Basis for OSPF protocol?

Distance Vector Routing

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ravi kiran m

  • May 28th, 2006


OSPF : open shortest path first

this ospf is used to send the packets of information as soon as possible to the destination, with out loss of packets.

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  • Jul 22nd, 2006

(a) OSPF has two primary characteristics. The first is that the protocol is open, which means that its specification is in the public domain. The OSPF specification is published as Request For Comments (RFC) 1247.

The second principal characteristic is that OSPF is based on the SPF algorithm, which sometimes is referred to as the Dijkstra algorithm, named for the person credited with its creation.

(b)OSPF is a link-state routing protocol that calls for the sending of link-state advertisements (LSAs) to all other routers within the same hierarchical area. Information on attached interfaces, metrics used, and other variables is included in OSPF LSAs. As OSPF routers accumulate link-state information, they use the SPF algorithm to calculate the shortest path to each node.

puneet chawla

  • Nov 4th, 2007

OSPF stands for Open shortest path first. It is a link state protocol which use hello protocol(default hello timer is 10 secs. & dead interval is 40 secs on multi access networks.)to make the neighbour adjacency's. maintains topology database & forwarding database. It converge very quickly.All the DBD info is passed b/w neighbour router after every 30 mins.It also supports VLSM , works on spf digithra algorithm to calculates it forwarding database.

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