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64-port OSFP 800GbE switch
64-port OSFP 800GbE switch-1
800GbE Switch Panel
800GbE Switch Panel -2

CX864E-N

64×800G Switch Ultra Ethernet, 51.2Tbps, Marvell Teralynx 10, For AI/ML/Cloud Data Center/HPC

Highlights
  • Advanced AI features: WCMP, INT-based Routing,Packet Spray and more
  • World’s fastest switch with port-to-port latency under 560ns.
  • Max TDP of 2200W with 64x800G SR8 ports under full traffic load.
  • Large on chip buffer of 200+MB for better RoCE performance.
  • 10ns PTP and SyncE performance supports.
  • Open AsterNOS based on SONiC with the best SAI support.
  • Compatible with heterogeneous GPUs & SmartNICs from various vendors.
  • Line-rate programmability to support evolving UEC standards.
  • Outstanding performance in AI networks
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800GbE Ultra Ethernet Switch

64 x 800G OSFP, 51.2Tbps, Enterprise SONiC, AI/ML/Cloud Data Center/HPC/Storage

Built to power the most demanding AI training, inference, HPC, and cloud workloads, the Asterfusion CX864E-N Open Ultra Ethernet Switch is a game-changing data center solution. Delivering a massive 51.2 Tbps switching capacity and featuring 64x800G ports, it scales effortlessly to support ultra-large data centers with performance rivaling InfiniBand networks. With industry-leading ultra-low latency of just 560 nanoseconds, the 800GbE switch guarantees deterministic, high-throughput connectivity critical for latency-sensitive AI and HPC applications.

Asterfusion 800G Ultra Switch, 64 x 800G OSFP, 51.2Tbps, Enterprise SONiC, AI/ML/Cloud Data Center/HPC/Storage

Built to power the most demanding AI training, inference, HPC, and cloud workloads, the Asterfusion CX864E-N Open Ultra Ethernet Switch is a game-changing data center solution. Delivering a massive 51.2 Tbps switching capacity and featuring 64x800G ports, it scales effortlessly to support ultra-large data centers with performance rivaling InfiniBand networks. With industry-leading ultra-low latency of just 560 nanoseconds, the CX864E-N guarantees deterministic, high-throughput connectivity critical for latency-sensitive AI and HPC applications.

560ns

Ultra
Low Latency

Outperform IB

27.5% Higher TGR
20.4% Lower Latency

200+ MB

Packet
Buffer

KEY POINTS

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Key Facts

560ns

Ultra Low Latency

Outperform IB

27.5% Higher TGR
20.4% Lower Latency

200+ MB

Packet Buffer

Optimized Software
for Advanced Workloads
– AsterNOS

Pre-installed with Enterprise SONiC, the CX864E packs cutting-edge features like RoCEv2 and EVPN multihoming, delivering lightning-fast forwarding and massive packet buffers for unmatched performance. Fully UEC-compliant, it offers rich open APIs to seamlessly integrate into diverse data center and HPC ecosystems. As a vendor-neutral platform, it effortlessly supports heterogeneous GPUs and network cards from multiple manufacturers. By combining industry-leading low latency with expansive packet buffering, the CX864E sets the gold standard for next-generation AI-era data centers.
Feature Lists ↓

Optimized Software for Advanced Workloads – AsterNOS

Fully compliant with UEC standards, it offers extensive open APIs for smooth integration into diverse data center and HPC environments. As a vendor-neutral platform, it supports heterogeneous GPUs and network cards from multiple manufacturers. Combining cutting-edge low latency with large packet buffers, the CX864E sets the benchmark as the go-to switch for next-generation AI-era data centers.
Feature Lists ↓

RoCEv2

Easy RoCE
PFC/ECN/DCBX

Cloud Virtualization

DCI
VXLAN
BGP EVPN

In-Band Network Telemetry

INT Based Routing
Flowlet
WCMP
Packet Spray

High Availability

ECMP
MC-LAG
EVPN Multihoming

asternos-bg

Cloud Virtualization

DCI
VXLAN
BGP EVPN

RoCEv2

 PFC/ECN/DCBX
Easy RoCE

High Availability

ECMP
MC-LAG
EVPN Mulithoming

Ops Automation

REST API/NETCONF/gNMI
In-band Telemetry

Specifications

Ports64x 800G, 128x 400G, 256x 200G, 512x 100GSwitch ChipMARVELL TERALYNX 10
Switching Capacity51.2TbpsCut-through latency560ns
Packet forwarding rate 28700MppsPacket Buffer200+ MB
CPU Intel Xeon 8-core
USB1 x USB2.0
RAM32GB SODIMMConsole1 x Console RJ45
SSD256GB M.2 SATA/ NVMEMGMT1 x MGMT GE RJ45
Hot-swappable Fans4 (3+1Redundancy)Hot-swappable Power Supplies
2 (1+1Redundancy)
Height2UDimensions
(WxHxD mm) 		440x87x660
Input voltage200-240V AC
HVDC 200V~320V		Operating temperature0 to 40℃(32 to 104 °F)
Maximum power consumption2200W (with full ports of 800G-SR8)
Relative humidity10% - 90% (non-condensing)

Quality Certifications

ISO-9001-SGS
ISO-14001-SGS
ISO-45001-SGS
ISO-IEC-27001-SGS
fcc-icon
ce-icon

Connectivity Solutions

800G Spine + 400G Leaf Connectivity Solutions

800G Spine-Leaf AI Network Fabric

800g-spine-leaf-network fabric

Features

Marvell Teralynx 10 Inside: Unleash Industry-Leading Performance & Ultra-Low Latency

With Marvell Teralynx 10 at its core, Asterfusion 800G switches
achieve blazing-fast sub-560ns latency—perfect for AI/ML, HPC, and NVMe where speed drives results.
marvell-teralynx 10
51.2Tbps

Switching Capacity

560ns

End-to-end Latency

200+ MB

Buffer Size

51.2 Tbps

Switching Capacity

560ns

Ultra Low Latency

200+ MB

Buffer
Size

Full RoCEv2 Support for Ultra-Low Latency and Lossless Networking

Asterfusion 800G switches deliver full RoCEv2 support with ultra-low latency and
near-zero CPU overhead. Combined with PFC and ECN for advanced congestion control, it enables a true lossless network.
rocev2-vs-tcp
Optimized Features for AI/ML/HPC
Asterfusion Enterprise SONiC is optimized for AI/ML/HPC scenarios, supporting dynamic intelligent traffic distribution (Packet Spray);
Efficient and resilient path selection via WCMP (Weighted Cost Multi-Path);
Real-time precise telemetry routing based on INT Driven Routing;
as well as technologies like Flowlet and Auto Load Balancing to enhance traffic management.
ai-ml-hpc features

Asterfusion Network Monitoring & Visualization

AsterNOS supports Node Exporter to send CPU, traffic, packet loss, latency, and RoCE congestion metrics to Prometheus.
Paired with Grafana, it enables real-time, visual insight into network performance.
prometheus-paired-with-grafana

O&M in Minutes, Not Days

Automate with Easy RoCE, ZTP, Python and Ansible,  SPAN / ERSPAN Monitoring & more—cutting config time, errors, and costs.
800G switch operation and management

Asterfusion 800G Switch Outperforms InfiniBand in AI Inference with Higher TGR and Lower Latency

In AI inference networks, the Asterfusion 800G switch delivers higher TGR (Token Generation Rate) and lower P90ITL (90th Percentile Inter-Token Latency) compared to InfiniBand, demonstrating faster inference speed and greater overall throughput performance.
token-generation-rate
90th-percentile-inference-time-latency
↑27.5%

Token Generation Rate

↓20.4%

Inference Latency

↑27.5%

Token Generation Rate

↓20.4%

Inference Latency

Related Products

CX864E-NCX732Q-NCX664D-NCX564P-NCX532P-N
Port Speeds64x800G, 2x10G32x400G, 2x10G64x200G, 2x10G64x100G, 2x10G32x100G, 2x10G
Hot-swappable PSUs and FANs1+1 PSUs, 3+1 FANs1+1 PSUs, 5+1 FANs1+1 PSUs, 3+1 FANs1+1PSUs, 3+1 FANs1+1 PSUs, 4+1 FANs
MC-LAG√√√√√
BGP/MP-BGP√√√√√
EVPN√√√√√
BGP EVPN-Multihoming√√√√√
RoCEv2√√√√√
PFC √√√√√
ECN√√√√√
In-band Telemetry√√√√√
Packet Spray√××××
Flowlet√××××
Auto Load Balancing√××××
INT-based Routing√××××
WCMP√××××

Panel

800G data center switch panel-1
800G data center switch panel-2

What’s in box

800G switch with accessories

Warranty & Support

  • 2-year hardware warranty
  • 1-year free software upgrades and technical support

FAQs

Has it passed NVIDIA RoCEv2 compatibility tests?

CX864E-N has passed RoCEv2 compatibility test. Available report is tested with H20.

Does it support Inband Telemetry / INT? Can it be used for traffic visualization and bottleneck analysis?

CX864E-N supports INT. It can report metrics of BDC (Buffer Drop Collector) and HDC (High Delay Collector) to Promethus, bottleneck analysis can be realized via Grafana.

Compared to Broadcom Tomahawk 5, what are Asterfusion’s advantages?

→ Latency: 560ns vs ~800ns
→ Packet Buffer: 200MB vs 165MB

Does it support Inband Telemetry / INT? Can it be used for traffic visualization and bottleneck analysis?

CX864E-N supports INT. It can report metrics of BDC (Buffer Drop Collector) and HDC (High Delay Collector) to Prometheus, bottleneck analysis can be realized via Grafana.

What 800G optical module standards are supported (e.g., 2×FR4, 800G-LR8, 800G-ZR)? ZR/ZR+ supported?

All OSFP-form 800G modules are supported, including ZR/ZR+ modules.

How many 800G ZR modules can run simultaneously? Any thermal or downclocking protection?

Up to 32 ZR modules is recommended. CX864E-N supports thermal protection.

Does the system support ISSU (In-Service Software Upgrade), NSR, or GR?

ISSU is not supported since it requires dual control plane module in hardware. AsterNOS supports hot-patch upgrades via containers to minimize service interruption.

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