This is UCS Manager's internal numeric database identifier for this Chassis Connectivity Policy object, distinct from the human-assigned name, used internally by the UCSM software to track the object across the MIT rather than for admin-facing lookups. An admin would rarely reference this directly, but it becomes useful when correlating a UCSM fault or audit-log entry that cites an internal object ID back to a specific policy. A sample value looks like a numeric string such as '4373729'.