Bug#719433: r8169: Enabling jumbo frames (and setting 9K MTU locally) seems to workaround issue

[Daniel Dickinson <daniel@cshore.neomailbox.net>]

Because of the reassembled fragments I decided to try an experiments.  I
enabled Jumbo frames on the other side (the Windows 8) machine's driver
(an r8168 incidentally) and set the MTU to 9000 on the local host.  So
far this fixes the issues with the Windows 8 hosts. I am not sure of the
effects on my other hosts though (e.g. ones with no jumbo frame support)).

It looks suspiciously like a jumbo frame support issue (mtu in OS not
honoured or oversized frames due to driver bug?).

Regards,

Daniel