Series: Arista 7048-A Series
Model Format (no spaces): DCS-7048T-A-R

The Arista DCS-7048T-A-R is a high-performance 1U managed data center switch designed for high-density rack deployments. It delivers non-blocking Layer 2/3 performance with ultra-low latency and rear-to-front airflow (“-R” variant) to match hot aisle/cold aisle cooling designs.

Physical Specifications

• Rack Height: 1U (1.75 in / 4.4 cm)

• Width: 19 in (standard rack mount)

• Depth: 16 in (40.6 cm)

• Weight: ~17–18 lbs (7.7–8.2 kg)

• Airflow: Rear-to-Front (Back-to-Front)

Interface & Port Configuration

Data Ports

• 48 × 10/100/1000Base-T (RJ-45) Gigabit Ethernet

Uplink Ports

• 4 × 1/10GbE SFP+

Management Interfaces

• 1 × 10/100/1000 RJ-45 management port

• 1 × RS-232 serial console port

• 1 × USB port

This high port density makes it ideal for top-of-rack (ToR) data center deployments.

Performance Specifications

• Switching Throughput: 176 Gbps (non-blocking)

• Forwarding Rate: 132 Mpps

• Latency: As low as 3 microseconds (64-byte frames)

• Packet Buffer: 768 MB deep buffer

  • Allows simultaneous buffering across all ports (up to ~50ms traffic burst handling)

Hardware & Power

• CPU: Dual-core x86

• Memory: 4 GB DRAM / 2 GB Flash

• Power Supplies: Dual hot-swappable 460W AC (1+1 redundancy)

• Typical Power Draw: ~174W

• Maximum Power Draw: ~212W

Designed for continuous data center operation with redundant components.

Software & Advanced Features

Runs Arista Extensible Operating System (EOS), delivering enterprise-grade automation and routing capabilities.

Automation & Provisioning

• Zero Touch Provisioning (ZTP)

• Ansible, Puppet, Chef integration

Layer 2 / Layer 3 Features

• OSPF

• BGP

• ECMP (up to 16-way)

• VRRP

• MLAG

Virtualization Support

• VMTracer integration with VMware vSphere

VLAN Support

• Up to 4,094 VLAN IDs

What is ZTP on This Switch?

ZTP (Zero Touch Provisioning) allows the switch to automatically configure itself when first powered on.

How It Works

1. On first boot (no startup-config present), the switch enters ZTP mode.

2. It sends DHCP requests on all interfaces.

3. If DHCP Option 67 is provided, it downloads a config file or script via HTTP, HTTPS, FTP, or TFTP.

4. It applies the configuration and reloads automatically.

Why It’s Useful

• Rapid deployment of large switch batches

• Eliminates manual console configuration

• Reduces human configuration errors

Summary

The Arista DCS-7048T-A-R is a 1U, 48-port Gigabit Ethernet data center switch with 4×10GbE SFP+ uplinks, deep buffering, ultra-low latency, redundant power supplies, and enterprise automation via EOS. It is optimized for top-of-rack deployments requiring reliability, high throughput, and scalable Layer 3 functionality.