Subject: Re: Networking oddity between Debian and NetBSD
To: Mason Loring Bliss <email@example.com>
From: Greg Troxel <firstname.lastname@example.org>
Date: 11/30/2004 19:13:57
tcpdump -w foo tcp
tcpdump -tt -S -r foo | tcpdump2xplot
[read the README in the xplot sources]
xplot *.xplot, and look at the plots.
You might also take tcpdumps on both ends, process them, and then
xplot -x -y -tile linux-capture.xplot netbsd-capture.xplot
for the same connection. In all of this, you should be able to see if
acks happen when they should, and see retransmissions.
Note that changing kernels changing results doesn't rule out PHY-layer
problems, if the PHY is set up wrong in one case.
Greg Troxel <email@example.com>