OID value: 1.3.6.1.2.1.4.21.1.10
OID description:
ipRouteAge OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "The number of seconds since this route was last updated or otherwise determined to be correct. Note that no semantics of `too old' can be implied except through knowledge of the routing protocol by which the route was learned." ::= { ipRouteEntry 10 }
See also the OID Repository website reference for 1.3.6.1.2.1.4.21.1.10