OSPF Link state or Hybrid Protocol

[Sharanjeet_Kumar]

Hi all,

From the first day i know that OSPF is a Link State routing protocol.

But, few days ago, one of my senior colleague told me that OSPF is a hybrid protocol.

and his logic for it was: within an area OSPF works as a link state routing protocol and outside the area it works as a distance vector routing protocol.

can anyone provide me some documents so that i can prove him that OSPF is a link state routing protocol not a hybrid protocol??

any help is appreciated.....

thanks in advance!!!!!

[MHM Cisco World · Accepted solution]

Q: How does OSPF prevent routing loops when exchanging summary LSAs?
A: In OSPF, the backbone area is used for exchanging inter-area routes between
all other areas. Since there is no common topology shared among different
areas, loop prevention should be based on distance-vector principles.

https://cdn2.hubspot.net/hubfs/3985396/Blog/Loop-Prevention-in-OSPF.pdf