I have had this box that would simply lose connectivity every day or so
for a hot minute! The link would still be lit and all that, brand new
patch cables, latest Kernel (by Distro). Anyhow after some hard work
(research that is) some weird thing solved the problem. The driver is
an e1000 (Intel Gigabit driver). These new guys have a TSO feature (TCP
Segmentation Offload) by which "enables a system's protocol stack to
offload portions of outbound TCP
processing to a network interface card thereby reducing system CPU
utilization and enhancing performance." Apparently this is not perfect
yet and turning it off solved my problem.
ethtool -K eth0 tso off
Just my $0.02
p.s. You can get it from here
http://sourceforge.net/projects/gkernel/--
abulyomon
www.KiLLTHeUPLiNK.com
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