• Silver-colored Arista DCS-7800R3K-36DM-LC rack-mounted network switches with 36-port 400G QSFP-DD line card and ventilation slots
1 1

Arista

Arista DCS-7800R3K-36DM-LC | 7800R3 36-Port 400G QSFP-DD Line Card, MACsec, 5M Routes

DCS-7800R3K-36DM-LC

Stock Status: Enquire

Request Quote
Sale Sold out
Taxes included. Shipping calculated at checkout.

Description

The Arista DCS-7800R3K-36DM-LC is a high-performance modular line card for the 7800R3 Series chassis, delivering 36 ports of 400GbE QSFP-DD connectivity with wirespeed MACsec encryption and advanced routing capabilities. This line card features large-scale routing table support for over 5 million routes, making it ideal for internet peering, data center interconnect, and hyperscale cloud spine deployments. With 14.4 Tbps full-duplex throughput, 16GB port buffer memory, and support for flexible port speeds from 10G to 400G, it provides the scalability and security required for next-generation data center architectures.

Features

36x 400GbE QSFP-DD ports with flexible speed options from 10G to 400G
- Virtual Output Queue (VOQ) architecture eliminating head-of-line blocking
- 16GB deep buffer memory with 40ms buffer per ingress port
- Wirespeed MACsec encryption on all ports with AES-256-GCM cipher
- FlexRoute engine supporting over 5 million IPv4 and IPv6 routes
- TunnelSec support for MACsec, IPsec, and VXLANsec
- Non-blocking architecture with 14.4 Tbps full-duplex bandwidth
- Support for VXLAN, EVPN, MPLS, and Segment Routing
- Advanced traffic scheduling with weighted fair queuing
- Algorithmic ACLs for scalable access control and policy enforcement
- Accelerated sFlow and IPFIX for network telemetry
- Integrated line card CPU for distributed processing
- Hot-swappable design with redundant fabric connectivity
- Compatible with industry-standard QSFP-DD optics and cables
- Precision timing and network synchronization support
- Arista EOS with zero-touch provisioning and CloudVision management

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.

View full details

specs-tabs

Technical Specifications

FAQs

Technical Specifications

Port Configuration: 36x 400GbE QSFP-DD ports
- Supported Speeds: 10G, 25G, 40G, 50G, 100G, 400G per port
- Maximum Interfaces: 232 interfaces with breakout cables
- Throughput: 14.4 Tbps full-duplex (28.8 Tbps)
- Port Buffer: 16 GB dedicated high-bandwidth packet memory
- Routing Scale: Supports over 5 million IP routes (FlexRoute)
- Encryption: TunnelSec MACsec on all ports (IEEE 802.1AE, AES-256-GCM)
- Architecture: Virtual Output Queue (VOQ) with deep buffers
- Line Card CPU: Integrated processor
- Typical Power Consumption: 578W (794W maximum)
- Dimensions: 18.9 x 2.1 x 17.8 inches (48.1 x 5.4 x 45.2 cm)
- Weight: 25.85 lbs (11.73 kg)
- Chassis Compatibility: 7804R, 7808R, 7812R, 7816R, 7816L
- Management: Arista EOS with CLI, SNMP, REST API
- Hot-Swappable: Yes

FAQs

Q: What chassis models support the DCS-7800R3K-36DM-LC line card?
A: This line card is compatible with all Arista 7800R3 Series chassis including the 7804R (4-slot), 7808R (8-slot), 7812R (12-slot), 7816R (16-slot), and 7816L models. It can be hot-swapped in any available line card slot with appropriate fabric and supervisor modules installed.

Q: What routing scale does this line card support?
A: The DCS-7800R3K-36DM-LC features large-scale routing capabilities supporting over 5 million IP routes in hardware using Arista's FlexRoute engine. This makes it suitable for internet peering, provider edge deployments, and large-scale data center spine applications requiring full BGP routing tables.

Q: Does this line card support encryption?
A: Yes, the line card includes TunnelSec MACsec capabilities on all 36 ports, providing wirespeed IEEE 802.1AE MACsec encryption using AES-256-GCM at line rate. It supports point-to-point layer 2 encryption without impacting forwarding performance, ideal for secure data center interconnect and cloud applications.

Q: What port breakout configurations are supported?
A: Each 400G QSFP-DD port can be configured for multiple speeds and breakout options including native 400G, 4x 100G, 8x 50G, or 8x 25G depending on transceiver and cabling. The line card supports up to 232 total interfaces when using breakout configurations with appropriate optics.

Q: What is the typical power consumption of this line card?
A: The DCS-7800R3K-36DM-LC has a typical power consumption of 578W at 25°C ambient with 50% port load, and a maximum power consumption of 794W under full load conditions. Power consumption excludes optics, which varies based on transceiver type and reach requirements.

Recently Viewed

  • Request a Quote

    Looking for competitive pricing? Submit a request, and our team will provide a tailored quote that fits your needs.

  • Contact Us Directly

    Have a question or need immediate assistance? Call us for expert advice and real-time support.

    Call us Now  

  • Contact Us Directly

    Have a question or need immediate assistance? Call us for expert advice and real-time support.

    Contact us