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Network devices losing connection

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by cbacon

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We are running a Windows Server 2003 environment with 7 servers running on Cisco 3750 switches. We have been having problems with some of our network devices losing their network connectivity intermittently, not the same building or switch. They seem to go down within seconds of each other and reconnect at the same time. We have run IP ping logs and are unable to locate the problem. The servers do not lose connectivity and not all devices are experiencing this problem. The devices that are noticing this problem are those with static ips.

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by zaferus

An interesting problem.

Mirror the traffic from two of these servers (in different buildings) to 2 other systems. On these 2 systems do packet captures (say in 5 MB chunks) and the next time you lose connectivity see what traffic is going on at the exact moment they both lost connectivity and re-established.

I'm guessing this will give you a good clue as to what is going on at these times.

by matthew yurksaitis

Which devices are experiencing the problems? the Win2003 Servers or the CISCO 3750's or a combination of both? - I ask because the symptoms sound like a duplicate IP address conflict or perhaps a duplicate route, but without more info it is difficult to determine.

by matthew yurksaitis

Which devices are experiencing the problems? the Win2003 Servers or the CISCO 3750's or a combination of both? - I ask because the symptoms sound like a duplicate IP address conflict or perhaps a duplicate route, but without more info it is difficult to determine.

by deadcoconuts

We also have Cisco 3750 switch with 2003 server and are having random network disconnects just curious if any way resolved this issue or identified what the source of the problem was.

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