The value of vRtrInetStaticRouteStaticType specifies the
type of static route represented by this row entry. The values of
vRtrInetStaticRouteNextHopType, vRtrInetStaticRouteNextHop,
vRtrInetStaticRouteNextHopIf and vRtrInetStaticRouteNHTunnelName
depends on the value of vRtrInetStaticRouteStaticType.
For details please look at the following chart:
vRtrInetStaticRouteStaticType unknown nexthop indirect blackHole grt
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vRtrInetStaticRouteNextHopType unknown valid valid unknown unknown
vRtrInetStaticRouteNextHop null valid valid null null
vRtrInetStaticRouteNextHopIf null valid null null null
vRtrInetStaticRouteNHTunnelName null valid null null null
Though all the values of vRtrInetStaticRouteNextHop,
vRtrInetStaticRouteNextHopIf and vRtrInetStaticRouteNHTunnelName
can be valid when the value of vRtrInetStaticRouteStaticType is
'nexthop', please note that at most only one of them can have a non
null string.