This string is a human-readable description of the finite-state-machine workflow currently or most recently running against this internal backplane link. It matters on the internal Ethernet link that carries a blade's traffic from the chassis I/O Module up to a Fabric Interconnect over the backplane because it is the plain-text explanation an admin reads in the UCS Manager GUI, e.g. 'Discovering chassis connection,' instead of decoding an FSM state code. A fsmDescr reading 'Waiting for port to come up' persisting for many minutes on this backplane link tells an admin the link bring-up workflow is stuck, not merely slow.