• Gray metal arista dcs-7280cr3ak-72-flx-f 72-port 100g network switch with ventilation slots shown from back side
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Arista

Arista DCS-7280CR3AK-72-FLX-F | 7280R3A 72-Port 100G Switch, 14.4 Tbps, 8GB Buffer

DCS-7280CR3AK-72-FLX-F

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Description

The Arista DCS-7280CR3AK-72-FLX-F is a high-performance 2RU data center switch router delivering 72 ports of 100 Gigabit Ethernet in the 7280R3A Series. Designed for hyperscale cloud, service provider, and enterprise spine deployments, it features 14.4 Tbps throughput, 8GB deep packet buffers for lossless forwarding, and wire-speed Enhanced MACsec encryption on all ports. This model includes the FLX license supporting full routing up to 2 million routes, advanced MPLS, EVPN, VXLAN, and Segment Routing, making it ideal for internet peering, DCI, and AI/ML network fabrics.

Features

Arista EOS operating system with modular state-sharing architecture and in-service software upgrades
- FlexRoute engine supporting up to 2 million IPv4/IPv6 routes with algorithmic LPM for internet peering
- Enhanced MACsec providing wire-speed AES-256-GCM encryption on all 72 ports
- TunnelSec supporting IPsec and VXLANsec for encrypted tunnels across untrusted infrastructure
- 8GB deep packet buffer with Virtual Output Queue (VOQ) architecture eliminating head-of-line blocking
- Advanced MPLS including LDP, RSVP-TE, Segment Routing (SR-MPLS), FRR, and link/node protection
- EVPN-VXLAN for Layer 2 and Layer 3 overlay networking and data center interconnect
- Algorithmic ACLs with over 24,000 entries for scalable policy enforcement and traffic filtering
- Accelerated sFlow and IPFIX for wire-speed network telemetry and flow analytics
- Inband Network Telemetry (INT) for real-time per-flow latency, congestion, and path visibility
- IEEE 1588 PTPv2 with hardware timestamping and Synchronous Ethernet (SyncE) for precision timing
- Multi-Chassis Link Aggregation (MLAG) for Layer 2 active-active redundancy
- Layer 3 ECMP and UCMP for scalable, low-latency spine architectures
- CloudVision integration for network-wide automation, streaming telemetry, and change control
- Zero Touch Provisioning (ZTP) for automated deployment and configuration
- DANZ (Data ANalyzer) for advanced packet capture, mirroring, and traffic replication
- LANZ (Latency ANalyzer) for microsecond-granularity congestion and microburst detection
- Hot-swappable redundant power supplies and fan modules for continuous operation
- Flexible QoS with ingress policing, hierarchical queuing, and traffic shaping
- Comprehensive routing protocols: BGP, OSPF, IS-IS, PIM, IGMP, static routing

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: 72x 100GbE QSFP ports
- Maximum Port Flexibility: Supports 10G, 25G, 40G, 50G, and 100G optics via breakout
- Switching Capacity: 14.4 Tbps full-duplex throughput (7.2 Tbps bidirectional)
- Forwarding Rate: 2.7 billion packets per second
- Packet Buffer: 8GB deep packet buffer with Virtual Output Queue (VOQ) architecture
- Latency: As low as 3.8 microseconds
- CPU: Eight-core x86 processor
- System Memory: 64GB DRAM
- Flash Storage: USB port and SSD storage for system logs
- Encryption: Wire-speed AES-256-GCM Enhanced MACsec on all ports, TunnelSec with IPsec and VXLANsec
- Routing Scale: Up to 2 million IPv4/IPv6 routes with FlexRoute engine (FLX license)
- ACL Scale: Over 24,000 ACL entries with Algorithmic ACLs
- Timing: IEEE 1588 PTPv2, Synchronous Ethernet (SyncE), OCXO with PPS/10M/ToD inputs
- Power Supply: Dual hot-swappable 1500W AC/DC power supplies (redundant 1+1)
- Cooling: Front-to-rear airflow, hot-swappable fan modules with N+1 redundancy
- Form Factor: 2RU rack-mountable chassis
- Operating Temperature: 0°C to 40°C (32°F to 104°F)
- Management: Arista EOS (CLI, REST API, gNMI, NetConf, SNMP, ZTP, CloudVision integration)
- Compliance: NEBS Level 3, RoHS, CE, FCC

FAQs

Q: What is the difference between the R3A, R3AM, and R3AK models?
A: The 7280CR3A is the base model with standard routing scale. The R3AM adds full-port Enhanced MACsec encryption. The R3AK (this model) includes both Enhanced MACsec and large-scale routing supporting up to 2 million routes, over 24K ACL entries, and advanced MPLS-LER/LSR with traffic engineering, making it ideal for internet peering and service provider edge applications.

Q: What does the FLX license include on this model?
A: The FLX license provides full routing capability up to 2 million IPv4/IPv6 routes, advanced MPLS Label Edge Router (LER) and Label Switching Router (LSR) functionality, MPLS traffic engineering with link and node protection, EVPN, VXLAN, Segment Routing, and over 24,000 ACL entries. This is essential for internet peering, DCI, and carrier-grade deployments.

Q: Can this switch operate at different port speeds?
A: Yes. Each QSFP100 port natively supports 100G but can be configured for 40G using QSFP+ optics. With breakout cables, ports can operate as 4x25G, 4x10G, or 2x50G, providing exceptional flexibility for mixed-speed environments and gradual migration to higher speeds.

Q: What are typical deployment scenarios for this switch?
A: The DCS-7280CR3AK-72-FLX-F excels as a spine switch in large leaf-spine fabrics, internet peering router with full BGP table support, data center interconnect (DCI) gateway with encryption, high-bandwidth aggregation layer, AI/ML cluster networking with deep buffers for elephant flows, and MPLS/Segment Routing edge applications. The 8GB buffer makes it ideal for storage and burst-heavy workloads.

Q: Is this switch compatible with multi-vendor environments?
A: Absolutely. The switch runs Arista EOS, which is built on open standards including BGP, OSPF, IS-IS, MPLS, Segment Routing, EVPN, VXLAN, IEEE 802.1AE MACsec, IPsec, and standard QSFP/QSFP+ optics. It integrates seamlessly with Cisco, Juniper, and other vendors in heterogeneous data center and WAN environments.

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