Question about 3Com (3C17206TAA-US) 24x10/100 Mbps Networking Switch

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3COM 4400 has block my entire LAN ...

Hy.
I work in factory with over 20 switches 3COM 4400. Today sudenlly the entire network has frozen. After a couple of  hours we manage to solve the problem by extracting one of the switches from online state.
It was blocking the entire network. I didn't thought that was posible but I saw it with my own eyes.
I want if has happend in other cases and if it is possible to prevent some how this problem.
Thank you verry much.

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  • edwag Oct 27, 2007

    The broken switch was connecting by CAT6 coper wire (82 m measure by Fluke Network device) to the center of the network witch consist in 3 devices 3COM4400 connect in to a stack.
    About half of the other switches are connecting through fiber optic to a 3COM 4900SX witch itself connects to the center by fiber optic.

    Thank you :)

  • Mikkey Nov 13, 2007

    I have a stack of 4 X 4400, last week of October they went bananas. They would lock the network three times as day, somtimes more. I have finally pulled them out and we had a fine Weekend and Monday. So it's a switch problem. How do I find out which one is the faulty one?

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Please provide solution of Network is blocked

Posted on Nov 17, 2008

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Sounds like they are daisy chained together and this glicth locked the system.  How are the switches routed through your network.  Do you connect via T1 or Fiber?

Posted on Oct 27, 2007

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