Editing Enhanced Interior Gateway Routing Protocol (section)

===Active and passive state===
A destination in the topology table can be marked either as ''passive'' or ''active''. A passive state is a state when the router has identified the successor(s) for the destination. The destination changes to ''active'' state when the current successor no longer satisfies the [[#Feasibility condition|feasibility condition]] and there are no feasible successors identified for that destination (i.e. no backup routes are available). The destination changes back from ''active'' to ''passive'' when the router received replies to all queries it has sent to its neighbors. Notice that if a successor stops satisfying the feasibility condition but there is at least one feasible successor available, the router will promote a feasible successor with the lowest total distance (the distance as reported by the feasible successor plus the cost of the link to this neighbor) to a new successor and the destination will remain in the ''passive'' state.