PROBLEM: (83662, 83714) (PATCH ID: OSF510-125)
********
The receiver on the DE60x will hang.  Packets can be sent from the
interface but are never received.  "netstat -s -i" will typically show
a high number of data overruns for the affected interface.  Running
"ifconfig down" followed by "ifconfig up" will restart the receiver,
as will rebooting.
lan_config behavior was not as expected with previous versions of the
DE60x driver.  There are two options to lan_config, -s (speed) and -x
(mode).  "lan_config -s100" would revert the mode to half-duplex,
since "-x" was omitted.  Conversely, "lan_config -x1" would revert the
speed to 10, since "-s" was omitted.  A workaround is to always
specify "-s" and "-x" on the lan_config command-line.