Network connection problem

I would try what sam says above and also what is the setting on the NIC, full duplex, auto, etc.?  Have you tried forcing it to 100 full on both the server and switch?
Also, try swapping the cable, that is an easy thing to try.
anything in the event logs?

Hi samccarthy, what could be the cause of the flakey NIC ?

Hi thepunish3r, can you explain more usage of the NIC setting, I need some background understanding before turning them, thanks.

A flakey NIC or Switch port could be caused by heat, cold solder joints, cheap components, power surge or a surge over the Ethernet cabling.  To isolate, you will either have to prove, or disprove what could be the cause.  What Punish is talking about is the actual connection settings of the Nic itself.  Some Switches can be picky about the Auto Setting which is the default on most everything now a days.  Cisco switches seem to be particularly tempermental about this.  If you do this, then you must make the same setting changes on each end.  So if you statically set your NIC to 100 and Full duplex, then you must do the same to the particular port on the switch it is attached to.  It's a good check.  Depending on your switch though, you may not be able to set it there.

cleungsg,

I suggest that you try what they have suggested, if in any case, the problem still persists, then try updating your NIC driver. Also, I notice that you're in SP2, it is possible that this is the cause. Some machines in your network might have been affected by a worm/virus that are broadcasting packets and is affecfting your DC. I suggest that you update your DC to SP4 and install the latest critical updates.

Hope this helps

Lapukman