This read-write TruthValue object controls whether the device generates SNMP notifications when a vNET trunk interface's status changes. An administrator turns this on to be proactively alerted when a vNET trunking link goes up or down, since that link may be carrying traffic for many VRFs at once. For example, enabling this ensures that if a vNET trunk uplink between two switches fails, a notification fires immediately instead of being discovered only when downstream VRFs lose reachability.