Wireshark-users: Re: [Wireshark-users] FTP - TCP Previous segment lost, TCP Dup ACK, TCP Retransm
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From: Hansang Bae <hbae@xxxxxxxxxx>
Date: Fri, 07 Dec 2007 12:02:10 -0500
Sake Blok wrote:

Have you checked the physical port settings for the servers and switches
in Valley Forge? It could just be the server on fixed (100Mb/Full duplex?)
and the switch on auto (or vice versa).
Doh! I meant to put that as item number one. You can't imagine the number of "problems" that get escalated to me, only to find out that duplex mismatch was the problem.
To the original poster. Keep in mind that back in the days the "eliminate the negotiate" was a good mantra. these days, it's nothing but a headache as auto-negotiation is rock solid. Also, note that GigE copper *requires* the use of auto-negotiation. 


--
Thanks,
Hansang