Overview

This book explores the architecture, operation, and evolution of Seamless Bidirectional Forwarding Detection, a protocol that redefines real-time liveliness verification in modern transport networks. It examines SBFD's stateless design, its integration across IP, MPLS, and Segment Routing environments, and its role in automation, telemetry, and fault detection at scale. Through detailed technical chapters, it bridges theory and implementation, addressing interoperability, performance tuning, and large-scale deployment strategies. By tracing the migration from legacy BFD to SBFD and examining emerging research directions, the book provides a comprehensive view of how microsecond fault detection underpins the resilience, scalability, and intelligence of next-generation network infrastructures.

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