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 current successor no longer satisfies the 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 remains in the Passive state.
Read more about this topic: Enhanced Interior Gateway Routing Protocol
Famous quotes containing the words active, passive and/or state:
“Many writers who choose to be active in the world lose not virtue but time, and that stillness without which literature cannot be made.”
—Gore Vidal (b. 1925)
“...if you are to gain any great amount of good from the world, you must attain a passive condition of mind. ...it is never to be forgotten that it is the rest of the world and not you that holds the great share of the world’s wealth, and that you must allow yourself to be acted upon by the world, if you would become a sharer in the gain of all the ages to your own infinite advantage.”
—Anna C. Brackett (1836–1911)
“President Lowell of Harvard appealed to students ‘to prepare themselves for such services as the Governor may call upon them to render.’ Dean Greenough organized an ‘emergency committee,’ and Coach Fisher was reported by the press as having declared, ‘To hell with football if men are needed.’”
—For the State of Massachusetts, U.S. public relief program (1935-1943)