Peculiar networking issue

[John007]

Hi

Two dell servers; Windows Server 2016 Standard DC and Windows Server 2012 R2 Standard member server.

We have a peculiar networking issue. We started getting network connection issues. This happens for a few seconds and at no particular interval but let's say once every one to two hours.

Here is what we noticed;

On member server the RWW connection will break for a few seconds and then restored.
However we also get MS Access database crashes which complains that network connection was lost and to restart db to continue. The MS Access database was running from a shared folder on the DC. We moved the db to a shared folder on the member server but MS Access database still crashed.

We moved both DC and member servers to a different switch. No luck. We reinstalled Windows Server 2016 standard on DC and moved back MS Access database to a shared folder on DC but still no luck and MS Access database still crashes.

Could all this be due to DC hardware networking issues such as faulty network card or network cabling connecting DC to switch? At this point I am considering changing both DC's network card and cable.

Is there something someone can suggest to home in on this issue?

Thanks

Regards

[icecream-guy]

check the server logs.
check error counts on switch port.

[deanwebb]

check the server logs.
check error counts on switch port.

I'm leaning in the direction of a faulty card or port or cable, but the logs and error counts will give a fuller story - especially when we look at which side of the conversation is the last to be registered. That can tell us the direction of the fault and its likely location.

Also, are there interruptions in other network communications that don't result in a big reset like with the DB, but still show up in the logs as having timeouts or renegotiations?