Re: Qnap / mv643xx_eth link dropping

[Thomas Pircher <tehpeh-debian@tty1.net>]

On 2016-01-21 13:18, JM wrote:
> I recently upgraded my LAN to 1Gbps and noticed that file transfers
> from my NAS would be interrupted.

I had problems with TCP offloading on my Qnap TS-420, which also uses 
the mv643xx driver. But that would only disconnect a TCP connection, and 
as far as I can remember didn't reset the ethernet link.

Still it might be worth to try disabling TCP offloading in 
/etc/network/interfaces:

auto eth0
iface eth0 inet dhcp
       offload-rx off           # disables TCP RX offloading
       offload-tx off           # disables TCP TX offloading


Thomas