I am running lwip with a micrel ksz8851snl driver on a SiliconLabs gecko (ARM CortexM3) processor. lwip is acting as a TCP server. If I connect to the server from a PC running Windows 7 through an ethernet switch everything works fine. If I connect directly to the PC via a crossover cable or connect through an ethernet hub I see lots of dropped packets are retransmissions. Linux PCs work fine regardless of how they are connected to the lwip server.
I am at having a great deal of trouble figuring out why Windows behaves so differently from linux. If someone out there has any ideas I would appreciate the help. Thank you.
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