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Scaling OSPF and IS-IS

This chapter from OSPF and IS-IS: Choosing an IGP for Large-Scale Networks delves into features and extensions that can increase the scalability of OSPF and IS-IS.

Scalable may well be one of the most overused words in the network designer's lexicon. It applies to protocols, to software, to operating systems, to hardware architecture, and to networks. Scalable means, simply enough, the ability of the relevant entity (select one from the list just given) to get much bigger than it presently is without reducing performance, stability, or accuracy; making your customers angry; or getting you fired. This chapter covers scalability in OSPF and IS-IS, including sections on:

  • SPF enhancements
  • Fragmentation, and
  • Overloading.

Read the rest of Chapter 8 in this PDF: Scaling

Excerpted from OSPF and IS-IS: Choosing an IGP for Large-Scale Networks by Jeff Doyle. (ISBN: 0-321-16879-8).
Copyright © 2007, Pearson Education. All rights reserved.

This was first published in June 2007

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