W2k3 Server runs recreation application. Server connected to Netgear switch which is connected to entire Netgear switched environment using fiber connections. Every nite between 6:30 and 8:30pm, the users using the application experiencing a lockup or server error. Event viewer shows hanging application on client pc but the server has nothing indicating network drop. I think it may be a switch issue and was planning to reset the power on each switch that is connected. The enduser makes 3 hops to server.
I also have Arcserve running nightly backups around that time. That is the only scheduled event that I am aware of running.
Leads me to believe since it is a timed failure that it is the tape backup causing congestion and possible failure,
its a switch that coincidentally fails every night at the same time,
we have been infected by something and it is transmitting something out of network on the scheduled time.
What is the recommendation or starting point to solve an issue like this?