nanog mailing list archives
Re: TCP and WAN issue
From: Roland Dobbins <rdobbins () cisco com>
Date: Tue, 27 Mar 2007 13:37:03 -0700
On Mar 27, 2007, at 1:26 PM, Philip Lavine wrote:
inherent in Windows (registry tweaks seem to not functions too well)?
You should certainly look at your MTU and MSS values to ensure there are no difficulties of that sort. Is there any other factor such as perhaps slow DNS server (or other lookup-type services) responses which can be contributing to the perceived slowness? How about tuning the I/O buffers on the relevant routers? Can you tune the I/O buffers on the servers?
And what about your link utilization? Is the DS3 sufficient? Take a look at pps and bps, and take a look at your average packet sizes (NetFlow can help with this). Are your apps sending lots of smaller packets, or are you getting nice, large packet-sizes?
Finally, if none of the above help, you could look at something like SCTP, if your servers and apps support it. But I'd go through the above exercise, first.
----------------------------------------------------------------------- Roland Dobbins <rdobbins () cisco com> // 408.527.6376 voice Words that come from a machine have no soul. -- Duong Van Ngo
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)