This timestamp records when the FSM state currently reported for the physical-port object that tracks a fabric-interconnect port's configuration mode and the progress of its own discovery workflow was last updated. An administrator uses fsmStamp to judge whether the FSM information being displayed for this Phys instance is fresh or stale, which matters when deciding whether a stuck-looking workflow is truly stuck. For example, an fsmStamp that has not advanced in many minutes while fsmStatus still shows 'in progress' is a strong signal that this Phys's workflow has actually hung.