This holds the relative name (Rn) — the single last path segment of the Dn above — for this IPv6IfAddrFsm FSM record, identifying it within its immediate parent object rather than the whole tree. For an IPv6 address bound to a UCS Manager or CIMC management interface, the Rn is what distinguishes the FSM child object from that object's other children (its config, its stats, its fault list) when UCS Manager walks the parent's subtree. In practice this returns the literal string 'fsm', since each parent object carries exactly one FSM child.