Segment Routing Part I by Clarence Filsfils, PDF 1542369126

Segment Routing Part I

  • Title: Segment Routing Part I
  • Autor: Clarence Filsfils
  • Publisher (Publication Date): CreateSpace Independent Publishing Platform; 1 edition (January 17, 2017)
  • Language: English
  • ISBN-10: | 1542369126
  • ISBN-13: | 978-1542369121
  • File Format: EPUB, PDF


Over the past ten years, operators have heavily invested in network infrastructure because of exploding growth in IP traffic. Moreover, the lack of close interaction between applications and network infrastructure has made the situation even worse:

  • Traffic engineering solutions fell short of expectations, and as a result, network infrastructures are largely underutilized.
  • Implementation and operational complexity have led to a surge in operating expenditures, along with greater network instability.

Segment Routing (SR) addresses these challenges by focusing on operational simplicity, better scale, and better application utilization of the installed infrastructure.

SR achieves this by moving state from the network to the packet header. This simplifies and scales the network while putting the application in control.

For the first time in the IP industry, applications program inter-domain SLA-enabled policies at scale through the Data Center, the metro/aggregation and the backbone.

Segment Routing has been designed from day one for SDN and seeks the right balance between distributed intelligence, centralized optimization, and application-based policy creation.

Many operators across different market segments – Over-The-Top, Hyper-Scale Cloud, Service Providers, Enterprise – have publicly expressed their investment into Segment Routing as the de-facto SDN architecture.

This book aims at sharing and explaining the technology to a broad audience. Formal concepts are introduced together with the use-cases that lead to their definition. Doing so, the reader follows the insights and experience of the inventor of the technology and understands why it was designed this way. To further enhance the practical understanding of the technology, the authors have collected opinions from many operators who worked with them during this project. These insights help the reader to better understand the objective and benefits of the technology and its numerous deployment use-cases.

This book is also available in Kindle ebook format

No reviews


Well written book and it has a comprehensive treatment of Segment Routing over MPLS data plane. It starts with the basic concepts like SR IGP control plane, SR data plane and ramps up to advanced concepts like topology independent LFA, SR for the data center to SR BGP control plane and SR LDP internetworking via SR mapping server.

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