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Troubleshooting Cisco Nexus Switches and NX-OS, First Edition by Richard Furr, Brad Edgeworth, Vinit Jain

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Introduction

The Nexus operating system (NX-OS) contains a modular software architecture that primarily targets high-speed/high-density network environments like data centers. NX-OS provides virtualization, high availability, scalability, and upgradeability features for Nexus switches.

In particular, the NX-OS is expected to have a measure of resilience during software upgrades or hardware upgrades (failover, OIR), with both sets of operations not affecting nonstop forwarding. NX-OS is required to scale to very large multichassis systems and still operate with the same expectations of resilience in the face of outages of various kinds. The NX-OS feature set includes a variety of features and protocols that have revolutionized data center designs ...

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