Dear Valdis Thanks for your comments, whilst I know you can optimize servers for TCP windowing I was more talking about network backhaul where you don't have control over the server sending the traffic.
ie backhauling IP transit over the southern cross cable system Kindest Regards James Braunegg W: 1300 769 972 | M: 0488 997 207 | D: (03) 9751 7616 E: james.braun...@micron21.com | ABN: 12 109 977 666 This message is intended for the addressee named above. It may contain privileged or confidential information. If you are not the intended recipient of this message you must not use, copy, distribute or disclose it to anyone other than the addressee. If you have received this message in error please return the message to the sender by replying to it and then delete the message from your computer. -----Original Message----- From: valdis.kletni...@vt.edu [mailto:valdis.kletni...@vt.edu] Sent: Wednesday, June 19, 2013 3:19 AM To: James Braunegg Cc: Phil Fagan; Jakob Heitz; <nanog@nanog.org> Subject: Re: 10gig coast to coast On Tue, 18 Jun 2013 15:53:48 -0000, James Braunegg said: > 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.... http://www.extremetech.com/extreme/141651-caltech-and-uvic-set-339gbps-internet-speed-record It's apparently doable. ;) A quick cheat sheet for the low-hanging fruit: http://www.psc.edu/index.php/networking/641-tcp-tune Though to get to *really* high througput, you may have to play some games with TCP slow-start so it's not quite as slow (otherwise for long hauls it can take literally hours to open the window after a packet burp at 10G or higher) Also, you may want to look at CODEL or related queueing disciplines to minimize the amount of trouble that bufferbloat can cause you at high speeds.
