When running the show routing route command or when the virtual router runtime stats are viewed, a set of flags are displayed next to each route.
Routes that start with A are active
AS - Active and static
AR - Active and learned via RIP
S - Not active due to a higher metric and static
AC - Active and a result of an internal interface (connected) - Destination = network
AH - Active and a result of an internal interface (connected) - Denstinaion = Host only
A?B - Active and learned via BGP
O1 - OSPF external type-1
O2 - OSPF external type-2
Oi - OSPF intra-area
Oo - OSPF inter-area