esaProbeInner2VlanPrio is a read-write VlanPriority specifying the monitored service's Inner2 VLAN priority bits, taking effect only when esaProbeInner2VlanTagEnabled is true; it is not applicable to Y.1731 probes. An administrator sets this so the probe's test frames receive the same queuing/priority treatment across the network as the customer's real inner-tagged traffic. For example, setting this priority to match a voice service's inner VLAN priority ensures the probe experiences the same low-latency queue as real voice traffic, rather than being tested against a lower-priority queue that would give an overly pessimistic delay reading.