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Folks...

I'm running NetBSD inside a Virtual PC (hosted on Mac OS 10.3).  I'm 
using this primarily for testing kernel changes.

I'm having trouble using the emulated Ethernet.  Small packets are 
fine, but whenever I get a full-size TCP segment, I see:

tlp0: discarding oversize frame (len=1522)

This is 4 bytes larger than the 1518 maximum Ethernet frame size.  I'm 
not using VLANs, so I would not expect to see packets this large.

Using tcpdump on the vpc, it seems as though the extra 4 bytes are just 
zeros.

I'm wondering if anyone else has observed this.  I'm considering 
tweaking the driver to check for this condition on a 21041 (which is 
what Virtual PC emulates) and simply truncate the packet to 1518 bytes.

Thanks...

         -- Jason R. Thorpe <thorpej@wasabisystems.com>

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