51.2T Low Latency Data Center Switch

DCS-O6402ME

64x800G ultra-low latency switch with front-to-rear airflow, hot-swappable PSU and fans. Built for AI/HPC clusters with 51.2 Tbps switching capacity, RoCEv2, INT telemetry, and SeraNOS OS optimized for Ultra Ethernet.

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64×800Gb OSFP
Multi-Tenant Isolation
Low Latency
Supports RoCEv2, ECN, PFC, INT
SeraNOS Enterprise OS

Overview

The DCS-O6402ME Open Ultra Ethernet Switch is purpose-built for next-generation AI training, inference, high-performance computing (HPC), and cloud-scale data centers. With an ultra-high switching capacity of 51.2 Tbps and 64 x 800G QSFP-DD800 ports, it delivers InfiniBand-class performance over Ethernet, enabling true end-to-end throughput and ultra-low latency.

Compliant with Ultra Ethernet Consortium (UEC) standards and equipped with open, vendor-neutral APIs, the DCS864E seamlessly integrates into diverse environments with heterogeneous GPUs and NICs. Offering unmatched reliability, scalability, and software-defined openness, it is the optimal switching platform for AI-driven infrastructure at hyperscale.

Features

  • 51.2 T switch with 64 x 800 G OSFP or 128 x 400 G/512 x 100 G in 2 RU
  • World’s fastest switch with port-to-port latency under 560ns for 800 GE ports
  • Max TDP of 2200 W with 64 x 800 G SR8 ports under full traffic load
  • Large on chip buffer of 200+MB for better RoCE (RDMA over Converged Ethernet) performance
  • 10ns PTP and SyncE performance supports strictly synchronized AI parallel computing
  • Advanced INT (in-band network telemetry) for packet delays, drops, and path traversal, enabling more advanced congestion control algorithms
  • Open SeraNOS based on SONiC with best SAI support, more robust and reliable.
  • Compatible with heterogeneous GPUs and SmartNICs from all leading vendors
  • Line-rate programmability to support evolving UEC (Ultra Ethernet Consortium) standards

Software

Ultra-Low Latency Network
  • World’s Fastest Switch Silicon: Powered by Marvell Teralynx 10, delivering sub-560ns port-to-port latency for 800G. Ideal for AI/ML, HPC, and NVMe workloads.
  • Enhanced RDMA Performance: Enables ultra-low latency memory access with optimized microsecond-level performance
Lossless Network
  • Zero Packet Loss: Built-in RoCEv2 with deep QoS support (ECN, PFC, QCN, DCQCN, DCTCP) ensures lossless Ethernet for high-throughput RDMA.
  • INT-Based Congestion Visibility: In-band network telemetry monitors latency, drops, and path behavior to support AI-optimized congestion control.
High-Reliability Network
  • Massive ECMP Support: Up to 8192-way equal-cost multi-path routing for hyperscale resiliency.
  • MC-LAG with Active Multipathing: Provides multi-chassis redundancy and enhanced bandwidth utilization.
  • Rapid Failover: Fast link detection with BFD for BGP and OSPF within 50ms.
Time-Sensitive Network
  • 10ns Precision Timing: Supports high-accuracy PTP and SyncE for synchronized AI compute clusters and time-critical workloads.
Open Network
  • Enterprise SONiC Ready: Integrated with SeraNOS for modular, reliable SAI-based operation.
  • Future-Proof Programmability: Line-rate programmable to support UEC (Ultra Ethernet Consortium) standards and beyond.
Automated O&M Network
  • Effortless Operations: Full automation via Python/Ansible for deployment and maintenance.
  • Zero-Touch Provisioning (ZTP): Auto-fetch and install software/images for rapid out-of-box setup.

Panel Illustration

Specifications

Ports
 64x800G / 128x400G/256x200G/512x100G
Switch Chip
 Teralynx 10
Switching Capacity
 51.2 Tbps
Cut-through latency
 560ns
Packet forwarding rate
 14.4Bpps of L2/L3 forwarding
Packet Buffer
 200+ MB
CPU
 Intel Xeon 8-core
USB
 1 x USB2.0
RAM
 32GB SODIMM
Console
 1 x Console RJ45
SSD
 256GB M.2 SATA/NVME
MGMT
 1 x MGMT GE RJ45
Hot-swappable Fans
 4 (3+1Redundancy)
Hot-swappable Power Supplies
 2 (1+1Redundancy)
Height
 2U
Dimensions
(WxHxD mm)
 440x87x660
Input voltage
 100-240V AC
HVDC 200V~320V
Operating temperature
 0 to 40℃ (32 to 104 °F)
Maximum power consumption
 2200W
(with full ports of 800G-SR8)
Relative humidity
 10% - 90% (non-condensing)
DCS-O3202KEORU-NM4400