• Gray metal arista dcs-7280cr3am-72-f network switch with 72 ports and ventilation slots showing back side
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Arista

Arista DCS-7280CR3AM-72-F | 7280R3A 72-Port 100G QSFP Switch, 7.2 Tbps, MACsec

DCS-7280CR3AM-72-F

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Description

The Arista DCS-7280CR3AM-72-F is a high-density 2RU data center switch router delivering 72 ports of 100 Gigabit Ethernet with line-rate Enhanced MACsec encryption for secure cloud, enterprise, and service provider environments. Built on a deep buffer Virtual Output Queue architecture with 7.2 Tbps throughput and 3.6 Bpps forwarding rate, it provides comprehensive Layer 2/3 routing with support for EVPN, VXLAN, MPLS, and BGP. The M-variant includes Arista TunnelSec technology for AES-256-GCM authenticated encryption at Layer 2 or Layer 3, making it ideal for secure spine-leaf architectures and internet peering applications.

Features

72x 100GbE QSFP28 ports with flexible 10G/25G/40G/50G/100G support via breakout
- Enhanced MACsec (TunnelSec): Line-rate AES-256-GCM Layer 2/3 encryption
- Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- FlexRoute engine with flexible forwarding table allocation for MAC, routing, and ARP
- EVPN/VXLAN overlay network support for multi-tenant data center fabrics
- MPLS support including LDP, RSVP-TE, Segment Routing, and BGP Labeled Unicast
- Layer 2 MLAG (Multi-Chassis Link Aggregation) for active-active redundancy
- Layer 3 ECMP routing with up to 512-way load balancing
- Precision Time Protocol (PTP) IEEE 1588 and Synchronous Ethernet support
- Advanced QoS with 8 egress queues per port, traffic shaping, and policing
- CloudVision integration for centralized network management and telemetry
- Arista LANZ (Latency Analyzer) for real-time congestion monitoring
- sFlow and streaming telemetry for traffic visibility and analytics
- Zero Touch Provisioning (ZTP) for automated deployment
- Hot-swappable power supplies and fan modules for high availability
- Arista EOS with single binary image across all Arista platforms

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

72x 100 Gigabit Ethernet QSFP28 ports supporting 100G, 50G, 40G, 25G, and 10G via breakout
- Switching capacity: 7.2 Tbps full-duplex, non-blocking
- Forwarding rate: 3.6 billion packets per second
- Latency: 3.8 microseconds store-and-forward
- Enhanced MACsec (TunnelSec): Line-rate AES-256-GCM encryption at Layer 2 and Layer 3
- Memory: 64 GB DRAM, 120 GB SSD storage
- Packet buffer: Deep buffer VOQ architecture for burst absorption
- Management: 1x 1000BASE-T out-of-band management port, 1x RS-232 console port
- Form factor: 2RU rackmount, 19 inches wide
- Dimensions: 48.3 x 8.8 x 68.7 cm (19 x 3.5 x 27.0 inches)
- Weight: 22.4 kg (49.4 lbs)
- Airflow: Front-to-rear (port side intake, fan side exhaust)
- Power supplies: Dual hot-swappable 1500W AC PSU (redundant)
- Operating temperature: 0°C to 40°C
- Operating system: Arista EOS (Extensible Operating System)

FAQs

Q: What encryption capabilities does the DCS-7280CR3AM-72-F provide?
A: The M-variant includes Enhanced MACsec with Arista TunnelSec technology, delivering line-rate AES-256-GCM authenticated encryption for both Layer 2 (MACsec) and Layer 3 (IPsec) traffic. This enables secure connectivity across data centers and WAN links without impacting performance.

Q: Can the 100G QSFP28 ports be broken out to lower speeds?
A: Yes, the 72 QSFP28 ports support flexible breakout configurations to 2x 50G, 1x 40G (QSFP+), or 4x 10G/25G using appropriate breakout cables or optics, allowing adaptation to various network topologies and migration scenarios.

Q: What use cases is the 7280CR3AM-72-F best suited for?
A: This switch is ideal for high-density data center spine and leaf deployments requiring encryption, internet peering, cloud service provider networks, secure enterprise campus cores, and any application demanding high-throughput secure connectivity with advanced Layer 2/3 routing.

Q: Does this switch support advanced routing protocols?
A: Yes, running Arista EOS, it supports full BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE), Segment Routing, EVPN, VXLAN, and up to 512-way ECMP for scalable multi-path routing in modern data center and service provider environments.

Q: What is the airflow direction and why does it matter?
A: The -F suffix indicates front-to-rear airflow, where cool air enters from the port side and exhausts through the fan tray side. This is essential for hot-aisle/cold-aisle data center designs to ensure proper thermal management and equipment compatibility within the rack.

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