The original Route Distinguisher (RD) of a VPN route. For VPN routes which are originated in a VRF or which are received from a CE the original RD is equal to the RD of the VRF. For VPN routes which are received from another PE and imported into a VRF, the original RD is the RD which was received from the other PE (the RD of the route itself is changed to the RD for the VRF when the route is imported into the VRF). For non-VPN routes the value of this object is undefined.