Product Overview
The Cisco Nexus N9K‑C9372PX‑E is a high-performance, 1RU data center switch in the Nexus 9300 series. Designed for Top‑of‑Rack and leaf/spine deployments, it includes 48 fixed 1/10 GbE SFP+ downlink ports and 6 fixed 40 GbE QSFP+ uplinks. It delivers up to 1.44 Tbps of switching capacity with over 1,150 Mpps forwarding performance. This model supports IP-based endpoint group classification optimized for Cisco ACI and enhanced VXLAN capabilities.
Product Features
48 × 1/10 GbE SFP+ server-facing ports
6 × 40 GbE QSFP+ uplinks (can support 10 GbE optics with adapters)
Non-blocking architecture delivering 1.44 Tbps internal switching bandwidth
Line-rate Layer 2/Layer 3 switching with VXLAN, ACI mode, and advanced routing
Dual-core x86 CPU (2.5 GHz) with 16 GB RAM and 64 GB SSD for programmability
Support for up to 128,000 LPM IPv4/IPv6 routes, 96,000 MAC addresses, and up to 256 VXLAN tunnel endpoints
Dual hot-swappable power supplies and fan modules; airflow can be front-to-back or reverse
Typical power consumption ~210 W minimum, up to ~537 W maximum
Product Specifications
| Specification | Details |
| Model | N9K‑C9372PX‑E (Cisco Nexus 9372PX‑E) |
| Downlink Ports | 48 × 1/10 GbE SFP+ |
| Uplink Ports | 6 × 40 GbE QSFP+ |
| Switching Capacity | 1.44 Tbps |
| Forwarding Rate | Over 1,150 Mpps |
| Shared Packet Buffer | 37 MB |
| CPU/Memory/Storage | Dual‑core 2.5 GHz x86, 16 GB RAM, 64 GB SSD |
| Max IPv4/IPv6 Routes | 128,000 |
| Max MAC Address Table Entries | 96,000 |
| ACL Entries | Up to 4,000 ingress entries |
| Power Redundancy | Dual AC/DC hot-swappable |
| Fan Modules | 4 hot-swappable fans |
| Operating Temperature | 0 °C to 40 °C |
| VLAN Support | Up to 4,096 |
Similar Models Comparison
| Model | Downlink Ports | Uplink Ports | PoE Support | Layer 3 | Buffer |
| N9K‑C9372PX‑E | 48 × 1/10 GbE SFP+ | 6 × 40 GbE QSFP+ | No | Yes | 37 MB |
| N9K‑C9372TX‑E | 48 × 1/10 GbE RJ45 | 6 × QSFP+ | No | Yes | Similar |
| N9K‑C9396PX | 48 × 10 GbE SFP+ + multiple QSFP+ uplinks | Up to 12 QSFP+ | No | Yes | Similar |
Latest in the Nexus 9300 Series
| Model | Highlights | Configuration |
| N9K‑C9372PX‑E | ACI-ready, VXLAN, improved classification | 48 × SFP+, 6 × 40 GbE QSFP+ |
| N9K‑C9372TX‑E | Copper RJ45 variant of same performance | 48 × RJ45 + 6 QSFP+ |
| N9K‑C9396PX | Higher uplink density for spine layers | 48 × SFP+ + up to 12 × QSFP+ |
