This read-create integer (0 or 2-4094) reports the vNET tag assigned to a VRF instance, where zero means the VRF is not part of a vNET and may instead be used in a VRF-Lite or MPLS deployment. An admin cares because the tag groups multiple VRFs into a single virtual network overlay, and this value can be changed even while the VRF's row status is active, unlike many other VRF settings. For instance, setting this object to zero on a VRF removes it from vNET 150 without needing to first deactivate the VRF row.