Why is it divided into areas in OSPF network?

Created Mar 04, 2016 20:58:45Latest reply Mar 05, 2016 02:23:09 1137 1 0 0
 Why is it divided into areas in OSPF network?
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Osaideo     Created Mar 05, 2016 02:23:09 Helpful(0) Helpful(0)

OSPF LSDB is very big in a large network and also takes up a lot of storage space. OSPF is link-state protocol, so the LSDB include not only route information. After the division of areas, the numbers of LSA will be greatly reduced.
Link-state algorithm is more complex than distance vector algorithm. SFP calculation will cost more time and CPU resource.
After the division of the area, it use link-state algorithms within region and use the distance vector algorithm between regions.
Network topology changes frequently in large network, which will make the network to be in the turbulence. The oscillation can be limited in one area by ABR after the network topology changed.
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