Network consists of WinNT, Win200 servers/workstations. Foundry Networks 10/100 switches/routers. All client PC's are IBM Thinkpads(mixed models) with a Xircom 10/100 PCMCIA card. Intermittant problem with network drops. On Win200 pc's the little dialogue box pops up in the lower right hand corner "Local Area
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Your question was not complete, but you will need to check your hardware. Check your patch cables, network drops, connector jacks, and your hub and switch. I have seen a flaky hub or switch cause numerous and intermittent network problems. Change ports, change the hub, change patch cables, etc.
Seems as though you have isolated the problem yourself i.e. pcmcia cards. We have a number of users with laptops, and I,d say a majority of them havent got a clue as to how fragile they are (depending on what type). Users put their laptop on their desk then pile paperwork and books on the lan cable, or pull on it etc. Then think you've performed magic when you give the cable some slack or reboot.Not trying to slam users, its not their job, they just need a little education. One other thing, if you have recently gone from 10mbp to 100, you might have to either replace your patch cables, or crimp new connectors on exsisting cables. It has to do with the resistence(?) of the old connection and the faster 100mbp.
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Network Drops