Ebook: The Complete IS-IS Routing Protocol

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.

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The IS-IS routing protocol has gone through a high-speed evolution in recent years. Today, it is a widely deployed protocol even at smaller ISPs but because of its quick ascent it has been sparsely documented and seldom understood. As service providers add multivendor platforms from both Cisco and Juniper Networks, it is increasingly difficult to get a complete picture of the IS-IS that is actually deployed in the field. Only a book such as The Complete IS-IS Routing Protocol can provide the insight and practical solutions needed because it takes a multivendor, real-world competitive approach to implement IS-IS. The Complete IS-IS Routing Protocol is written by one of the leading authorities on IS-IS routing, Hannes Gredler, who specializes in IS-IS solutions for Juniper Networks in Europe. Hannes’ co-author is the networking book veteran, Walter Goralski, whose name attracts readers across the world for his frank, lucid prose.

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The IS-IS routing protocol has gone through a high-speed evolution in recent years. Today, it is a widely deployed protocol even at smaller ISPs but because of its quick ascent it has been sparsely documented and seldom understood. As service providers add multivendor platforms from both Cisco and Juniper Networks, it is increasingly difficult to get a complete picture of the IS-IS that is actually deployed in the field. Only a book such as The Complete IS-IS Routing Protocol can provide the insight and practical solutions needed because it takes a multivendor, real-world competitive approach to implement IS-IS. The Complete IS-IS Routing Protocol is written by one of the leading authorities on IS-IS routing, Hannes Gredler, who specializes in IS-IS solutions for Juniper Networks in Europe. Hannes’ co-author is the networking book veteran, Walter Goralski, whose name attracts readers across the world for his frank, lucid prose.
Content:
Front Matter....Pages i-xvii
Introduction, Motivation and Historical Background....Pages 1-9
Router Architecture....Pages 11-34
Introduction to the IOS and JUNOS Command Line Interface....Pages 35-78
IS-IS Basics....Pages 79-108
Neighbour Discovery and Handshaking....Pages 109-140
Generating, Flooding and Ageing LSPs....Pages 141-182
Pseudonodes and Designated Routers....Pages 183-204
Synchronizing Databases....Pages 205-222
Fragmentation....Pages 223-245
SPF and Route Calculation....Pages 247-279
TLVs and Sub-TLVs....Pages 281-299
IP Reachability Information....Pages 301-344
IS-IS Extensions....Pages 345-391
Traffic Engineering and MPLS....Pages 393-437
Troubleshooting....Pages 439-474
Network Design....Pages 475-502
Future of IS-IS....Pages 503-525
Back Matter....Pages 527-540

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The IS-IS routing protocol has gone through a high-speed evolution in recent years. Today, it is a widely deployed protocol even at smaller ISPs but because of its quick ascent it has been sparsely documented and seldom understood. As service providers add multivendor platforms from both Cisco and Juniper Networks, it is increasingly difficult to get a complete picture of the IS-IS that is actually deployed in the field. Only a book such as The Complete IS-IS Routing Protocol can provide the insight and practical solutions needed because it takes a multivendor, real-world competitive approach to implement IS-IS. The Complete IS-IS Routing Protocol is written by one of the leading authorities on IS-IS routing, Hannes Gredler, who specializes in IS-IS solutions for Juniper Networks in Europe. Hannes’ co-author is the networking book veteran, Walter Goralski, whose name attracts readers across the world for his frank, lucid prose.
Content:
Front Matter....Pages i-xvii
Introduction, Motivation and Historical Background....Pages 1-9
Router Architecture....Pages 11-34
Introduction to the IOS and JUNOS Command Line Interface....Pages 35-78
IS-IS Basics....Pages 79-108
Neighbour Discovery and Handshaking....Pages 109-140
Generating, Flooding and Ageing LSPs....Pages 141-182
Pseudonodes and Designated Routers....Pages 183-204
Synchronizing Databases....Pages 205-222
Fragmentation....Pages 223-245
SPF and Route Calculation....Pages 247-279
TLVs and Sub-TLVs....Pages 281-299
IP Reachability Information....Pages 301-344
IS-IS Extensions....Pages 345-391
Traffic Engineering and MPLS....Pages 393-437
Troubleshooting....Pages 439-474
Network Design....Pages 475-502
Future of IS-IS....Pages 503-525
Back Matter....Pages 527-540
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