NX-OS runs as a modular, preemptive multitasking system on a Linux kernel, where each feature (like OSPF or BGP) runs as its own protected process.
Modern multi-tenant data centers require stretching Layer 2 domains across large physical distances without the risks of Spanning Tree. Virtual Extensible LAN (VXLAN) encapsulates Layer 2 Ethernet frames into Layer 3 UDP packets, allowing a highly scalable logical network to run over a standard Layer 3 IP fabric. NX-OS runs as a modular, preemptive multitasking system
This article provides an in-depth look at the Cisco Nexus switching portfolio and its NX-OS operating system. From the top-of-rack Nexus 3000 series to the cloud-scale Nexus 9000 series, we will explore the product lines, the core technologies they run, their role in modern spine-leaf and VXLAN EVPN designs, and how they support cutting-edge trends like AI networking and network automation. This article provides an in-depth look at the
The capabilities span four core areas. Provisioning allows users to bootstrap various fabric types from scratch using a fabric builder, managing incremental configurations through template-based workflows. The secure aspect delivers compliance dashboards, security advisories, CVE mitigation plans, audit logging, and micro-segmentation capabilities. For management, Nexus Dashboard facilitates fabric upgrades including hitless upgrades, pre- and post-upgrade snapshots, and change control with approval workflows integrated into systems like ServiceNow. The analytical capabilities provide global topology views, advanced AI/ML job visibility, connectivity analysis showing flow paths, delta analysis for configuration comparisons, and traffic analytics extending beyond traditional flow records. Provisioning allows users to bootstrap various fabric types
NX-OS natively handles extensive VRF instances, allowing multiple isolated routing tables to coexist on the exact same infrastructure, which is essential for multi-tenant cloud providers. Key Technologies Driving Next-Gen Fabrics
