Routing Dynamics: Communication and Convergence

This chapter explores the mechanics of how routers communicate changes in routing information, emphasizing the speed and efficiency of updates. It delves into the role of routing protocols like OSPF and BGP in establishing and maintaining neighbor relationships, including the use of hello messages and keep-alive mechanisms. The discussion also highlights advanced technologies such as Bi-directional Forwarding Detection (BFD) that enhance notification speed, ensuring rapid network convergence during topology changes.