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6200yl-24G-mGBIC Freezes up new fiber-optic network

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  • 1.  6200yl-24G-mGBIC Freezes up new fiber-optic network

    Posted Oct 01, 2010 07:03 AM
    I have a 6200yl-24G-mGBIC switch connected to 8 Procurve 1810G-24 switches via new 50ohm fiber-optic lines. When I power up the 6200yl switch I get steady green leds on all the ports, and a very rapid activity light on the 1810G-24 switches. However nothing can communicate across the network, I can't even ping from a server to the firewall which are both in the rack on the same switch, and it takes workstation about 4 times longer to log in, but when they do they don't see the domain. All the switches are still on factory settings, I have been using the 1810G-24 switches for almost a year on an old ethernet "daisy chained" network, but this is the first that I'm powering up the fiber. Anyone have any ideas what the problem is?


  • 2.  RE: 6200yl-24G-mGBIC Freezes up new fiber-optic network

    Posted Oct 04, 2010 05:43 AM
    I assume the 1810's are allready interconnected before installation of the 6200?

    by default spannig-tree is disabled.
    So you create loops in your network when powering up the 6200.

    -> disconnect all 1810's before powering up the 6200.
    - then connect a single 1810 using a single Fibre (pair).
    - see network behaviour (probably all normal)
    - connect a second 1810
    -> now the netweork will go bezerk again
    => spanning-tree problem configred
    (disconnect again)

    ==>> either enable and configure spanning-tree.
    or disconnect the old 1810's uplink before connecting to the 6200.