Cisco N9K-X9732C-EX – Nexus 9000 Line Card 32×100G QSFP28

The Cisco N9K-X9732C-EX is a high-density 100 Gigabit Ethernet line card designed for the Cisco Nexus 9500 Series modular switches, part of the broader Nexus 9000 family. It was created to address the increasing demand for massive east-west and north-south bandwidth in modern data centers, cloud environments, and service provider infrastructures.

This card delivers 32 fixed QSFP28 ports, each capable of operating at 100G line rate or breaking out into multiple 25G lanes, which provides operators with unmatched flexibility in designing networks. With its cloud-scale architecture, the line card integrates seamlessly into spine-leaf topologies, supporting both enterprise workloads and large-scale web or service provider fabrics.

Beyond simple port density, the N9K-X9732C-EX is engineered for performance and efficiency. It supports advanced buffer management, congestion control algorithms, and telemetry capabilities that provide real-time network visibility. With these features, IT administrators can detect microbursts, ensure fair bandwidth allocation, and guarantee low-latency delivery for critical applications such as cloud workloads, virtualization, storage networking, and high-frequency trading.

The card runs under Cisco NX-OS, a robust and modular network operating system, ensuring consistent policy, automation integration, and programmability across the Nexus portfolio. It also interoperates with Cisco’s ACI (Application Centric Infrastructure), providing a smooth migration path for organizations adopting SDN (Software Defined Networking).

Additionally, the N9K-X9732C-EX was built to scale securely. With features like line-rate MACsec encryption, ACLs, QoS, and multicast optimization, enterprises can extend their data center infrastructure without compromising on performance or security.

It is important to note that Cisco has announced the End-of-Sale / End-of-Life for this model, meaning customers should carefully plan lifecycle management, spares strategy, and long-term support contracts. Nonetheless, it remains a reliable and cost-efficient option in environments where high-capacity 100G connectivity is required.

In summary, the Cisco N9K-X9732C-EX offers the perfect balance of port density, programmability, and performance, making it an essential building block for organizations modernizing their data center fabrics and interconnects.

Key Features & Benefits

• 32 × 100G QSFP28 ports (supports breakout to 4×25G).

• High port density for spine/leaf or aggregation roles.

• Compatible with Nexus 9000 / 9500 platform line card slots .

• Supports advanced features: telemetry, buffer management, etc., under NX-OS .

• Ideal for data center fabrics requiring high bandwidth and scalability.

Technical Specifications

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