can i do it a stacking between this switches?
what is the consecuences?
insharie is correct, you basically need to have the same IOS package in order to stack. Are these for your existing 3750-X switches, by the way?
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If same IOS version, my understanding is you can mix IPBase and IPServices within a stack of 3750Xs. (LanBase won't stack with other than LanBase, I believe.)
To obtain the benefit of the IPServices, that stack member will need to be the stack master.