• Gray metal arista dcs-7280cr3mk-32d4a-s-f network switch back side with multiple ports and ventilation slots
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Arista

Arista DCS-7280CR3MK-32D4A-S-F | 7280R3 32-Port 100G Switch, 4x 400G QSFP-DD, MACsec

DCS-7280CR3MK-32D4A-S-F

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Description

The Arista DCS-7280CR3MK-32D4A-S-F is a high-performance 1RU data center switch router designed for cloud, content delivery, and service provider networks. Featuring 32x 100GbE QSFP ports and 4x 400GbE QSFP-DD uplinks, this Secure Boot-enabled platform delivers 4.8Tbps wire-speed performance with 8GB deep packet buffering and 2Bpps forwarding rate. Advanced TunnelSec encryption (MACsec, IPsec, VXLANsec) with AES-256-GCM provides line-rate security while supporting large routing tables up to 256K routes, making it ideal for spine, leaf, and DCI deployments requiring scalability, low latency, and robust encryption.

Features

TunnelSec line-rate encryption: MACsec, IPsec, VXLANsec with AES-256-GCM cipher
- Secure Boot firmware integrity validation for enhanced security posture
- Deep 8GB VOQ buffer architecture eliminates head-of-line blocking
- FlexRoute engine with large routing scale (256K+ routes, MPLS, VXLAN)
- Advanced traffic management: weighted fair queueing, strict priority, ECN
- Lossless Ethernet with PFC (Priority Flow Control) and DCB support
- EVPN-VXLAN overlay networking for multi-tenant data center fabrics
- MLAG (Multi-Chassis Link Aggregation) for Layer 2 redundancy
- 512-way ECMP for Layer 3 load balancing and scalability
- Segment Routing (SR-MPLS, SRv6) for traffic engineering
- MPLS support: LDP, RSVP-TE, BGP Labeled Unicast
- Comprehensive Layer 3 routing: BGP, OSPF, IS-IS, static, policy-based routing
- Advanced monitoring: sFlow, Latency Analyzer (LANZ), telemetry streaming
- Precision Time Protocol (PTP) IEEE 1588v2 for timing synchronization
- Hot-swappable redundant power supplies and fan modules
- Zero Touch Provisioning (ZTP) and CloudVision integration for automation
- Arista EOS with rich automation, programmability, and open APIs

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 QSFP28 ports (support 40G, 50G-2, 25G, 10G breakout)
- 4x 400GbE QSFP-DD ports (backward compatible with 100G optics)
- Switching Capacity: 4.8 Tbps wire-speed, non-blocking
- Forwarding Rate: 2 Bpps (billions packets per second)
- Packet Buffer: 8GB deep buffer with VOQ architecture
- Latency: 3.8µs store-and-forward (typical)
- MAC Address Table: 736,000 entries
- Routing Capacity: Large route table support (256K+ routes, MPLS, VXLAN)
- Security: TunnelSec with MACsec, IPsec, VXLANsec (AES-256-GCM), Secure Boot enabled
- Layer 2/3 Features: MLAG, ECMP, BGP, OSPF, IS-IS, EVPN, VXLAN, Segment Routing
- Form Factor: 1RU rackmount, front-to-rear airflow
- Power: Dual redundant hot-swappable AC power supplies (2x 1000W)
- Management: Arista EOS, CLI, REST API, SNMP, sFlow, CloudVision
- Memory: 64GB DRAM, 120GB SSD (optional)

FAQs

Q: What is the difference between the MK and K variants of the 7280R3 series?
A: The MK variant (32D4A-S) includes hardware-accelerated MACsec encryption on the 100G QSFP ports via TunnelSec technology, supporting IPsec, VXLANsec, and MACsec at line rate. The K variant focuses on large routing scale. This S-F model also has Secure Boot enabled for enhanced boot-time security.

Q: Can this switch be deployed as an internet peering router?
A: Yes, the DCS-7280CR3MK-32D4A-S-F supports large routing tables (over 256K routes with FlexRoute), BGP for internet peering, deep packet buffers to handle internet traffic bursts, and full Layer 3 routing capabilities including MPLS and Segment Routing, making it suitable for peering and DCI use cases.

Q: What encryption protocols does TunnelSec support?
A: TunnelSec provides line-rate AES-256-GCM encryption using three methods: IEEE 802.1AE MACsec for point-to-point Layer 2 encryption, IPsec (RFC 4303) for Layer 3 encrypted tunnels, and VXLANsec for overlay encryption. This enables secure WAN, DCI, and multi-tenant cloud deployments without external encryption appliances.

Q: Is this switch compatible with 200G or lower-speed optics?
A: Yes. The 100G QSFP28 ports support 100G, 40G, 50G, 25G, and 10G optics with breakout cables. The 4x 400G QSFP-DD ports are backward compatible with 100G QSFP28 modules and can be configured for 200G (8x25G NRZ), providing flexible migration paths.

Q: What is the typical use case for this model?
A: Ideal for high-density spine/leaf data center fabrics, cloud provider networks, content delivery networks (CDN), IP storage networks, and data center interconnect (DCI) where line-rate encryption, deep buffering, large routing scale, and 100G/400G density are required in a compact 1RU form factor.

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