• Gray metal network switch with multiple ports and ventilation slots shown from the back arista dcs-7280cr3k-32d4-flx-r model
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Arista

Arista DCS-7280CR3K-32D4-FLX-R | 7280R3 32-Port 100G Switch, 4x 400G QSFP-DD

DCS-7280CR3K-32D4-FLX-R

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Description

The Arista DCS-7280CR3K-32D4-FLX-R is a high-performance 1RU data center switch router delivering 4.8 Tbps non-blocking throughput with 32x 100GbE QSFP28 and 4x 400GbE QSFP-DD ports. Designed for cloud, content delivery, and spine/leaf architectures, this K-variant model features FlexRoute for large routing tables supporting over 256K routes, MPLS, VXLAN, and Segment Routing. The rear-to-front airflow configuration and dual redundant AC power supplies ensure reliable operation in demanding data center environments.

Features

FlexRoute engine with support for over 256K IPv4/IPv6 routes (up to 5M with advanced profiles)
- Virtual Output Queue (VOQ) architecture with 8 GB deep buffer for lossless forwarding
- Full Layer 2/Layer 3 switching and routing capabilities
- BGP, OSPF, IS-IS, MPLS, Segment Routing, EVPN, VXLAN support
- 512-way ECMP for load balancing and redundancy
- Algorithmic ACLs for high-scale access control and policy-based forwarding
- Accelerated sFlow with hardware-based sampling up to 1:500 at line rate
- Inband Network Telemetry (INT) for flow and packet forensics
- IEEE 1588v2 PTP for precision timing with hardware timestamping
- CloudVision integration for centralized management and automation
- Zero-Touch Provisioning (ZTP) for rapid deployment
- Multi-Chassis Link Aggregation (MLAG) for active/active topologies
- Hot-swappable dual power supplies and fan modules
- Arista EOS with Linux-based architecture and in-service software upgrades
- Advanced telemetry: LANZ, IPFIX, gNMI streaming, DANZ
- Comprehensive security features and authenticated encryption support

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, and 10G via breakout
- 4x 400GbE QSFP-DD ports supporting 400G, 200G, and 100G
- Switching capacity: 4.8 Tbps full-duplex, non-blocking
- Forwarding rate: 2 Bpps (billion packets per second)
- Latency: From 3.8 microseconds store-and-forward
- Deep packet buffer: 8 GB VOQ architecture
- MAC address table: Up to 736,000 entries
- Routing capacity: Over 256K IPv4/IPv6 routes with FlexRoute (K-variant)
- CPU: Quad-core x86 processor
- Memory: Up to 64 GB DRAM standard
- Storage: 120 GB SSD
- Power: Dual hot-swappable 1000W AC power supplies (1+1 redundancy)
- Airflow: Rear-to-front (port side to fan side)
- Form factor: 1RU rackmount
- Management: 1x GbE management port, 1x RS-232 console port
- Operating system: Arista EOS

FAQs

Q: What is the difference between the CR3K and CR3 models?
A: The CR3K variant includes enhanced FlexRoute capabilities supporting over 256K routes (up to 5M with advanced profiles), significantly larger than standard CR3 models. This makes it ideal for Internet peering, carrier edge, and large-scale routing deployments.

Q: What does the FLX-R suffix indicate?
A: FLX indicates this model includes the FLX-Lite license for full routing capabilities with over 256K routes, EVPN, VXLAN, Segment Routing, and base MPLS LSR features. The R suffix denotes rear-to-front airflow, where cool air enters from the fan side and exhausts through the port side.

Q: Can the 400G QSFP-DD ports support lower speeds?
A: Yes, the QSFP-DD ports are flexible and support 400G, 200G, and 100G operation depending on the transceiver used. The 100G QSFP28 ports also support breakout to 50G, 40G, 25G, and 10G speeds.

Q: What network architectures is this switch designed for?
A: The 7280R3 series is purpose-built for cloud data centers, spine/leaf topologies, Internet peering, content delivery networks, IP storage networks, and data center interconnect applications requiring high-density 100G/400G and deep buffering.

Q: Does this model support Layer 3 routing protocols?
A: Yes, it supports full BGP routing (including MP-BGP), OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP-LU), Segment Routing, EVPN, VXLAN, and 512-way ECMP for advanced Layer 3 deployments and multi-path forwarding.

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