This value will contain the name of the interface as reported by the
Unicast IP address of a next-hop router.
When this entry will no longer valid. For IPv6 this value
see For IPv6 RFC 2462 sections 4.2 and 6.3.4.
Value of this entry compared to others that this IP stack uses
when making selection to route traffic on the default
route when there are multiple default routers. Value must be one of
Properties inherited from DynamicData