Posted on 2010-09-20
I have been having some intermittent network communication problems. We have a SBS 2003 and about 15 client computers running XP pro SP3. They are all connected to the same Gigabit switch, along with a neutopia router (dsl). Exchange is running, Outlook 2003 as the email client. A wireless access point is configured but the server provides dns and dhcp.
We have noticed that periodically the connection to the server is lost, and then is regained by not doing much of anything. Sometimes this only lasts for a short while. I have noticed on two particular computers, exactly every 5 min I receive the "Network cable has been unplugged" message. This occurs and there is no communication for literally one second, then reconnects. I even pinged the server when the message appeared, got back hardware error. One second later all is swell. The two computers this is happening on have a similar NIC. However all computers have experienced Network downtime for an extended period of time earlier this month and again days ago, which seemed to resolve itself for the time being....
I thought the error message I described was a local NIC at first, but now think it may be related to the network being unavailable for the extended period of time on those 2 occasions. As far as what the cause may be...Im grasping at straws...the Gigabit unmanaged switch? Server? Virus?