OID value: 1.3.6.1.2.1.4.21.1.9
OID description:
ipRouteProto OBJECT-TYPE SYNTAX INTEGER { other(1), local(2), netmgmt(3), icmp(4), egp(5), ggp(6), hello(7), rip(8), is-is(9), es-is(10), ciscoIgrp(11), bbnSpfIgp(12), ospf(13), bgp(14) } ACCESS read-only STATUS mandatory DESCRIPTION "The routing mechanism via which this route was learned. Inclusion of values for gateway routing protocols is not intended to imply that hosts should support those protocols." ::= { ipRouteEntry 9 }
See also the OID Repository website reference for 1.3.6.1.2.1.4.21.1.9