• Arista dcs-7289r3ak-sc 48-port 400g network switch card with sleek silver chassis and green-lit ports
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Arista

Arista DCS-7289R3AK-SC | 7280R3A 48-Port 400G Switch Card, 16GB Buffer, MACsec

DCS-7289R3AK-SC

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Description

The Arista DCS-7289R3AK-SC is a high-performance switch card designed for the 7289 modular chassis, delivering up to 48 ports of 400G connectivity across 9 I/O module slots with 16GB deep packet buffers for superior burst absorption. This large-scale R3AK variant includes enhanced MACsec encryption, internet-scale routing support up to 5M routes via FlexRoute, and hot-swappable fans. Ideal for data center spine deployments, content delivery networks, internet peering, and high-performance computing environments requiring lossless forwarding and deterministic performance.

Features

Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- 16GB deep packet buffers for lossless forwarding and superior burst absorption
- FlexRoute engine supports internet-scale routing up to 5 million IPv4 routes
- Enhanced MACsec and TunnelSec for line-rate AES-256 encryption
- Algorithmic ACLs for flexible and scalable access control and policy-based forwarding
- EVPN-VXLAN support for Layer 2 and Layer 3 overlay networking
- MPLS services including LDP, RSVP-TE, Segment Routing, and VPN services
- Up to 512-way ECMP for load balancing across large leaf-spine fabrics
- Hot-swappable fans and modular architecture for easy maintenance
- Precision timing with IEEE 1588v2 PTP and Synchronous Ethernet (SyncE)
- Advanced telemetry via Accelerated sFlow, IPFIX, and Inband Network Telemetry (INT)
- Arista EOS operating system with state sharing architecture and in-service software updates
- DANZ (Data ANalyZer) for comprehensive network visibility and monitoring
- Support for 400G-ZR DWDM optics for metro and long-haul connectivity
- Flexible interface support: 10G/25G SFP, 40G/100G QSFP, 400G QSFP-DD/OSFP

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

Switch Card Type: 7289R3AK-SC (Large Scale + Encryption variant)
- Maximum Ports: Up to 144x 25G SFP, 144x 100G QSFP, or 36x 400G QSFP-DD/OSFP (via 9 I/O module slots)
- System Throughput: 14.4 Tbps total (3.2 Tbps per I/O slot)
- Packet Buffer: 16GB deep packet buffers
- Forwarding Rate: Up to 5.4 billion packets per second
- Routing Scale: FlexRoute engine supports up to 5 million IPv4 routes
- Security: Enhanced MACsec line-rate encryption, TunnelSec support (AES-256)
- Architecture: Virtual Output Queue (VOQ) with non-blocking architecture
- Management: Arista EOS (Extensible Operating System) on 8-core CPU with 64GB RAM
- Form Factor: Modular switch card for 7289 chassis (4RU system)
- Cooling: Integrated hot-swappable fans included
- Chassis Compatibility: Arista 7289 Series modular chassis

FAQs

Q: What is the difference between R3A, R3AM, and R3AK switch cards?
A: The R3A is the standard switch card, the R3AM adds enhanced MACsec encryption, and the R3AK provides both enhanced MACsec encryption and large-scale routing resources supporting up to 5 million routes via FlexRoute engine, making it ideal for internet peering and MPLS applications.

Q: How many interface modules can I install with this switch card?
A: The DCS-7289R3AK-SC connects to 9 I/O module slots in the 7289 chassis, allowing flexible configurations of up to 36 ports of 400G, 144 ports of 100G, or 144 ports of 25G depending on the interface modules installed. Each module connects directly without oversubscription.

Q: What deployment scenarios is the 7289R3AK-SC best suited for?
A: This switch card excels in data center spine architectures, internet peering points requiring large routing tables, content delivery networks with high burst traffic, high-performance storage environments, data center interconnect with encryption requirements, and AI/ML clusters requiring deterministic low-latency performance.

Q: Does this switch card come with power supplies?
A: No, the DCS-7289R3AK-SC is a spare switch card that includes hot-swappable fans but does not include power supplies. The 7289 chassis supports up to 4 hot-swappable AC or DC power supplies which must be ordered separately.

Q: What advanced features does the R3AK variant support?
A: The R3AK supports Algorithmic ACLs for flexible policy enforcement, TunnelSec for strong encryption at Layer 2 and Layer 3, internet-scale routing with FlexRoute, EVPN-VXLAN overlay networking, Segment Routing, MPLS services, precision timing with PTP and SyncE, and advanced telemetry via Accelerated sFlow and Inband Network Telemetry.

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