• Gray arista dcs-7280sr3-48yc8-f network switch with 48 25g ports and green indicator lights on front panel
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Arista

Arista DCS-7280SR3-48YC8-R | 7280R3 48-Port 25G Switch, 8x 100G QSFP28

DCS-7280SR3-48YC8-R

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Description

The Arista DCS-7280SR3-48YC8-R is a high-performance 1RU data center switch designed for leaf-spine architectures and large-scale cloud deployments. Featuring 48 x 25GbE SFP28 ports and 8 x 100GbE QSFP28 uplinks with rear-to-front airflow, it delivers 6.4 Tbps switching capacity with deep packet buffers for lossless forwarding. Ideal for IP storage, content delivery networks, and data center interconnect applications requiring predictable latency and Internet-scale routing.

Features

Deep packet buffer with Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- FlexRoute engine with flexible forwarding profiles for Internet peering, DCI, and cloud routing
- Algorithmic ACLs supporting 100,000+ rules with advanced pattern matching
- Accelerated sFlow and IPFIX for line-rate network telemetry and security analysis
- Inband Network Telemetry (INT) for packet-level forensics and latency measurement
- Full Layer 2 and Layer 3 feature set including MLAG, VXLAN, EVPN, and BGP
- Advanced QoS with weighted fair queuing, strict priority, and hybrid scheduling
- Precision Time Protocol (PTP) for sub-microsecond clock synchronization
- MACsec support for Layer 2 encryption (on compatible models)
- Hot-swappable redundant power supplies and fan modules for high availability
- Zero Touch Provisioning (ZTP) and CloudVision integration for automated deployment
- Comprehensive APIs including eAPI, OpenConfig, gNMI, and JSON-RPC
- EOS modular operating system with state sharing and in-service software upgrades
- Advanced diagnostics and proactive telemetry for predictive maintenance
- Support for NEBS Level 3 compliance (on DC power models)

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Port Configuration: 48 x 1G/10G/25G SFP28 + 8 x 40G/100G QSFP28 uplinks
- Breakout Support: QSFP28 ports support 4x10G or 4x25G breakout
- Switching Capacity: 6.4 Tbps
- Forwarding Rate: 2.4 Bpps (billion packets per second)
- Packet Buffer: 4 GB deep buffer with VOQ architecture
- MAC Address Table: Up to 384,000 entries
- IPv4 Unicast Routes: Up to 1.45 million (L3 profile)
- Latency: As low as 800 ns
- Memory: 16 GB DRAM with ECC protection
- Flash Storage: 4 GB
- CPU: Quad-core x86 Intel Atom processor
- Form Factor: 1RU fixed-configuration
- Dimensions: 1.75" H x 17.4" W x 20.7" D (44.5 x 442 x 526 mm)
- Weight: Approximately 22-26 lbs (10-12 kg)
- Airflow: Rear-to-front (R model)
- Power Supplies: Dual hot-swappable AC, 1+1 redundancy
- Cooling: N+1 redundant hot-swappable fans
- Management: Arista EOS, CLI, REST API, SNMP, NetDB
- Operating Temperature: 0°C to 40°C

FAQs

Q: What is the difference between the -R and -F airflow variants?
A: The DCS-7280SR3-48YC8-R features rear-to-front airflow (exhaust toward the front), while the -F model has front-to-rear airflow. Choose the airflow direction that matches your data center hot-aisle/cold-aisle configuration for optimal cooling efficiency.

Q: Can this switch be used as a spine or only as a leaf?
A: While commonly deployed as a leaf switch in spine-leaf fabrics, the DCS-7280SR3-48YC8-R can also serve as an aggregation or edge switch. Its 100GbE uplinks and deep buffers make it suitable for various data center roles, though dedicated spine models offer higher port density.

Q: Does this model support breakout cables on the QSFP28 ports?
A: Yes, each of the 8 QSFP28 ports supports breakout to 4x10G or 4x25G, allowing up to 80 total usable ports. This flexibility enables mixed-speed connectivity and gradual migration from 10G/25G to 100G infrastructure.

Q: What routing protocols and Layer 3 features are supported?
A: The DCS-7280SR3-48YC8-R supports full Layer 3 routing including BGP, OSPF, IS-IS, VXLAN, EVPN, MLAG, and ECMP. The FlexRoute engine provides Internet-scale routing with support for over 1.4 million IPv4 routes, making it suitable for peering and DCI applications.

Q: Is this switch compatible with third-party optics and DACs?
A: Yes, the DCS-7280SR3-48YC8-R supports industry-standard transceivers and Direct Attach Cables (DACs) in addition to Arista optics. All optical interfaces include Digital Optical Monitoring (DOM) for real-time health monitoring.

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