Cisco N9K-C9372PX-E – Nexus 9372PX-E Leaf Switch (48×10G + 6×40G)

The Cisco Nexus N9K-C9372PX-E is a high-density, high-performance fixed-form factor switch that belongs to the Cisco Nexus 9300 family, optimized for today’s data center fabrics, enterprise campuses, and cloud environments. This model is an enhanced hardware revision of the well-known Nexus 9372PX, providing increased feature support and lifecycle improvements that ensure stability and future readiness.

In just 1 rack unit (1RU), the N9K-C9372PX-E delivers 48 fixed 1/10 Gigabit Ethernet SFP+ ports along with 6 fixed 40 Gigabit Ethernet QSFP+ uplink ports. This combination makes it suitable for high-density access deployments as well as acting as a leaf switch in a modern spine-leaf architecture. Its switching capacity reaches 1.44 Tbps, while the forwarding rate exceeds 1,150 million packets per second (Mpps), allowing it to handle massive east-west and north-south traffic flows without performance bottlenecks.

The “E” revision was introduced by Cisco to improve hardware efficiency and extend the capabilities of the platform, enabling support for additional NX-OS features and enhanced scale. This makes the N9K-C9372PX-E a more future-proof investment compared to the original 9372PX model.

From a software perspective, the switch runs Cisco NX-OS, a robust, modular, and programmable operating system that provides full support for advanced data center technologies such as:

• VXLAN for network virtualization and overlay connectivity

• MLAG (Multi-Chassis Link Aggregation) for redundancy and load balancing

• BGP EVPN as a control plane for VXLAN fabrics

• Automation & Programmability via APIs, Python, and Ansible integration

• Advanced QoS and telemetry for real-time network visibility

In addition, its 40G uplinks can be used natively at 40GbE or configured for breakout into 4×10G lanes, which provides design flexibility in aggregation layers or inter-rack connectivity.

The N9372PX-E is ideal for multiple scenarios:

• As a leaf switch in a large data center fabric connecting servers, storage, and hyperconverged infrastructure

• As an aggregation switch in medium to large enterprise networks

• As a campus distribution switch, bridging high-density access to the core

Its compact design, high throughput, and low latency make it suitable for mission-critical workloads such as virtualization, big data, cloud storage, AI/ML clusters, and high-frequency trading environments where every microsecond counts.

Overall, the Cisco N9K-C9372PX-E represents a perfect blend of density, flexibility, and efficiency, providing enterprises with the performance required today and the scalability needed for tomorrow.

Key Features & Benefits

• 48 × 10G SFP+ fixed access ports plus 6 × 40G QSFP+ uplinks.

• 1.44 Tbps switching capacity, > 1,150 Mpps forwarding rate.

• Enhanced hardware revision (“E”) with improved feature support.

• High port density with flexible uplink aggregation.

• Full NX-OS integration: programmability, telemetry, buffer control.

• Suitable for leaf in spine-leaf, aggregation, campus designs.

Technical Specifications

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