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Arista

Arista DCS-7800R3A-36DM2-LC | 7800R3A 36-Port 400G QSFP-DD Line Card, Enhanced MACsec

DCS-7800R3A-36DM2-LC

Stock Status: Enquire

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Description

The Arista DCS-7800R3A-36DM2-LC is a high-performance modular line card designed for large-scale data center spine and routing deployments. This 36-port 400GbE QSFP-DD line card features integrated CPU and Enhanced MACsec encryption capabilities, delivering up to 28.8 Tbps full-duplex bandwidth with AES-256-GCM encryption. Supporting Arista's TunnelSec technology, it enables line-rate MACsec, IPsec, and VXLANsec encryption across all interface speeds from 10G to 400G, making it ideal for secure data center interconnect and WAN applications.

Features

36x 400GbE QSFP-DD ports with support for 400G or 4x 100G breakout per port
- Enhanced MACsec encryption with Arista TunnelSec technology
- Line-rate AES-256-GCM encryption across all interface speeds (10G to 400G)
- Support for MACsec, IPsec, and VXLANsec encryption protocols
- Integrated CPU for advanced control plane processing
- FlexRoute engine for Internet-scale routing table support
- Algorithmic ACLs for flexible pattern matching and access control
- Accelerated sFlow and IPFIX for network forensics and telemetry
- Deep buffer Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- 100% lossless, non-blocking fabric architecture
- Advanced traffic scheduler with weighted fair queuing and priority queuing
- Hot-swappable modular design for high availability
- Compatible with all 7800R3 and 7800R3A Series line cards
- Layer 2 and Layer 3 switching and routing capabilities
- MPLS, Segment Routing, MLAG, ECMP, and EVPN-VXLAN support
- Comprehensive network monitoring and automation via Arista EOS

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

Form Factor: Modular line card for Arista 7800R Series chassis
- Port Configuration: 36x 400GbE QSFP-DD ports
- Bandwidth: 28.8 Tbps full-duplex (14.4 Tbps transmit + 14.4 Tbps receive)
- Port Speed Support: 400G, 4x 100G breakout per port
- Encryption: Enhanced MACsec with AES-256-GCM block cipher
- TunnelSec Support: IEEE 802.1AE MACsec, IPsec (RFC 4303), VXLANsec
- Encryption Speed: Line-rate encryption from 10G to 400G with no performance penalty
- Onboard CPU: Integrated CPU for enhanced control plane processing
- Buffer Architecture: Deep buffer Virtual Output Queue (VOQ) for lossless forwarding
- FlexRoute Engine: Internet-scale routing table support
- ACL Support: Algorithmic ACLs for pattern matching and access control
- Accelerated sFlow: Network visibility at 400G with no impact on forwarding
- Compatibility: Interoperates with all 7800R3 and 7800R3A Series line cards
- Management: Arista EOS (Extensible Operating System)
- Chassis Compatibility: 7804R, 7808R, 7812R, 7816R modular chassis

FAQs

Q: What encryption protocols does the DCS-7800R3A-36DM2-LC support?
A: This line card supports Enhanced MACsec via Arista's TunnelSec technology, including IEEE 802.1AE MACsec for layer 2 encryption, IPsec (RFC 4303) for layer 3 encrypted tunnels, and VXLANsec for overlay network encryption. All encryption uses AES-256-GCM and operates at full line rate from 10G to 400G without performance degradation. Encryption features require an EOS license.

Q: Is this line card compatible with other 7800R3 Series line cards?
A: Yes, the DCS-7800R3A-36DM2-LC is fully interoperable with all 7800R3 and 7800R3A Series line cards. The 7800R chassis can accommodate any combination of 7800R3 and 7800R3A line cards, providing flexibility in density, scale, and speed while maintaining consistent FlexRoute, Accelerated sFlow, and Algorithmic ACL capabilities across the platform.

Q: What is the difference between this model and the DCS-7800R3A-36D2-LC?
A: The DCS-7800R3A-36DM2-LC includes Enhanced MACsec encryption capabilities with TunnelSec support (MACsec, IPsec, VXLANsec), while the DCS-7800R3A-36D2-LC is a standard 36-port 400GbE line card without encryption features. Both include integrated CPUs and deliver the same 28.8 Tbps bandwidth. Choose the DM2 variant if you require hardware-based encryption for secure connectivity.

Q: What routing scale does this line card support?
A: The DCS-7800R3A-36DM2-LC supports Internet-scale routing through Arista's FlexRoute engine. For even larger routing table requirements exceeding 5 million routes, consider the DCS-7800R3AK-36DM2-LC variant which offers enhanced routing table capacity while maintaining all the same encryption and port capabilities.

Q: Does this line card ship ready to install in a chassis?
A: The DCS-7800R3A-36DM2-LC is typically supplied as a spare line card. For line cards that ship pre-installed in chassis configurations, look for the model suffix with '#' (DCS-7800R3A-36DM2-LC#). Verify your ordering requirements with your Arista partner to ensure the correct configuration for your deployment scenario.

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