[CentOS] 8139 dropping packets

Sun Oct 28 17:30:00 UTC 2012
Bob Puff <bob at nleaudio.com>

Check your duplex.  I have had two recent problems with duplex:

One, with a Cisco router - it auto-negotiated every time to half duplex, even
though it really -was- full.  Use mii-tool to find out.

Two, with a RR modem - the speed was forced to 10mb half duplex instead of
100mb full duplex.  All sorts of strange loss.  Once I put it back, all was well.

I have used TONs of 8139s, and while I do see where they are not the fastest
kid on the block, I cannot say I've seen packet loss.