• Arista dcs-7280cr3mk-32d4a-s-flx-r gray metal network switch with 32 100g ports 4 400g ports and ventilation slots
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Arista

Arista DCS-7280CR3MK-32D4A-S-FLX-R | 7280R3 32-Port 100G + 4-Port 400G Switch, MACsec

DCS-7280CR3MK-32D4A-S-FLX-R

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Description

The Arista DCS-7280CR3MK-32D4A-S-FLX-R is a high-performance data center switch router delivering 4.8 Tbps throughput with 32x 100GbE QSFP and 4x 400GbE QSFP-DD ports. Designed for demanding cloud, spine-leaf, and data center interconnect deployments, it features MACsec encryption, large routing tables supporting over 256K routes, 8GB packet buffer for lossless forwarding, and rear-to-front airflow with dual AC power supplies. Running Arista EOS, it provides advanced Layer 2/3 capabilities with MPLS, VXLAN, EVPN, and comprehensive network telemetry for modern data center environments.

Features

Layer 2 and Layer 3 wire-speed forwarding with full routing protocol support
- Dynamic deep buffer (8GB) with Virtual Output Queue (VOQ) architecture for lossless forwarding
- MACsec line-rate encryption with AES-256-GCM on 100G QSFP ports
- Arista FlexRoute engine supporting over 256K IPv4 routes with large route profile
- MPLS LSR/LER capabilities with VXLAN and EVPN for overlay networking
- Algorithmic ACLs for high-scale access control with 100K+ rule capacity
- Accelerated sFlow and IPFIX for high-resolution network telemetry
- Inband Network Telemetry (INT) for real-time per-flow visibility
- MLAG (Multi-Chassis Link Aggregation) for high availability designs
- BGP, OSPF, IS-IS routing protocols with IPv4 and IPv6 support
- IEEE 802.1Q VLAN tagging and 802.1ad Q-in-Q
- Precision Time Protocol (PTP) and Synchronous Ethernet (SyncE)
- Redundant hot-swappable power supplies and fan modules
- Zero Touch Provisioning (ZTP) for automated deployment
- Arista CloudVision integration for network-wide visibility and automation
- LANZ (Latency Analyzer) for microburst detection and congestion analysis
- Port breakout support for flexible connectivity (100G to 4x25G or 4x10G)
- ECMP (Equal-Cost Multi-Path) routing up to 512-way for load balancing
- Secure Boot enabled for hardware-level security
- Arista EOS with in-service software upgrades and modular state-sharing architecture

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

32x 100GbE QSFP ports (supports 10G/25G/40G/50G/100G with breakout)
- 4x 400GbE QSFP-DD ports (supports 100G/400G)
- Switching capacity: 4.8 Tbps full-duplex (9.6 Tbps aggregate)
- Forwarding rate: 2 Bpps (billion packets per second)
- Latency: From 3.8 microseconds
- Packet buffer: 8 GB dynamic deep buffer with VOQ architecture
- System memory: 64 GB DRAM
- CPU: Quad-Core or Eight-Core x86 processor
- Flash storage: Up to 120 GB SSD
- Routing table: Supports over 256K IPv4 routes with large route profile
- MAC address table: Up to 768,000 entries
- Security: MACsec with AES-256-GCM encryption on QSFP ports
- Airflow: Rear to front (back to front)
- Power: Dual AC power supplies, hot-swappable
- Form factor: 1RU rack-mountable
- Management: CLI, web GUI, SNMP, Arista CloudVision, Zero Touch Provisioning
- Operating system: Arista EOS with Secure Boot enabled

FAQs

Q: What routing capabilities does the DCS-7280CR3MK-32D4A-S-FLX-R support?
A: This model includes the FLX license supporting large routing tables with over 256K IPv4 routes, MPLS LSR and LER functionality, EVPN, VXLAN, and Segment Routing. It's designed for spine-leaf architectures, data center interconnect, and internet peering applications requiring extensive routing scale.

Q: What encryption capabilities are included with MACsec on this switch?
A: The switch supports Arista TunnelSec technology with line-rate MACsec encryption using AES-256-GCM on all 32 QSFP 100G ports. This provides point-to-point link layer encryption without impacting forwarding performance, ideal for securing data in transit across data center fabrics.

Q: Can the 400GbE QSFP-DD ports be used with 100GbE optics?
A: Yes, the 4x QSFP-DD ports are flexible and can support both 100GbE and 400GbE optics, allowing you to scale bandwidth as needed. The 32x QSFP ports also support breakout configurations for 4x25G or 4x10G connectivity on alternate ports.

Q: What is the significance of the rear-to-front airflow designation?
A: The -R suffix indicates rear-to-front airflow, where cooling air flows from the fan side to the port side. This airflow pattern must match your data center hot aisle/cold aisle design. Arista also offers front-to-rear (-F) and configurable airflow models for different deployment scenarios.

Q: Is this switch suitable for both leaf and spine roles in a data center?
A: Yes, the 7280R3 Series is designed as a universal leaf and spine platform. With 32x100G and 4x400G ports, deep packet buffers, large routing tables, and EVPN/VXLAN support, it excels in both leaf (top-of-rack aggregation) and spine (data center backbone) roles in modern cloud-scale networks.

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