most switches run auto speed/duplex these days.
Not all clients like that, or cannot do a proper handshake.

Standarized behaviour: If handshake does not succeed, go to 100 mbit/sec Half Duplex.

If the switch / router side thinks it is 100/full and the M600 defaults to 100/half (if it cannot do a good handshake) you have duplex mismatch.

This normally seems to work, unless you send larger files over the link and than the collission errors start to increase (on the unit that runs half duplex) and that sort of drops the link after there come too much errors.

Use network equipment that is manageble, then most likely you can configure the port manually. It costs more, but you can solve problems with it..

Last edited by Jaco; 2010-10-18 06:41.
Sold all M equipment