Cisco N9164E-NS4-O
A 2RU 64-port OSFP 800G Ethernet switch purpose-built for AI/ML data center fabrics. Powered by the NVIDIA Spectrum-4 ASIC with 51.2 Tbps of switching capacity, 160MB on-die packet buffer, and adaptive routing for lossless RoCE transport at scale.
Product Overview
AI-Scale Switching
64 ports of 800G OSFP delivering 51.2 Tbps of aggregate bandwidth for the largest AI/ML training clusters and GPU fabrics.
NVIDIA Spectrum-4
Purpose-built ASIC for AI networking with wire-rate forwarding, deep telemetry, and adaptive routing across every port.
Lossless Transport
PFC, ECN, WRED, and adaptive routing deliver lossless RoCE/RDMA transport for distributed AI workloads without packet drops.
160MB Buffer
Intelligent on-die buffer management handles mice and elephant flows simultaneously, absorbing micro-bursts without congestion.
Day-0 Automation
POAP, NX-API, YANG models, and model-driven streaming telemetry for zero-touch provisioning and full lifecycle automation.
Flexible Breakout
Each 800G OSFP port supports 2x400G, 4x200G, or 4x100G breakout for incremental migration and mixed-speed fabrics.
Features and Benefits
800G AI fabric switching at data center scale.
The N9164E-NS4-O is engineered for the most demanding AI/ML training clusters, delivering lossless high-bandwidth transport with advanced telemetry and automation.
51.2 Tbps Capacity
NVIDIA Spectrum-4 ASIC delivers wire-rate 800G forwarding across all 64 OSFP ports simultaneously.
Lossless RoCE/RDMA
PFC, ECN, WRED, and adaptive routing ensure zero-drop transport for distributed GPU training workloads.
Programmable
NX-API, YANG, NETCONF, and model-driven streaming telemetry for full infrastructure-as-code automation.
VXLAN EVPN Fabric
Native VXLAN EVPN with BGP for scalable multi-tenant overlay networking across the data center.
High Availability
vPC, ISSU, and SMU enable non-disruptive upgrades and continuous forwarding for always-on operations.
Efficient Power & Cooling
3000W HVAC/HVDC hot-swappable PSUs and 3+1 redundant fans for reliable high-density operation.
Feature & Benefit Details
Specifications
Switching
Platform
Physical
Power & Environmental
Ordering Information
N9164E-NS4-O
Cisco N9164E-NS4-O 64-port 800G OSFP switch
N9164E-NS4-O=
Cisco N9164E-NS4-O 64-port 800G OSFP switch (spare)
PSU3KW-HVPI
3000W HVAC/HVDC power supply unit
NXASFAN-190CFMPI
Hot-swappable fan module (190 CFM)
Documentation
Data Sheet
Cisco N9164E-NS4-O 64-Port 800G OSFP Switch Data Sheet. Full specifications, features, licensing, and ordering information.
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