Unstable Network Connection To Milestone Server?

I started noticing that I was loosing connection to one of my servers this morning.

It looked like the ACK packages weren't coming in on my TCP packages. So I went and login on the server to see what the status was to find the following network load:

Anyone have a suggestion on what it might be ?

It's a slave server in a Milestone Enterprise setup. It's storing it's archive (older then 1 day) on a NAS.

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