• Arista dcs-7289r3a-sc 9-slot modular switch card with sleek silver chassis and green-lit ports for high performance
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Arista

Arista DCS-7289R3A-SC | 7280R3A Switch Card, 9-Slot Modular, 16GB Buffer

DCS-7289R3A-SC

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Description

The Arista DCS-7289R3A-SC is a high-performance switch card designed for the 7289 modular chassis, delivering 3.2Tbps of capacity to each of 9 I/O module slots with 16GB deep packet buffers. This standard R3A variant supports up to 144 ports of 100G or 36 ports of 400G when fully configured with line cards, making it ideal for hyperscale data centers, service provider networks, and high-performance compute environments. The field-replaceable switch card includes integrated fans and operates with Arista EOS for advanced Layer 2 and Layer 3 routing.

Features

16GB deep packet buffer per switch card for superior burst absorption and lossless forwarding
- 3.2Tbps non-blocking capacity per I/O module slot with zero oversubscription
- FlexRoute engine for internet-scale routing with low power consumption
- Support for 9 hot-swappable line cards with mix-and-match flexibility (25G/100G/200G/400G)
- Virtual Output Queuing (VOQ) to eliminate head-of-line blocking
- Advanced Layer 2 features: MLAG, 256-way MLAG, VXLAN routing
- Layer 3 features: 512-way ECMP, BGP, OSPF, IS-IS, EVPN, MPLS
- Accelerated sFlow for granular network telemetry and traffic monitoring
- IEEE 1588 PTPv2 for sub-microsecond timing accuracy
- Full field-serviceability with hot-swappable fans, power supplies, and line cards
- Arista EOS with state-sharing architecture for in-service software upgrades
- CloudVision integration for network-wide automation and analytics
- Standards-based interfaces with comprehensive optics support
- NEBS-ready design with front-to-rear or rear-to-front airflow options
- Low latency under 4 microseconds for 64-byte packets

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

Product Type: Modular switch card for 7289 chassis
- System Capacity: 3.2Tbps per I/O module slot
- I/O Module Slots: 9 slots for line cards
- Packet Buffer: 16GB deep buffer for burst absorption
- Maximum Port Density: Up to 144x 100G or 36x 400G (with line cards)
- System Throughput: Up to 14.4Tbps total (full chassis)
- Packet Processing: Up to 5.4 billion packets per second
- Supported Interface Types: 25G SFP, 100G QSFP, 200G, 400G QSFP-DD/OSFP
- Supervisor: 8-core CPU with 64GB memory, 240GB SSD
- Cooling: Integrated hot-swappable fan modules
- Operating System: Arista Extensible Operating System (EOS)
- Form Factor: 4RU modular chassis component
- Airflow: Front to rear (depends on chassis configuration)
- Power: Hot-swappable AC or DC power supplies (chassis-level)
- Management: CLI, EOS Shell, CloudVision, NETCONF, JSON-RPC

FAQs

Q: What chassis is the DCS-7289R3A-SC compatible with?
A: The DCS-7289R3A-SC switch card is specifically designed for the Arista 7289 modular chassis. It connects to 9 I/O module slots and works with the supervisor module to deliver up to 14.4Tbps of system forwarding capacity in a 4RU form factor.

Q: What is the maximum port capacity with this switch card?
A: When fully populated with line cards, the 7289R3A-SC supports up to 144 ports of 100G, 36 ports of 400G, or 144 ports of 25G. Each I/O module connects directly to the switch card with 3.2Tbps of non-blocking bandwidth per slot.

Q: What line cards are compatible with the DCS-7289R3A-SC?
A: The switch card supports Arista 7280R3A series line cards including 16x 25G SFP, 16x 100G QSFP, 4x 400G QSFP-DD, and 4x 400G OSFP modules. These are hot-swappable and can be mixed within the same chassis for deployment flexibility.

Q: How does the R3A variant differ from R3AM and R3AK switch cards?
A: The R3A is the standard variant with core Layer 2/3 features and FlexRoute for internet-scale routing. The R3AM adds enhanced MACsec encryption, while the R3AK includes large route scale (5M+ routes), TunnelSec encryption, and Algorithmic ACLs for advanced service provider deployments.

Q: What typical use cases is this switch card designed for?
A: The DCS-7289R3A-SC is designed for high-performance data center spine and leaf deployments, internet peering, content delivery networks, IP storage, cloud fabric aggregation, and AI/ML infrastructure requiring ultra-low latency and deep buffering for lossless traffic engineering.

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