I have one network with - / +50 computer.
Lan and last days, has Apparent fail. Don't make any change the network.
Apparent fail moments by the network, and does not understand why.
That is there any software can analyze the network failures.
Some troubleshooting I've done: Changed the switch for better (3com); Passed-the new cable to the router.
edit: Example: I'm doing ping to our internal server, "requests timed out" The share folder takes long to open file (due to network outages) We lost our connection to the internal webserver.
But only in a specific network part in the other half of all network works to 100%