This read-write object points to protocol-specific MIB definitions relevant to the routing protocol responsible for this route, as identified by zhIpCidrRouteProto, defaulting to the null OID 0 0 when no such reference applies. Admins or management tools use it to locate additional protocol-specific details about a route, such as an OSPF-specific or BGP-specific object, beyond what this generic CIDR route table provides. A zhIpCidrRouteInfo value pointing into the BGP MIB would let the admin drill down for additional BGP-specific attributes of a route learned via that protocol, rather than the 0 0 default seen on routes without such extended information.