Managing a Switch Stack 145
Default Stacking Values
Stacking is always enabled on PowerConnect 7000 Series switches. 
NSF is enabled by default. You can disable NSF in order to redirect the CPU 
resources consumed by data checkpointing. Checkpointing only occurs when 
a backup unit is elected, so there is no need to disable the NSF feature on a 
standalone switch. When a new unit is added to the stack, the new unit takes 
the configuration of the stack, including the NSF setting.