This locale-typed field classifies this FC monitoring session's SAN scope as either an 'internal' construct (built and managed automatically by UCS Manager) or an 'external' one exposed for direct admin configuration. For the record tying an FC monitoring session to a specific SAN cloud (a Fabric A or Fabric B FC uplink domain) whose traffic is eligible to be captured, 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.