Hello,
Bob Tracy a écrit :
(Issues with a DM9601 USB 1.1 10/100 Ethernet adapter.)
Problem solved, at least for the time being. Turns out this cheap
device doesn't handle fragmentation very well. Scaling back the MTU to
1000 did the trick: kind of reminds me of the tricks I used to have to
use with SLIP links back in "the good old days." It's possible a higher
MTU value would work, but the default (1500) doesn't work, and the normal
PPPoE value of 1492 didn't make any difference.
I doubt it is a fragmentation issue. Fragmentation is performed at the
IP layer, not at the ethernet layer. Some ethernet devices can perform
off-load segmentation (mostly for TCP), but cheap ones usually don't.
Beside, the lower the MTU, the most fragmentation rate you get : a
datagram does not need to be fragmented if its length is lower than the
MTU. I would rather think that the device (or its driver) just does not
handle big packets very well.
--
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
