This locale-typed field classifies this FC monitoring session as either an 'internal' construct (built and managed automatically by UCS Manager) or an 'external' one exposed for direct admin configuration. For an FC SPAN-style traffic-monitoring session that copies frames from a source port or VSAN to a designated analyzer port, this distinction matters because internal locale objects are recreated automatically if deleted, while external ones represent an admin's own uplink/storage configuration and will not silently reappear if removed. Most hand-configured instances like this one report 'external', since they correspond to physical uplinks or storage connections an admin wired up rather than auto-generated internal plumbing.