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Abstract: FTOS: A Modular Switch/Router OS Optimized for Resiliency & Scalability

As Ethernet switch/routers continue to scale in terms of link speed and port density, device resiliency is becoming an indispensable system attribute. For example, high degrees of traffic aggregation mean that even short periods of interrupted operation can disrupt a large number of traffic flows and user/subscribers, potentially violating numerous SLAs.

The best approach to maximizing the reliability/resiliency and stability of switch/routers involves the application of three basic principles:

• Elimination of single points of failure in as many system components as possible, including both hardware and software
• Ensuring that any failures that do occur are constrained to affect only one system component or subsystem
• Ensuring that when a subsystem fails, becomes compromised, or needs updating, the recovery can be accomplished quickly without disrupting the continued operation of the overall system

Table of Contents:

Introduction

FTOS Software Modularity and Resiliency

Distributed Processing in the FTOS Control Plane

Summary of FTOS Benefits for System Resiliency

Conclusion

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