Intradomain Routing: OSPF

In this lesson we'll study the OSPF protocol.

Intradomain Routing

Intradomain routing protocols have two objectives:

  1. They distribute routing information that corresponds to the shortest path between two routers in the domain.
  2. They should allow the routers to quickly recover from link and router failures.

OSPF

Open Shortest Path First (OSPF), defined in RFC 2328, is one of the link-state routing protocols that has been standardized by the IETF.

Hierarchical Routing

A domain can consist of thousands of routers. In such a large network, exchanging link-state information, building a global view of the network, and efficiently handling changes in the network becomes unscalable. ...