What port configuration does the Arista DCS-7120T-4S-F provide?

The DCS-7120T-4S-F features 20x RJ45 ports supporting auto-negotiating 1/10GBASE-T copper Ethernet over Cat6/6A up to 100m, plus 4x SFP+ ports for 1/10GbE fiber or direct-attach copper uplinks, enabling flexible server-to-switch connectivity in ToR deployments.

What airflow direction and cooling components are used?

Front-to-rear (F-R) airflow with 5x FAN-7100-F fans and 2x PWR-760AC power supplies provides efficient cooling and redundancy for 24/7 data center operation, supporting 100-127V/200-240V AC inputs at 50/60Hz.

Is this switch suitable for low-latency data center applications?

Yes, the 7100 Series offers sub-microsecond latency Layer 2/3/4 switching with non-blocking architecture across all 24 ports, ideal for HPC, virtualization, and east-west traffic in leaf-spine fabrics.

What management interfaces are available?

Includes serial console port at 9600 baud with RJ-45 to DB-9 cable, plus dual Ethernet management ports for out-of-band access, enabling EOS configuration and monitoring from day one.

What is the replacement product for DCS-7120T-4S-F?

Arista recommends DCS-7050T-36-F with 32x 1/10GBASE-T RJ45 and 4x SFP+ ports, offering higher port density while maintaining front-to-rear airflow for seamless upgrade paths.

Does it support standard rack mounting?

Yes, 1RU form factor mounts in 19-inch 4-post racks using optional KIT-7100 kit; complies with local electrical codes and requires overcurrent protection for safe installation.

DCS-7120T-4S-F - Arista DCS-7120T-4S-F 20x1/10GbE RJ45 4xSFP+ ToR Switch

Name: Arista DCS-7120T-4S-F 20x1/10GbE RJ45 4xSFP+ ToR Switch
Brand: Arista
SKU: DCS-7120T-4S-F
Price: 1045 USD
Availability: InStock

DCS-7120T-4S-F - Arista DCS-7120T-4S-F 20x1/10GbE RJ45 4xSFP+ ToR Switch | US IT Hardware

Product overview

The Arista DCS-7120T-4S-F belongs to the 7100 Series of data center switches, offering high-performance, low-latency Layer 2/3/4 1/10 Gigabit Ethernet switching optimized for modern datacenter environments. Featuring 20x RJ45 ports that auto-negotiate 1/10GBASE-T speeds and 4x SFP+ uplinks supporting 1/10GbE, it provides flexible connectivity for high-density server access and aggregation. Front-to-rear airflow ensures efficient cooling in standard racks, while dual AC power supplies (PWR-760AC) and five fans (FAN-7100-F) deliver redundancy and reliability. Ideal for top-of-rack deployments, this switch supports wire-speed forwarding, advanced QoS, and VXLAN for cloud-scale networking. Its compact 1RU design minimizes space while maximizing port density, reducing cabling complexity with copper Ethernet over standard Cat6/6A cabling up to 100m. Deploy in leaf-spine architectures for east-west traffic, HPC clusters, or enterprise data centers requiring sub-microsecond latency and non-blocking throughput.

20x RJ45 ports auto-negotiate 1/10GBASE-T speeds.
4x SFP+ uplinks support 1/10GbE fiber connectivity.
Front-to-rear airflow optimizes data center cooling.
Low-latency Layer 2/3/4 switching for wire-speed performance.
Dual redundant AC power supplies ensure high availability.
Compact 1RU design maximizes rack space efficiency.

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-7120T-4S-F
Brand	Arista
Condition	Refurbished
Layer	2/3/4 Managed
Model	DCS-7120T-4S-F
Product Line	7100 Series
Product Type	Data Center Ethernet Switch

Network & Communication

Forwarding Rate	360Mpps
Switching Capacity	480Gbps full-duplex

Compatible systems

Native EOS compatibility; standard SFP+/copper cabling; rack kit optional.

Arista 7100 Series
Model: DCS-7120T
Form factor: 1RU
Generation: 1st
Direct family compatibility

Best for

Data Center Top-of-Rack
Connects high-density servers with 1/10GBASE-T copper for low-cost, long-reach access layer switching.
Leaf-Spine Fabric
Serves as leaf switch aggregating server traffic to spine via SFP+ uplinks in scalable datacenter networks.
HPC Clustering
Provides low-latency 10GbE connectivity for compute nodes in high-performance computing environments.
Cloud Provider Access
Supports auto-negotiating 1/10GbE ports for flexible multi-tenant server connectivity in cloud data centers.
Enterprise Aggregation
Aggregates 1GbE/10GbE edge traffic with SFP+ uplinks for campus-to-datacenter backbone links.
Storage Networking
Delivers 10G copper access to NAS/SAN arrays with low-latency Layer 2/3 forwarding.

Details

Shipping, warranty & returns

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Input Voltage	100-127V/200-240V AC, 50/60Hz
Power Supplies	2x PWR-760AC hot-swappable

Rack Kit	KIT-7100 optional
Form Factor	1RU, 19-inch rack-mountable
LED Indicators	Per-port 1/10G status, system PS/FAN

Fans	5x FAN-7100-F
Airflow	Front-to-Rear (F-R)

Ports	20x RJ45 1/10GBASE-T, 4x SFP+ 1/10GbE
Console	Serial RJ-45, 9600 baud
Management Ports	2x Ethernet

Arista DCS-7120T-4S-F 20x1/10GbE RJ45 4xSFP+ ToR Switch

Product overview

Featuring

Network & Communication

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Power Consumption

Physical Characteristics

Environmental

Interface/Ports

Frequently asked questions