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How to find a loop on a network using WireShark?

Anonymous user -  
phil2k Posted messages 10841 Registration date   Status Contributor Last intervention   -
Hello, as the name suggests, I would like to find a loop on a network. The problem is that I can't figure out which switch is causing a loop and I can't find the solution to the problem using WireShark.

If someone could help me, I'm a bit stuck.

Configuration: Windows XP / Chrome 43.0.2357.130

1 answer

  1.
    phil2k Posted messages 10841 Registration date   Status Contributor Last intervention   2 339
     
    Hello

    Is it a permanent loop?
    On a local network?
    If so, it must be on its knees....

    Wireshark doesn't seem suitable to find it..

    How do you know there is a loop?

    --
    "To fix something that doesn't work or makes too much noise, it is enough to hit it with something that works better or makes more noise" The Shadoks
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    1. Anonymous user
       
      The LOOP and STP protocols are used.

      Indeed, on the local network, and that's why I would like to find the source of this loop.

      If WireShark is not suitable, what could be the most appropriate software for this kind of situation?

      For clarification, I am in a high school with several patch panels, which is why the server manages to maintain a certain stability despite the loop, but it has already crashed.
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    2. phil2k Posted messages 10841 Registration date   Status Contributor Last intervention   2 339 > Anonymous user
       
      If STP is used, there should not be any loop ...
      Review the switch configuration .....

      --
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    3. Lord_Onance Posted messages 65 Status Member 10 > phil2k Posted messages 10841 Registration date   Status Contributor Last intervention  
       
      I confirm the statements of phil2k, the STP protocol prevents loops, so focus more on the configuration of your switches.
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    4. Anonymous user
       
      The configuration of the switches is good, but with over 200 PCs, the network still crashes.
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    5. phil2k Posted messages 10841 Registration date   Status Contributor Last intervention   2 339
       
      Maybe the network is exploding, but that doesn't necessarily mean there's a loop...
      We may need to re-examine the traffic, the structure of the network...
      0