Problem with NSA325V2 Ethernet link up/down (1 reply)

I just installed debian on my NSA325v2. Before that I have been using ArchLinux, but I wanted to use openmediavault.
Since a few weeks I noticed connection drops to the NAS. After looking at the dmesg log, there seems to be an error with the ethernet connection:

Quote
[ 977.263477] mv643xx_eth_port mv643xx_eth_port.0 eth0: link down
[ 977.269739] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled
[ 977.279665] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled
[ 1037.313328] mv643xx_eth_port mv643xx_eth_port.0 eth0: link down
[ 1037.319590] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled
[ 1037.329519] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled
[ 1097.113418] mv643xx_eth_port mv643xx_eth_port.0 eth0: link down
[ 1097.119401] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled

I had these problems with ArchLinux as well, but I wanted to see if debian could fix them. However, the errors are still there. I already tried to use a different cable and also a different switch, but that didn't help. Can this be hardware related? Or is it something with the kernel?