• Gray metal arista dcs-7280cr3k-36a-r 36-port 100g network switch with ventilation slots shown from the back side
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Arista

Arista DCS-7280CR3K-36A-R | 7280R3 36-Port 100G Switch, 2x 400G, 7.2 Tbps

DCS-7280CR3K-36A-R

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Description

The Arista DCS-7280CR3K-36A-R is a high-performance 1RU data center switch router designed for cloud networks, content delivery, and high-speed IP peering applications. Featuring 36 ports of 100 Gigabit Ethernet and 2 ports of 400 Gigabit Ethernet, it delivers 7.2 Tbps of non-blocking throughput with deep packet buffering and FlexRoute technology supporting over 5 million routes. The rear-to-front airflow configuration is optimized for hot aisle/cold aisle data center deployments.

Features

Full Layer 2 and Layer 3 switch router with wire-speed forwarding
- FlexRoute engine with internet-scale routing table support (5M+ routes)
- 8 GB deep packet buffer with Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP LU), Segment Routing
- VXLAN routing and bridging with EVPN control plane
- 512-way Equal Cost Multi-Path (ECMP) for load balancing
- Multi-Chassis Link Aggregation (MLAG) for active-active redundancy
- Algorithmic ACLs supporting 100,000+ rules with pattern matching
- Precision Time Protocol (PTP) IEEE 1588v2 for time synchronization
- sFlow and NetFlow/IPFIX for comprehensive traffic visibility
- Zero Touch Provisioning (ZTP) for automated deployment
- CloudVision integration for centralized management and telemetry
- Arista EOS with eAPI (JSON-RPC) for programmability and automation
- Hot-swappable redundant power supplies and fan modules
- MACsec encryption support for Layer 2 security (check model variant)
- RoHS compliant with comprehensive safety and EMI certifications

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

36x 100GbE QSFP28 ports (28x 100G base + 6x 200G capable + 2x 400G QSFP-DD uplinks)
- Switching Capacity: 7.2 Tbps full-duplex, non-blocking
- Forwarding Rate: 2.8 Bpps (billion packets per second)
- Memory: 64 GB DRAM, 120 GB SSD storage
- Processor: Quad-core x86 CPU
- Deep Packet Buffer: 8 GB with Virtual Output Queue (VOQ) architecture
- Latency: Starting from 3.8 microseconds (store-and-forward)
- Routing Scale: Over 5 million IPv4 routes, 5 million IPv6 routes (FlexRoute engine)
- MAC Address Table: 384,000 entries
- Power Supply: Dual hot-swappable 1000W AC/DC PSU (1+1 redundant)
- Typical Power Consumption: Approximately 900W
- Dimensions: 48.3 x 4.4 x 47.2 cm (1RU, 19-inch rack-mountable)
- Weight: 10.5 kg
- Airflow: Rear-to-front (back-to-front) for hot aisle exhaust
- Management: 1x 100/1000 Mbps out-of-band Ethernet, 1x RS-232 console port
- Operating Temperature: 0°C to 40°C
- Certifications: RoHS, UL, CSA, CE, IEC/EN, FCC, EMI/EMC compliant

FAQs

Q: What is the difference between the DCS-7280CR3K-36A-R and -F models?
A: The -R suffix indicates rear-to-front airflow (intake from port side, exhaust from rear), while the -F model has front-to-rear airflow. The -R model is designed for hot aisle deployments where warm air exhausts toward the back of the rack.

Q: Can the 36 ports be configured at different speeds?
A: Yes, the ports support flexible breakout configurations. The 28 base QSFP28 ports can run at 100G, 50G, 40G, 25G, or 10G. Six ports support 200G operation, and two QSFP-DD uplink ports support 400G, 200G, or 100G line rates.

Q: Does this switch support internet-scale BGP routing tables?
A: Yes, the K-variant includes Arista's FlexRoute engine with large route table support, scaling to over 5 million IPv4 routes and 5 million IPv6 routes in hardware, making it suitable for internet peering, service provider edge, and DCI applications.

Q: What network virtualization and overlay protocols are supported?
A: The 7280R3 supports VXLAN routing and bridging, EVPN control plane, MPLS with LDP and RSVP-TE, Segment Routing, BGP Labeled Unicast, and 512-way ECMP for advanced multi-tenant and overlay network architectures.

Q: Is software licensing required for full Layer 3 functionality?
A: Arista EOS includes comprehensive Layer 2 and Layer 3 features, advanced routing protocols, and automation capabilities as part of the base software. No additional feature licenses are required to enable BGP, OSPF, MPLS, or VXLAN functionality.

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