OSPF and IS-IS : From Link State Routing Principles to Technologies

This book describes and compares both the IPv4 and IPv6 versions of OSPF and IS-IS. It explains OSPF and IS-IS by grounding the analysis on the principles of Link State Routing (LSR). It deliberately separates principles from technologies. Understanding the principles behind the technologies makes the learning process easier and more solid. Moreover, it helps uncovering the dissimilarities and commonalities of OSPF and IS-IS and exposing their stronger and weaker features. The chapters on principles explain the features of LSR protocols and discuss the alternative design options, independently of technologies. The chapters on technologies provide a comprehensive description of OSPF and IS-IS with enough detail for professionals that need to work with these technologies. The final part of the book describes and discusses a large set of experiments with Cisco routers designed to illustrate the various features of OSPF and IS-IS. In particular, the experiments related to the synchronization mechanisms are not usually found in the literature.

本書描述並比較了 OSPF 和 IS-IS 的 IPv4 和 IPv6 版本。它通過基於鏈路狀態路由（LSR）原則的分析來解釋 OSPF 和 IS-IS。它有意將原則與技術分開。了解技術背後的原則可以使學習過程更輕鬆和更扎實。此外，它有助於揭示 OSPF 和 IS-IS 的差異和共同點，並暴露它們的優勢和劣勢。原則章節解釋了 LSR 協議的特點，並獨立於技術討論了替代設計選項。技術章節提供了對 OSPF 和 IS-IS 的全面描述，並提供足夠的細節供需要使用這些技術的專業人士參考。本書的最後一部分描述並討論了一系列使用 Cisco 路由器進行的實驗，旨在說明 OSPF 和 IS-IS 的各種特點。特別是與同步機制相關的實驗通常在文獻中找不到。

Rui Valadas is a Full Professor at Instituto Superior Técnico, Universidade de Lisboa, Portugal, and a senior researcher of Instituto de Telecomunicações, Portugal. He was previously at the University of Aveiro, Portugal. He has had a regular teaching activity since 1986 and has been responsible for more than 20 University courses, at the various levels, BSc, MSc, and PhD, mainly in the area of Computer Networking. He set up, at both the University of Aveiro and Instituto Superior Técnico, laboratory infrastructures for teaching Computer Networks. He also created Cisco Academies at both Universities and is a CCNA instructor. He organized several courses targeted to industry with a laboratory component, namely a practical course on basic TCP/IP networking and a practical course on TCP/IP networking security. He has reasoned for long on the teaching methodologies of Computer Networking and published several papers on the subject. Among other management duties, he was the first director of the PhD course in Telecommunications jointly organized by the Universities of Minho, Aveiro, and Porto, in Portugal, and he coordinates since 2009 the BSc/MSc on Telecommunications and Informatics Engineering of Instituto Superior Técnico. His scientific activity concentrated on two main areas: Wireless Optical Communications (in the past) and Computer Networking, with an emphasis in Routing and Traffic Engineering aspects (currently). He supervised more than 30 PhD thesis and MSc dissertations. He played an active role is the specification of the IEEE 802.11 standard, being the author of 20 contributions to this standard. He participated in 25 research projects, both national and European, most of them as the responsible investigator. He is the author of 4 book chapters, and more than 100 papers in international journals and conferences. His papers deserved more than 2000 citations and an h-index of 22, according to Google Scholar.

Rui Valadas是葡萄牙里斯本大學理工學院（Instituto Superior Técnico）的全職教授，也是葡萄牙電信研究所（Instituto de Telecomunicações）的高級研究員。他曾在葡萄牙阿維羅大學（University of Aveiro）任職。自1986年以來，他一直從事教學工作，負責超過20門大學課程，包括學士、碩士和博士課程，主要涉及計算機網絡領域。他在阿維羅大學和理工學院都建立了計算機網絡教學的實驗室基礎設施。他還在這兩所大學建立了思科學院（Cisco Academies），並擔任CCNA教師。他組織了幾個針對工業界的課程，包括基礎TCP/IP網絡和TCP/IP網絡安全的實踐課程。他長期思考計算機網絡的教學方法論，並發表了多篇相關論文。除了其他管理職責外，他還是葡萄牙明奧大學（Universities of Minho, Aveiro, and Porto）聯合組織的電信博士課程的首任主任，自2009年起負責理工學院的電信與信息工程學士/碩士課程。他的科學活動主要集中在兩個主要領域：無線光通信（過去）和計算機網絡，重點是路由和流量工程方面（目前）。他指導了30多個博士論文和碩士論文。他在IEEE 802.11標準的制定中發揮了積極作用，是該標準的20項貢獻的作者。他參與了25個國家和歐洲的研究項目，其中大部分是負責調查人。他是4本專書的章節作者，並在國際期刊和會議上發表了100多篇論文。根據Google Scholar的統計，他的論文被引用超過2000次，h指數為22。