Internet Routing Architectures, Second Edition

Chapter 10. Designing Stable Internets

This chapter covers the following key topics:

• Route instabilities on the Internet— Briefly examines the most common causes of route instability.

• Controlling route and cache invalidation— Cisco offers a soft configuration feature that enables administrators to reconfigure attributes on the fly with minimal repercussions for routes and cache.

• BGP route refresh— Border Gateway Protocol (BGP) route refresh provides a mechanism to apply new policies by requesting a fresh set of routes from a peer without having to reset the BGP connection or flap the route announcements.

• Route dampening— BGP's route dampening feature identifies and suppresses unstable routes for better reliability within and outside ...