The Cisco Nexus 9000 Series switches are a family of data center-class switches designed to deliver high-performance networking, scalability, and programmability for modern data center environments.

These switches are part of Cisco's data center networking portfolio and are designed to address the challenges of cloud-scale deployments, virtualization, and emerging technologies. Here are key features and aspects of the Cisco Nexus 9000 Series switches:

1. Modular and Fixed Platforms:
The series includes both modular chassis-based switches (Nexus 9500) and fixed-configuration switches (Nexus 9300 and Nexus 9200).

2. Application-Centric Infrastructure (ACI):
Nexus 9000 switches support Cisco's Application-Centric Infrastructure (ACI), a software-defined networking (SDN) solution for automating and optimizing network infrastructure.

3. High Performance:
The switches offer high-performance switching capabilities with features like line-rate Layer 2 and Layer 3 switching, low-latency forwarding, and high port density.

4. Advanced Features:
Support for advanced features such as Virtual Extensible LAN (VXLAN) for network virtualization, Quality of Service (QoS) for traffic prioritization, and Network Virtualization using Generic Routing Encapsulation (NVGRE).

5. Cisco NX-OS Operating System:
Nexus 9000 switches run the Cisco NX-OS operating system, providing a comprehensive set of networking features and capabilities.

6. Cloud-Scale Architecture:
The switches are designed with a cloud-scale architecture, addressing the scalability and automation needs of modern data centers.

7. Telemetry and Analytics:
Support for telemetry and analytics features to provide insights into network performance, health, and potential issues.

8. Software Upgrades:
Cisco provides regular software updates for the Nexus 9000 Series, delivering new features, security patches, and improvements.

9. Versatility in Deployment:
The switches are versatile and can be deployed in various scenarios, including traditional data centers, private clouds, and hybrid cloud environments.

10. Security Features:
Security features include access control lists (ACLs), role-based access control (RBAC), and support for security protocols to enhance network security.

11. Automation and Programmability:
Nexus 9000 switches support automation and programmability through APIs (Application Programming Interfaces) and integration with automation tools.

12. Multigigabit and 100G Connectivity:
Depending on the model, Nexus 9000 switches offer a range of port speeds, including multigigabit and 100G, to accommodate diverse connectivity needs.

These switches play a crucial role in supporting the networking requirements of modern data centers, where agility, scalability, and automation are essential. It's important to note that specific features and capabilities may vary based on the model and software version. For the most up-to-date and detailed information, it's recommended to consult Cisco's official documentation or reach out to Cisco directly.