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This is the definitive guide to using OSPF and IS-IS protocols in large-scale IP enterprise, carrier, and service provider networks. Well-known network designer Jeff Doyle draws on his consulting experience, offering realistic advice and straight answers on every aspect of working with link-state protocolsfrom scalability, reliability, and security to area design and database synchronization.This book is organized to help network engineers and architects compare OSPF and IS-IS. One feature at a time, Doyle first demonstrates how a topic or feature is implemented in OSPF, and then walks through a similar implementation using IS-IS. Professionals who are relatively new to large-scale networking will welcome his practical introduction to the concepts, goals, and history of link state protocols. Coverage includesUnderstanding message types, encapsulation, architecture, LSAs, and LSPsOptimizing addressing, neighbor discovery, adjacencies, and router designationImproving scalability: controlling the scope of flooding, link state database size, SPF calculation efficiency, and much moreDesigning and operating large-scale networks for maximum security and reliabilityHardening networks to thwart attacks against routing protocolsComparing OSPF and IS-IS extensibilityUtilizing extensions for MPLS-based traffic engineering, IPv6, and multi-topology routingTroubleshooting OSPF and IS-IS log entries, debug output, and LS databasesDoyle's thorough explanations, end-of-chapter review questions, and many wide-ranging examples for both Cisco's IOS and Juniper's JUNOS also make this book an exceptional resource for anyone pursuing a CCIE or JNCIE certification.

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