nanog mailing list archives
Re: TCP and WAN issue
From: JAKO Andras <jako.andras () eik bme hu>
Date: Tue, 27 Mar 2007 23:02:28 +0200 (CEST)
Philip,
I have an east coast and west coast data center connected with a DS3. I am running into issues with streaming data via TCP and was wondering besides hardware acceleration, is there any options at increasing throughput and maximizing the bandwidth? How can I overcome the TCP stack limitations inherent in Windows (registry tweaks seem to not functions too well)?
I don't know the RTT, but you should have at least 300 kByte buffers on the end hosts for a 60 ms RTT path to reach 40 Mbps TCP throughput. (This requires window scaling as well.) Is this what you were trying to tune on your Windows hosts? Is your DS3 free of errors? Even a very low packet loss can degrade TCP performance badly. You'll find a lot of useful information about TCP performance in the GEANT2 PERT Knowledge Base at http://www.kb.pert.geant2.net/ Andras
Current thread:
- TCP and WAN issue Philip Lavine (Mar 27)
- Re: TCP and WAN issue Joe Abley (Mar 27)
- Re: TCP and WAN issue Joe Abley (Mar 27)
- Re: TCP and WAN issue Roland Dobbins (Mar 27)
- Re: TCP and WAN issue Robert Boyle (Mar 27)
- Re: TCP and WAN issue JAKO Andras (Mar 27)
- RE: TCP and WAN issue michael.dillon (Mar 27)
- [no subject] Jim Shankland (Mar 27)
- RE: Jumbo frames michael.dillon (Mar 27)
- RE: Jumbo frames Jim Shankland (Mar 27)
- Re: Jumbo frames Andy Davidson (Mar 29)
- RE: Jumbo frames michael.dillon (Mar 29)
- Re: Jumbo frames Stephen Sprunk (Mar 30)
- [no subject] Jim Shankland (Mar 27)
- RE: Jumbo frames Hank Nussbacher (Mar 27)
- Re: TCP and WAN issue Joe Abley (Mar 27)
- Re: Perry Lorier (Mar 27)