This SnmpAdminString field carries the specific error text explaining why the last attempt to push configuration for this FC monitoring session to the hardware failed. For an FC SPAN-style traffic-monitoring session that copies frames from a source port or VSAN to a designated analyzer port, this is the field an admin actually reads after seeing isConfigSuccess flip to false, since the fault itself may only summarize 'configuration failed' while this text names the concrete reason (for example, a destination port already in use by another session). A typical value might read something like 'destination port already assigned to another session', pointing the admin straight at the conflicting session instead of leaving them to guess.