The Arista DCS-7260CX3-64-R is a high-performance 1U rack-mountable data center switch engineered for next-generation cloud, high-frequency trading, and hyperscale environments. It features 64 ports of 100GbE QSFP28 connectivity plus 2 SFP+ management ports, delivering 6.4Tbps aggregate switching capacity with industry-leading 450 nanosecond latency in cut-through forwarding mode. The switch incorporates a 42MB dynamically allocated shared packet buffer pool, dual hot-swappable power supplies, and N+1 redundant hot-swap fans. Rear-to-front airflow cooling (-R designation) supports flexible data center thermal management. Advanced Layer 2/3 routing protocols including OSPF, BGP, IS-IS, and MP-BGP enable complex network topologies. The dual-core x86 CPU with 8GB DRAM and 30GB flash storage supports CloudVision management, custom Linux applications, and programmatic network automation via Python and C++. Ideal for spine switches, cloud interconnects, and performance-critical east-west traffic patterns.
6.4Tbps switching capacity with 450ns latency.
64x100GbE QSFP28 ports plus 2x SFP+ management.
42MB dynamic packet buffer with smart allocation.
Dual-core x86 CPU with 8GB DRAM, 30GB flash.
Dual hot-swappable PSUs, N+1 redundant fans.
Rear-to-front airflow, 1U form factor, 22.5 lbs.
Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.
Featuring
Manufacturer part #
DCS-7260CX3-64-R
Brand
Arista
Condition
Refurbished
Model
7260CX3-64
Product Line
7260X3 Series
Product Type
Data Center Ethernet Switch
Extensibility
Linux tools, Bash shell, RPM support, Custom kernel modules, Python, C++, Native KVM/QEMU, Programmatic system state access
Cooling Variant
Rear-to-front (-R); Front-to-rear (-F) also available
Link Aggregation
LACP (802.3ad), up to 64 LAG groups with 64 members per LAG
The DCS-7260CX3-64-R integrates seamlessly into Arista-based data center networks and CloudVision management ecosystems. It requires 100GbE QSFP28 optical transceivers (sold separately) for port connectivity. Standard 19-inch rack infrastructure and dual AC power distribution are required. The switch supports heterogeneous multi-vendor environments through standards-compliant routing protocols and OpenFlow/SDN integration.
Arista Networks 7260X3 Series
Model: 7260CX3-64
Form factor: 1U Rack-Mountable
Generation: X3
Part of Arista 7260X3 family; compatible with CloudVision management platform; supports stacking via MLAG (Multi-Chassis Link Aggregation)
Best for
Data Center Spine
Core aggregation layer for large-scale data center fabrics requiring non-blocking 100GbE connectivity and ultra-low latency for east-west traffic between leaf switches and compute clusters.
Cloud Networking
High-capacity interconnect for cloud service provider networks, supporting VXLAN overlay networks, VM migration, and multi-tenant traffic isolation with dynamic buffer allocation.
High-Performance Computing
HPC cluster interconnect delivering 450ns latency and 6.4Tbps throughput for tightly-coupled parallel computing workloads requiring deterministic, low-jitter network performance.
High-Frequency Trading
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Advanced Event Management (AEM), CLI Scheduler, Event Manager, Event Monitor, sFlow (RFC 3176), TCPDump packet capture, Mirror to CPU
Multi-Chassis Aggregation
MLAG with up to 64 MLAG pairs
Storage
Flash Storage
30 Gigabytes
Processor
CPU
Dual-Core x86
System Memory
8 Gigabytes DRAM
Network & Communication
Latency
450 nanoseconds (cut-through mode)
IPv4 Routes
128,000 routes
Forwarding Rate
4.8 Billion packets per second (Bpps)
IPv4 Host Routes
104,000 host routes
MAC Address Table
136,000 entries
Switching Capacity
6.4 Tbps
Packet Buffer Memory
42 MB shared with dynamic allocation
Power Consumption
Power Supply
Dual 1+1 redundant hot-swappable AC power supplies
Power Cords Included
2x C19-C20 power cords
Physical Characteristics
Weight
22.5 pounds
Dimensions
1.75 (H) x 17.5 (W) x 20.3 (D) inches
Form Factor
1U Rack-Mountable
Environmental
Cooling
Rear-to-front airflow with N+1 redundant hot-swap fans
Operating Humidity
10% to 90% non-condensing
Storage Temperature
-40 to 70°C (-40 to 158°F)
Operating Temperature
0 to 40°C (32 to 104°F)
Interface/Ports
USB Ports
1x USB
Port Count
64x 100GbE QSFP28 + 2x SFP+
Serial Console
1x RS-232 (RJ-45)
Management Port
1x 10/100/1000 Ethernet
Maximum 50GbE Ports
128 (via breakout cables)
Maximum 100GbE Ports
64
Financial market data distribution and order routing with sub-microsecond latency, supporting time-critical algorithmic trading infrastructure and real-time market feeds.
Content Delivery Networks
CDN backbone aggregation with massive port density and throughput for distributing video, streaming media, and large-scale content across geographically distributed data centers.
Machine Learning Infrastructure
GPU cluster networking for distributed deep learning and AI training, enabling high-bandwidth all-to-all communication patterns between compute nodes with minimal congestion.
Frequently asked questions
What is the switching capacity and forwarding rate of the DCS-7260CX3-64-R?
The switch delivers 6.4Tbps aggregate switching capacity with a forwarding rate of 4.8 billion packets per second (Bpps). This non-blocking architecture ensures wire-speed forwarding across all 64x100GbE ports simultaneously, supporting full-duplex traffic patterns without congestion or packet loss in properly designed network topologies.
How does the 450ns latency benefit high-frequency trading and real-time applications?
The 450 nanosecond cut-through latency enables sub-microsecond end-to-end network delays critical for algorithmic trading, financial data distribution, and time-sensitive applications. This ultra-low latency is achieved through optimized packet forwarding hardware and minimal buffering, providing competitive advantage in latency-sensitive market environments.
What packet buffer capacity does the 7260CX3-64 provide and how is it allocated?
The switch features 42MB of shared packet buffer memory with dynamic buffer allocation technology. The buffer pool automatically allocates capacity to congested ports, preventing packet loss during traffic bursts while maintaining low latency for non-congested flows. This smart allocation optimizes performance across diverse traffic patterns.
What cooling options are available and what does the -R designation mean?
The DCS-7260CX3-64-R features rear-to-front airflow cooling (-R designation), drawing cool air from the rear and exhausting hot air toward the front. This configuration supports flexible data center thermal design. A front-to-rear variant (DCS-7260CX3-64-F) is also available. Both include N+1 redundant hot-swap fans and dual hot-swappable power supplies.
What management and automation capabilities does the switch support?
The dual-core x86 CPU with 8GB DRAM enables CloudVision management integration, SNMP v1/v2/v3, SSH, Telnet, and syslog. Advanced automation includes Python and C++ programmatic access, native KVM/QEMU virtualization, Linux bash shell scripting, and custom kernel modules. eAPI and OpenFlow support enable SDN integration and network orchestration.
Which routing protocols and Layer 3 features are supported?
The 7260CX3-64 supports OSPF, OSPFv3, BGP, MP-BGP, IS-IS, and RIPv2 routing protocols. Advanced Layer 3 features include ECMP load balancing, VRF multi-tenancy, BFD fast failover, PIM-SM/PIM-SSM multicast, VRRP redundancy, and policy-based routing (PBR). This comprehensive routing feature set supports complex enterprise and service provider network designs.
What is the physical form factor and power consumption?
The DCS-7260CX3-64-R is a 1U rack-mountable switch measuring 1.75 inches (H) x 17.5 inches (W) x 20.3 inches (D) and weighing 22.5 pounds. It includes dual AC power supplies with hot-swap capability. Operating temperature range is 0-40°C (32-104°F) with 10-90% non-condensing humidity support, suitable for standard data center environments.
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