This is the relative name distinguishing this finite-state-machine record from its sibling objects under the same parent link. It matters on the finite-state-machine record UCS Manager runs while it discovers, acknowledges, or brings up that internal server-side backplane link because it is the fixed short suffix ('fsm') that identifies this as the workflow-tracking child object rather than the link object itself. An rn of 'fsm' on this link is what an admin would expect regardless of which specific link it's attached to, since only the parent DN varies between links.