The Complete IS-IS Routing Protocol

1. Front Matter

   Pages i-xvii

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2. Introduction, Motivation and Historical Background

   Pages 1-9

3. Router Architecture

   Pages 11-34

4. Introduction to the IOS and JUNOS Command Line Interface

   Pages 35-78

5. IS-IS Basics

   Pages 79-108

6. Neighbour Discovery and Handshaking

   Pages 109-140

7. Generating, Flooding and Ageing LSPs

   Pages 141-182

8. Pseudonodes and Designated Routers

   Pages 183-204

9. Synchronizing Databases

   Pages 205-222

10. Fragmentation

    Pages 223-245

11. SPF and Route Calculation

    Pages 247-279

12. TLVs and Sub-TLVs

    Pages 281-299

13. IP Reachability Information

    Pages 301-344

14. IS-IS Extensions

    Pages 345-391

15. Traffic Engineering and MPLS

    Pages 393-437

16. Troubleshooting

    Pages 439-474

17. Network Design

    Pages 475-502

18. Future of IS-IS

    Pages 503-525

19. Back Matter

    Pages 527-540

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IS-IS has always been my favourite Interior Gateway Protocol. Its elegant simplicity, its well-structured data formats, its ?exibility and easy extensibility are all appealing – IS-IS epitomizes link-state routing. Whether for this reason or others, IS-IS is the IGP of choice in some of the world’s largest networks. Thus, if one is at all interested in routing, it is well worth the time and effort to learn IS-IS. However, it is hazardous to call any routing protocol “simple”. Every design decision, be it in architecture, implementation or deployment, has consequences, some unanti- pated, some unknowable, some dire. Interactions between different implementations, the dynamic nature of routing, and new protocol features all contribute to making routing protocols complex to design, write and deploy effectively in networks. For example, IS-IS started as a link-state routing protocol for ISO networks. It has since evolved sign- cantly: IS-IS has IPv4 and IPv6 (and IPX) addressing; IS-IS can carry information about multiple topologies; link attributes have expanded to include traf?c engineering para- ters; a new methodology for restarting IS-IS gracefully has been developed. IS-IS even has extensions for use in “non-packet networks”, such as SONET and optical networks, as part of the Generalized Multi-Protocol Label Switching (G-MPLS) protocol suite. Understanding all of what IS-IS offers and keeping abreast of the newer protocol f- tures is a weighty endeavour, but one that is absolutely essential for all serious netwo- ing engineers, whether they are developing code or running networks.

• Cisco
• Communication Systems
• Interface
• Internet Protocol (IP)
• Long-Term-Evolution
• Multiprotocol Label Switching
• Network programming
• Network technologies
• Router
• Systems Architecture
• Troubleshooting
• architecture

From the reviews of the first edition:

"The book presents a wide range of problems concerning operation of the IS-IS routing protocol based on ISO-OSI standards, and belonging to the class of dynamic Interior Gateway and link-state routing protocols. … the material presented in the book is well organized. … the book can be undoubtedly very useful for all networking specialists." (Jozef Wozniak, Zentralblatt MATH, Vol. 1070, 2005)

• Schwaz, Austria

  Hannes Gredler

• Phoenix, USA

  Walter Goralski

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