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Spanning-Tree

Discussion in 'Routing & Switching' started by dv-ant, Apr 19, 2010.

  1. dv-ant

    dv-ant Bit Poster

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    is there a maximum number of switches, or effective-radius, in which spanning-tree can work effectively ?

    and exceeding that number would cause spanning-tree to buckle under the strain and tiiimmmmmbbbbbbbbbbbeeeeeeerrrrrrrrrrrrrrr
    and then the dreaded broadcast storm crashes your network ??
     
  2. cisco lab rat

    cisco lab rat Megabyte Poster

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    In IEEE 802.1D the radius should be default not exceed more than 7 switches

    In IEEE 802.1W the radius should not exceed more than 20.

    I have tried to exceed both with interesting results.

    The problem with exceeding the recommend radius is not fear of the broadcast storm but convergence issues in electing the root bridge, this will stop any user traffic rather than propagate it in a loop
     
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  3. dv-ant

    dv-ant Bit Poster

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    thats exactly what I was after - excellent stuff

    thanks Joe :thumbleft
     

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