OK... I have a crosscable.
and unstable connection, take a look:
[2014-12-09 20:49:45] TFTP server[192.0.0.128] initialized
[2014-12-09 20:51:08] TFTP server[192.0.0.128] initialized
[2014-12-09 20:52:08] Device[192.0.0.64] test tftpserver
[2014-12-09 20:52:52] Connect client failure,0...