OID value: 1.3.6.1.2.1.4.21.1.6
OID description:
ipRouteMetric4 OBJECT-TYPE SYNTAX INTEGER ACCESS read-write STATUS mandatory DESCRIPTION "An alternate routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1." ::= { ipRouteEntry 6 }
See also the OID Repository website reference for 1.3.6.1.2.1.4.21.1.6