Setting this object to enabled turns on smart isolation switch-wide, which specifically prevents isolated ports located on different switches from communicating with each other, extending basic port isolation across a stack or multiple switches. An administrator enables this in a multi-switch deployment where isolated ports on different physical units still need to be kept from talking to one another. For example, enabling zyPortIsolationSmartIsolationState ensures an isolated port on switch A in a stack still can't reach an isolated port on switch B, closing a gap that basic single-switch port isolation wouldn't cover.