I have a 3400ME 12CS 4SFP Metro switch connected to a 7606 Cisco router via a dot1q trunk port. On the 3400's port facing the 7606 I receive valid but too small of frames (or undersized frames). The 7606 shows RCV-errs because of the Input queue show that it has dropped numerous packets. I have tried new x-over cables, different ports on both devices, and changing from forced 100, full duplex to auto negotiate. I am getting stumped, I have setups like this in other locations and have compared configs with clean ones and nothing seems to be out of sorts. Any suggestions?