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Note Not a fix, but a workaround 

Forum: 3Com PCMCIA Ethernet Adapter Issues
Re: Question 3ccfe575bt data corruption (Bas Michielsen)
Date: 2000, Jun 16
From: David Hinds <dhinds@pcmcia.sourceforge.org>

The data corruption was avoided by disabling hardware checksum support in the 3c575_cb driver. I've added a module option, use_hw_csums, to the 3.1.17 version of the driver for this purpose.

This doesn't directly address the corruption problem: it just allows the network layer to automatically detect and reject the damaged packets. I don't have an explanation for how the packets were getting corrupted on their way from the card to system memory.

-- Dave

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