What is the switching capacity of Arista DCS-7250QX-64-F?

The DCS-7250QX-64-F provides 5Tbps full-duplex switching capacity with 64x 40GbE QSFP+ ports. This enables wire-speed forwarding at 3.8 billion packets per second across all ports simultaneously, ideal for spine roles in large-scale leaf-spine architectures handling bursty data center traffic.

Does it support network virtualization features?

Yes, native VXLAN Gateway termination and EVPN control plane are supported on Arista EOS. This allows scalable L2/L3 overlays for multi-tenant clouds, with up to 100K VTEPs and integrated BGP underlay, eliminating need for external gateways in 40GbE fabrics.

What latency performance does it deliver?

Port-to-port latency is under 500 nanoseconds at 40GbE line rate using Virtual Output Queue (VoQ) architecture and cut-through switching. This low-latency design combined with standards-based congestion management suits financial trading, HPC RDMA fabrics, and real-time analytics workloads.

What transceivers are compatible with the QSFP+ ports?

QSFP+ ports accept Arista-engineered 40GBASE-SR4 (OM3/OM4 MMF up to 150/400m), LR4 (SMF 10km), and ER4 (40km) optics. Breakout cables enable 4x10G SFP+ per port using compatible DAC/AOC, providing flexible 10/40G connectivity without adapters.

Is it suitable for high-availability deployments?

Yes, features MLAG for active-active LAG across MLAG peers without spanning tree, VARP for virtual IP redundancy, and Graceful Restart. Dual redundant 1150W PSUs and PSUs support N+1 power, with Stateful Switchover (SSO) for sub-second failover in EOS.

DCS-7250QX-64-F - Arista DCS-7250QX-64-F 64x40G QSFP+ 5Tbps ToR Switch

Name: Arista DCS-7250QX-64-F 64x40G QSFP+ 5Tbps ToR Switch
Brand: Arista
SKU: DCS-7250QX-64-F

DCS-7250QX-64-F - Arista DCS-7250QX-64-F 64x40G QSFP+ 5Tbps ToR Switch | US IT Hardware

Product overview

The Arista DCS-7250QX-64-F belongs to the 7250QX series of fixed-configuration switches optimized for high-density 40GbE data center environments. Equipped with 64 QSFP+ ports supporting 40GBASE-SR4/IR4/LR4 transceivers, it provides 5Tbps full-duplex switching capacity and 3.8Bpps forwarding performance. Key technologies include VoQ architecture for low-latency lossless Ethernet, deep packet buffers up to 12GB shared across ports, and native VXLAN routing for overlay networks. Running Arista EOS, it enables advanced features like MLAG for multi-chassis link aggregation, EVPN for L2/L3 VPNs, and Precision Time Protocol for synchronization. Ideal for spine-layer aggregation in Clos fabrics, hyperscale cloud provider top-of-rack, and high-frequency trading platforms requiring sub-microsecond latency. Airflow options (front-to-back, back-to-front) and redundant hot-swappable PSUs/PSFs ensure high availability. Supports breakout to 10GbE for flexible connectivity.

64x QSFP+ 40GbE ports support breakout to 10G.
5Tbps full-duplex switching capacity, non-blocking.
12GB deep packet buffers prevent congestion loss.
Sub-microsecond latency with VoQ architecture.
VXLAN and EVPN for network virtualization.
Dual hot-swap PSUs for high availability.

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-7250QX-64-F
Brand	Arista
Condition	New
Model	DCS-7250QX-64-F
Latency	<500ns @40GbE
Product Line	7250QX Series
Product Type	Fixed 40GbE Data Center Switch
Buffer Memory	12GB shared

Network & Communication

Switching Capacity
Forwarding Rate	3.8Bpps

Compatible systems

Native integration within Arista 40/100GbE fabrics; EOS interoperability with Cisco/Juniper via BGP/OSPF.

Arista 7050X
Model: Any
Form factor: 1U/2U
Generation: 40GbE
MLAG peer for LACP redundancy
Arista 7280R
Model: Any
Form factor: 1U
Generation: 100GbE
Spine uplinks via QSFP28 adapters

Best for

Data Center Spine
High-radix aggregation layer in Clos fabrics connecting thousands of servers with 40GbE uplinks.
Leaf Aggregation
Top-of-rack switch for 10/40GbE server access with VXLAN overlay for multi-tenant clouds.
Cloud Scale Networking
Hyperscale provider deployments requiring EVPN, MLAG, and 5Tbps non-blocking throughput.
HPC Clusters
High-performance computing interconnects with low-latency RoCEv2 and PTP timing support.
Financial Trading
Ultra-low latency platforms for HFT with sub-500ns port-to-port forwarding.

Details

Shipping, warranty & returns

Customer reviews

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Airflow	Front-to-Back
Operating Temp	0-40°C

Arista DCS-7250QX-64-F 64x40G QSFP+ 5Tbps ToR Switch

Product overview

Featuring

Network & Communication

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Power Consumption

Physical Characteristics

Environmental

Interface/Ports

Warranty & Support

Frequently asked questions