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jskfanFlag for Cyprus

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importance of the cost in root switch election

I would like to know when the cost of the link comes into consideration in the root switch election.
If I understand the elements of root switch election are:

-priority
-mac address

we can have a tie in priority but never with mac address.
so what  about the cost? is it an element that considered in the root bridge election?

thanks

Thanks
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SeeMeShakinMyHead

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SeeMeShakinMyHead

not primary, root bridge that is.
Also, I prefer to set the priorities statically (in increments of 4096 from 0 being root).  I like to control the elections and since an election will never be 0, I can control the root).
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ASKER

switch A = Root ---

Switch B mac=bbbb-bbbb-bbbb
Switch C mac=cccc-cccc-cccc

priority of B and C is the same.

in this case the link going from C to B is the blocked----if the link cost is all the same.

what if the link cost going from B to C to A is lower than the cost from B to A

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thanks