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Hi
my question is while adding a new switch to a network, is it necessery that
we have to careful about making the network reconverge,because the new switch has the lowest priority? if it has, would the whole network reconverge and find the best way to my new switch.
when you add a new switch STP recalculation happens in any case.
If the new switch has an higher bridge id then the current root bridge it will simply be accepted in a branch of current topology but recalculation has to occur even if it has a single uplink to the current infrastructure.
If the new switch has the lowest bridge id it will become the new root bridge (it can preeempt) and the new spanning tree will be drawn starting from it.
i hope you get solution.