How to detect a network loop thats messing up my network!?

hello..


i've recently came up with a prob where my entire network goes nuts and internet connectivity stops for a few seconds like 10 or so..


browsing connectivity/pinging is the same (a bit lagging) but msn/yahoo/skype/mirc/sip goes down and doesnt get back up till after a minute or so..


i have no idea what might be the cause of this even though i suspect a flawed network cable plkugged in somewhere thts forming a broadcast every period of time..


but i dont have any idea of how to detect it or how to know where its originating from!


could any1 help plz! its crucial!
How to detect a network loop thats messing up my network!?
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How to detect a network loop thats messing up my network!?
Insufficient information





are you using switches? Is spanning tree setup?





Are they Cisco? if so do you have CDP enabled. That would tell you what switches are connected, then you compare that to your diagram.








How big is your network? tracert may not help if you are a small layer 2 network.
Reply:The most obvious (if it is only your notebook) is to remove that network from your adapter. Beyond this, it is a tough one. Are you using Cisco? Is it only your node effected or is it effecting part of your hybrid network? Netstat could be used to run details about the TCP/IP components and connections on a host. It will provide you a quick way to view traffic statistics without having to run a more complex traffic analysis program such as Ethereal. You can also run traceroute (Tracert). It uses ICMP to trace the path from one network node to another and identifies all the intermediate hops between the two nodes. This is all I can think of other that removing all the crossover and straight Ethernet RJ-45 cables and using a continuity cable tester (what an exhausting job).