• Gray metal arista dcs-7280cr3k-32d4 network switch with multiple ports and ventilation slots on the back side
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Arista

Arista DCS-7280CR3K-32D4 | 7280R3 32-Port 100G Switch, 4x 400G QSFP-DD, 8GB Buffer

DCS-7280CR3K-32D4

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Description

The Arista DCS-7280CR3K-32D4 is a high-performance 1RU data center switch router designed for spine-and-leaf fabrics, AI/ML clusters, and service provider networks. With 32x 100GbE QSFP28 ports, 4x 400GbE QSFP-DD uplinks, and 4.8 Tbps non-blocking switching capacity, it delivers wire-speed Layer 2/3 forwarding with 8GB deep packet buffer for lossless traffic handling. The K-variant FlexRoute engine supports over 5 million IPv4 routes, making it ideal for internet peering, data center interconnect, and high-density cloud deployments.

Features

Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- FlexRoute K-variant engine with flexible forwarding profiles for diverse network roles
- Algorithmic ACLs supporting 100K+ rules with hardware acceleration
- Accelerated sFlow and IPFIX for line-rate telemetry and network monitoring
- Inband Network Telemetry (INT) for flow and packet forensics
- VXLAN gateway, bridging, and routing with VMTracer integration
- Multi-Chassis Link Aggregation (MLAG) for active-active L2 topology
- 512-way ECMP for load balancing and resilient network design
- Standards-based IEEE 802.1AE MACsec (optional on M-variant models)
- IEEE 1588v2 PTP and Synchronous Ethernet (SyncE) for precise timing
- Zero-Touch Provisioning (ZTP) for automated deployment
- CloudVision integration for centralized management and telemetry
- Hot-swappable redundant power supplies and fan modules
- In-service software upgrades with stateful process restart
- Comprehensive L2 features: VLANs, STP/RSTP/MSTP, LACP, LLDP
- Advanced QoS: Classification, ingress policing, hierarchical QoS, shaping

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 (supporting 100G/50G/40G/25G/10G breakout modes)
- 4x 400GbE QSFP-DD ports (supporting 400G/200G/100G line rates)
- Switching capacity: 4.8 Tbps throughput, 2 Bpps forwarding rate
- Packet buffer: 8GB VOQ deep buffer with dynamic allocation
- Latency: 3.8 microseconds store-and-forward
- MAC address table: 736,000 entries (K-variant balanced profile)
- Routing scale: Over 5 million IPv4 routes, 5 million IPv6 routes (FlexRoute K-variant)
- System memory: 64GB DRAM, 120GB SSD storage
- Processor: Quad-core x86 CPU
- Management: 1x 1G management port, 1x RS-232 console port
- Power supplies: 2x 1000W AC hot-swappable PSU (configurable airflow)
- Airflow: Configurable front-to-rear or rear-to-front
- Form factor: 1RU, 48.3 x 4.4 x 55.8 cm, 12.3 kg
- Operating system: Arista EOS with CloudVision integration

FAQs

Q: What routing capabilities does the DCS-7280CR3K-32D4 support?
A: The K-variant FlexRoute engine supports internet-scale routing with over 5 million IPv4/IPv6 routes, full BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP LU), Segment Routing, EVPN, VXLAN, and 512-way ECMP for large-scale leaf-spine and service provider deployments.

Q: How does the 8GB buffer benefit network performance?
A: The 8GB VOQ deep buffer architecture handles transient congestion, TCP incast events, and bursty traffic patterns without triggering early packet drops. This ensures lossless forwarding for storage traffic, AI/ML workloads, and oversubscribed topologies common in modern data centers.

Q: What is the difference between CR3 and CR3K models?
A: The CR3K variant includes expanded routing tables (over 5 million routes vs. 1.4 million), larger MAC address capacity (736K vs. 448K), and Algorithmic ACLs supporting 100K+ rules. K-series is optimized for internet peering, DCI, and carrier edge applications requiring internet-scale tables.

Q: Can this switch be used in both leaf and spine roles?
A: Yes, the DCS-7280CR3K-32D4 functions as a universal leaf/spine platform. The 32x 100G ports serve leaf connectivity while the 4x 400G QSFP-DD uplinks provide spine or inter-fabric connections. FlexRoute profiles can be tuned for either role depending on routing vs. host table requirements.

Q: What airflow configuration is specified by the base SKU?
A: The base SKU DCS-7280CR3K-32D4 indicates configurable fans and power supplies. The -F suffix (front-to-rear) and -R suffix (rear-to-front) variants specify airflow direction. Ensure you order the correct airflow model to match your hot-aisle/cold-aisle data center design.

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