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loopback-detection shutdown enable

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  • 1.  loopback-detection shutdown enable

    Posted Oct 07, 2009 10:09 AM
    Hi guys,

    I have "Switch 4200G 24-Port Software Version 3Com OS V3.02.02s56". I simulated loopback ( port 7 is connected to looped unmanaged switch) . Log from switch:



    #Apr 2 00:24:01:233 2000 3com-mr-bl402 DRV/5/LOOPBACKED:- 1 - Trap 1.3.6.1.4.1.43.45.1.10.2.95.1.0.3(h3cLpbkdtTrapPerVlanLoopbacked): Loopback exists on the interface 4227193 GigabitEthernet1/0/7 in VLAN 1.

    %Apr 2 00:24:01:495 2000 3com-mr-bl402 DRV/5/LOOPBACK:- 1 -



    Loopback does exist on port 7 vlan 1, please check it".

    But the port is up and running - only warning. I want port to shutdown, but the command "loopback-detection shutdown enable" is missing.

    And also another problem:

    if STP is enabled, switch dosn't detect loopback on port 7,

    if STP is disabled switch detects loopback.







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