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What is Fast ReRouting (FRR)

Chapter 13
Handbook of Research on Redesigning the Future of Internet Architectures
A technic that happens locally in the routing area, allowing diverging traffic from a failure without waiting for a global recomputation of routing path.
Published in Chapter:
Available Routing Construct (ARC)
Patrice Bellagamba (Cisco Systems, France) and Pascal Thubert (Cisco Systems, France)
Copyright: © 2015 |Pages: 21
DOI: 10.4018/978-1-4666-8371-6.ch013
Abstract
Every computer network has been built in the last 30 years on the concept of routing tree to compute the path to be used to reach a given prefix or the border of a routing area. This chapter introduces the concept of Available Routing Construct (ARC), which is a two-end (or more) routing basic element that forms its own recovery domain. As it is dual ended, any failure in an ARC can be easily locally resolved by reversing the path toward the other end. A routing area can therefore be described in a graph of hierarchical ARCs. This new paradigm could be leveraged to improve the network resiliency and utilization for both unicast and multicast traffic.
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