: Acts as a remote line card for parent switches, providing flexible server connectivity across multiple racks. 3. Next-Generation Architecture Components
NX-OS is software, but its magic is unlocked by purpose-built ASICs. Here is the current landscape:
Virtual Device Contexts (VDCs): NX-OS allows a single physical chassis to be partitioned into multiple logical switches. Each VDC has its own configuration, resources, and management interface, enabling true multi-tenancy.
NX-API: Allows developers to manage the switch using HTTP/HTTPS calls and JSON/XML payloads. : Acts as a remote line card for
Cisco NX-OS is a highly modular, resilient, and mission-critical operating system specifically designed for data center-class environments
Virtual Port Channels (vPC): One of the most critical features of Nexus switching is vPC. It allows links physically connected to two different Cisco Nexus devices to appear as a single port channel to a third device. This eliminates the need for Spanning Tree Protocol (STP) blocked ports, maximizing bandwidth utilization.
While standard EtherChannel links together multiple ports on a single switch, vPC allows a downstream device to create a single port channel spread across two distinct physical Cisco Nexus switches. This delivers loop-free, active-active forwarding paths without ever invoking Spanning Tree blocking modes. 2. VXLAN (Virtual Extensible LAN) Here is the current landscape: Virtual Device Contexts
VXLAN (Virtual Extensible LAN) creates Layer 2 overlay networks over a Layer 3 underlay. NX-OS implements as the control plane.
Traditional VLANs are limited to 4,096 segments and are constrained by physical topology. Next-generation data centers require tenant isolation at cloud scale. Enter (Virtual Extensible LAN) as a native feature of NX-OS.
Using Ethernet VPN (EVPN) as the BGP-driven control plane reduces unnecessary broadcast traffic across the data center by distributing MAC and IP address visibility directly across the routing layer. Cisco NX-OS is a highly modular, resilient, and
NX-OS features NX-API, allowing developers to interact with the switch using web-style HTTP/HTTPS requests. It translates standard CLI commands into structured JSON or XML outputs, making it simple to pull statistics or push configurations programmatically.
Native support for YANG data models enables granular network configuration via programmatic interfaces like NETCONF and RESTCONF.
Understanding the Role of Cisco Nexus Switches in ACI Architecture