Internet Routing Architectures, Second Edition

Chapter 8. Controlling Routing Inside the Autonomous System

This chapter covers the following key topics:

• Interaction of non-BGP routers with BGP routers— A brief overview of the methods by which non-BGP routers inside an AS can reach the outside world.

• Defaults inside the AS: primary/backup policy— Different methods by which to avoid potential loops when default routing inside an AS conflicts with the goal of providing a primary and a backup link to outside the AS.

• Defaults inside the AS: other BGP policies— An overview of routing policies other than primary/backup, which can lead to routing loops within the AS.

• Policy routing— A definition and sample of a method of controlling routes, based on traffic source IP addresses or source ...