RE: 10gig coast to coast

[James Braunegg <james.braunegg () micron21 com>]

Dear All

We Deal with TCP window size all day every day across the southern cross from LA to Australia which adds around 
160ms...  I've given up looking for a solution to get around physical physics of sending TCP traffic a long distance at 
a high speed....

UDP traffic however comes in very fast....

Kindest Regards

James Braunegg
W:  1300 769 972  |  M:  0488 997 207 |  D:  (03) 9751 7616
E:   james.braunegg () micron21 com  |  ABN:  12 109 977 666   



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-----Original Message-----
From: Phil Fagan [mailto:philfagan () gmail com] 
Sent: Wednesday, June 19, 2013 12:16 AM
To: Jakob Heitz
Cc: <nanog () nanog org>
Subject: Re: 10gig coast to coast

Sorry; yes Sawtooth is the more accurate term. I see this on a daily occurance with large data-set transfers; generally 
if the data-set is large multiples of the initial window. I've never tested medium latency(
<100ms) with small enough payloads where it may pay-off threading out many thousands of sessions. However, medium 
latency with large files (50M-10G) threads well in the sub 200 range and does a pretty good job at filling several Gig 
links. None of this is scientific; just my observations from the wild.....infulenced by end to end tunings per 
environment.




On Tue, Jun 18, 2013 at 7:45 AM, Jakob Heitz <jakob.heitz () ericsson com>wrote:

> Thanks Fred. Sawtooth is more familiar.
> How much of that do you actually see in practice?
>
> Cheers,
> Jakob.
>
>
> On Jun 18, 2013, at 6:27 AM, "Fred Reimer" <freimer () freimer org> wrote:
>
> > It is also called a "sawtooth" or similar terms.  Just google "tcp 
> > sawtooth" and you will see many references, and images that depict 
> > the traffic pattern.
> >
> > HTH,
> >
> > Fred Reimer | Secure Network Solutions Architect Presidio | 
> > www.presidio.com <http://www.presidio.com/>
> > 3250 W. Commercial Blvd Suite 360, Oakland Park, FL 33309
> > D: 954.703.1490 | C: 954.298.1697 | F: 407.284.6681 |
> freimer () presidio com
> > CCIE 23812, CISSP 107125, HP MASE, TPCSE 2265
> >
> >
> >
> >
> > On 6/18/13 9:20 AM, "Jakob Heitz" <jakob.heitz () ericsson com> wrote:
> >
> > > > Date: Mon, 17 Jun 2013 22:04:52 -0600
> > > > From: Phil Fagan <philfagan () gmail com> ... you could always thread 
> > > > the crap out of whatever it is your transactioning across the link 
> > > > to make up for TCP's jackknifes...
> > >
> > > What is a TCP jackknife?
> > >
> > > Cheers.
> > > Jakob.


--
Phil Fagan
Denver, CO
970-480-7618