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Arista

Arista DCS-7800R3A-36D2-LC | 7800R3A 36-Port 400GbE QSFP-DD Line Card with CPU

Arista DCS-7800R3A-36D2-LC | 7800R3A 36-Port 400GbE QSFP-DD Line Card with CPU

DCS-7800R3A-36D2-LC

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Description

The Arista 7800R3A Series 36-port 400GbE QSFP-DD line card with CPU is a high-density, high-performance modular line card designed for deployment in Arista 7800R3A series chassis-based switches. Engineered for hyperscale data centre and large enterprise core networks, this line card delivers 36 ports of 400 Gigabit Ethernet via QSFP-DD interfaces, enabling massive bandwidth aggregation and ultra-low latency forwarding at scale. The integrated CPU provides dedicated processing capability for advanced control-plane functions, supporting demanding workloads including AI/ML fabric interconnects, high-frequency trading, and large-scale cloud infrastructure.

As a direct line card module for the Arista 7800R3A modular chassis, this card integrates seamlessly with Arista EOS (Extensible Operating System), supporting advanced L2/L3 features, segment routing, VXLAN, and comprehensive network telemetry via Arista's CloudVision platform. Compatible with industry-standard 400G, 100G, and 40G QSFP-DD optics and DAC/AOC cables, it offers deployment flexibility across diverse data centre architectures. Upgrade your network with gear from iptrading.com.au — Australia's IT hardware specialists.

Features

- 36 x 400GbE QSFP-DD ports delivering exceptional port density for hyperscale data centre deployments
- Integrated CPU enables advanced per-card control-plane processing and faster network convergence
- Full Arista EOS support including L2/L3 routing, VXLAN, EVPN, and segment routing
- Compatible with Arista CloudVision for centralised management, automation, and streaming telemetry
- Supports breakout configurations allowing 400G ports to operate as multiple lower-speed interfaces
- Designed for AI/ML fabric interconnects, high-frequency trading, and cloud-scale infrastructure
- Hot-swappable modular design allows non-disruptive installation and replacement in the 7800R3A chassis
- Backward-compatible with existing 100G and 40G QSFP-DD optics for phased migration strategies
- Wire-rate forwarding at 400GbE across all ports with ultra-low and deterministic latency
- Comprehensive QoS, ACL, and security policy enforcement at line rate

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Form Factor: Modular line card for Arista 7800R3A Series chassis
- Port Count: 36 x 400GbE QSFP-DD ports
- Port Compatibility: Supports 400G, 100G, and 40G QSFP-DD optics, DAC, and AOC cables
- Integrated CPU: Dedicated on-card CPU for control-plane processing
- Interface Type: QSFP-DD (Quad Small Form-factor pluggable Double Density)
- Total Line Card Bandwidth: Up to 14.4 Tbps aggregate
- Platform: Compatible with Arista 7800R3A modular chassis
- Operating System: Arista EOS (Extensible Operating System)
- Switching Architecture: Distributed forwarding with centralised control
- Standards Compliance: IEEE 802.3bs (400GbE), IEEE 802.3cd (100GbE)

FAQs

Q: What chassis is the DCS-7800R3A-36D2-LC compatible with?
A: The DCS-7800R3A-36D2-LC is a line card designed specifically for the Arista 7800R3A Series modular chassis. It is not compatible with other Arista chassis families such as the 7500R or 7800R2 platforms.

Q: What is the significance of the integrated CPU on this line card?
A: The on-board CPU provides dedicated processing for control-plane and management functions at the line card level, enabling faster convergence, enhanced per-card autonomy, and support for more complex routing and telemetry operations without burdening the chassis supervisor.

Q: What optics and cable types are supported on the 36 QSFP-DD ports?
A: The QSFP-DD ports support 400GbE, 100GbE, and 40GbE transceiver modules, as well as Direct Attach Copper (DAC) and Active Optical Cables (AOC), providing flexibility for both short-reach intra-rack and longer inter-rack connectivity.

Q: Is this line card suitable for AI and machine learning network fabrics?
A: Yes. The 7800R3A platform with 400GbE line cards like this one is purpose-built for ultra-high-bandwidth, low-latency environments including AI/ML compute clusters, hyperscale data centres, and high-performance computing (HPC) interconnects.

Q: Can I purchase the DCS-7800R3A-36D2-LC in Australia from IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware specialist and can supply Arista data centre switching products including this line card. Contact the team for availability, pricing, and lead times tailored to your project.

Q: Does this line card support Arista CloudVision and network telemetry?
A: Yes. Running Arista EOS, the DCS-7800R3A-36D2-LC supports full integration with Arista CloudVision for centralised network management, streaming telemetry, and automation workflows, making it suitable for modern intent-based networking deployments.

Datasheet

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