[43192] in North American Network Operators' Group
Buffers and TCPWindowsize...WAS: PTP latency
daemon@ATHENA.MIT.EDU (Christopher Wolff)
Tue Oct 2 00:28:10 2001
Date: Mon, 1 Oct 2001 21:24:11 -0700
Message-Id: <200110012124.AA17171028@mail.turbonet.net>
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From: "Christopher Wolff" <chris@bblabs.com>
Reply-To: <chris@bblabs.com>
To: <nanog@merit.edu>
Errors-To: owner-nanog-outgoing@merit.edu
Dear list,
Thank you for all the great responses regarding the PTP latency issue. This was very thorough information that will help me make a decision.
A related, yet somewhat separate issue that I would like some advice on is what kind of circumstances would cause a tcp congestion window to be reduced over a WAN connection, assuming that the servers on both sides are not busy (or even barely utilized). Assuming that a 1472 byte packet could pass freely from WAN point A to WAN point B without being defragmented, it has been suggested to me that somehow windowing is playing a role in poor throughput.
I understand the role that windowing plays in tcp/ip, I guess what I'm wondering is how that packet could get 'squeezed' as it passes through a WAN.
Thank you,
Christopher
