do you implement this for lots of clients and servers that have out o=
f the box implementations? The FastSoft box is a TCP man-in-the-middle box =
that essentially implements the FAST TCP algorithm without either end havin=
g to worry about it.
>
You don't, the full benefits only come with a Linux kernel patch. The
good news is that it only has to be implemented on the client end.
> I have also used home-fudged TCP proxies with some success.
>
> Some 3G/wireless/VSAT vendors implement their own TCP modification stacks=
but they usually only fiddle with window sizes and such.
>
That's why i said i hope it catches on as default :) If Android
implemented Hybla, i think it would be a great improvement for user
experience. Nobody likes the middleboxes that proxy TCP.... they cost
money, don't scale well, and are generally fragile. Hybla is not a
solution for the OPs issue, just a solution for high RTT links where
the client can do Hybla. It an evolutionary step that i think would
make a great fit in smartphones like Android.
Cameron
> --
> Leigh
>
>
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