esaProbeInner2VlanId is a read-write VlanId specifying the monitored service's Inner2 VLAN tag value, taking effect only when esaProbeInner2VlanTagEnabled is true; it is not applicable to Y.1731 probes. An administrator sets this to the exact inner VLAN ID the customer's service actually uses, so the probe's frames are classified and forwarded through the same VLAN-based path as real traffic. For example, entering the wrong Inner2 VLAN ID here would send test frames down a different inner VLAN than the customer's real traffic, making the SLA test meaningless even though it appears to run normally.