• Silver rack-mounted arista dcs-7800r3a-36p-lc network switches with 400gbe ports and ventilation slots on the back side
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Arista

Arista DCS-7800R3A-36P-LC | 7800R3A 36-Port 400GbE OSFP Line Card, 14.4 Tbps

DCS-7800R3A-36P-LC

Stock Status: Enquire

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Description

The Arista DCS-7800R3A-36P-LC is a high-performance modular line card designed for large-scale data center spine and aggregation deployments. Featuring 36 ports of 400GbE OSFP with flexible breakout capabilities, this line card delivers 14.4 Tbps of switching capacity with deep buffer VOQ architecture for lossless forwarding. Advanced features include FlexRoute for internet-scale routing, Accelerated sFlow for network telemetry, and compatibility with the full Arista 7800R Series chassis family.

Features

36 x 400GbE OSFP ports with multi-speed breakout support
- Deep buffer VOQ architecture for lossless, 100% efficient forwarding
- FlexRoute engine for internet-scale IP routing
- Accelerated sFlow for line-rate network telemetry and visibility
- Algorithmic ACLs for flexible pattern matching and policy-based forwarding
- TunnelSec support: IPsec and VXLANsec line-rate encryption (AES-256-GCM)
- Full Layer 2 and Layer 3 feature set with MPLS, Segment Routing, EVPN-VXLAN
- MLAG, ECMP, and VXLAN overlay support
- Hot-swappable design with redundant power and fabric
- Compatible with all 7800R3 Series line cards for flexible density options
- Arista EOS software for advanced automation and programmability
- Low power consumption: ~25W per 400G port

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

36 x 400GbE OSFP ports
- Port breakout: 1x400G, 2x200G, 4x100G, or 8x50G per port
- Switching capacity: 14.4 Tbps per line card
- Port buffer: 16 GB deep buffer VOQ architecture
- Connector type: OSFP form factor
- Typical power consumption: ~25W per 400G port at 50% load (excludes optics)
- Operating temperature: 0°C to 40°C
- Compliance: IEEE 802.3bs (400G Ethernet)
- Chassis compatibility: Arista 7800R Series (4, 8, 12, 16-slot)
- Hot-swappable line card design

FAQs

Q: What chassis models are compatible with the DCS-7800R3A-36P-LC?
A: This line card is compatible with all Arista 7800R Series modular chassis, including 4-slot, 8-slot, 12-slot, and 16-slot configurations. It can be mixed with other 7800R3 and 7800R3A line cards in the same chassis.

Q: What is the difference between 7800R3A and 7800R3 line cards?
A: The 7800R3A series adds support for Arista TunnelSec encryption technologies including IPsec and VXLANsec for line-rate encrypted tunnels, in addition to all the FlexRoute and Accelerated sFlow features of the standard 7800R3 line cards.

Q: Can the 400G ports be broken out to lower speeds?
A: Yes, each OSFP port supports flexible breakout configurations: 1x400G, 2x200G, 4x100G, or 8x50G per port, allowing deployment flexibility for mixed-speed environments and seamless migration paths.

Q: What encryption capabilities does this line card support?
A: The DCS-7800R3A-36P-LC supports TunnelSec encryption including IPsec and VXLANsec for line-rate encrypted IP tunnels across WAN or DCI deployments, using AES-256-GCM encryption at full line rate.

Q: What routing scale does the 7800R3A support?
A: The 7800R3A line card supports FlexRoute for internet-scale routing tables, Algorithmic ACLs for flexible access control, and Accelerated sFlow for high-density network telemetry. For routing tables exceeding 5 million routes, the 7800R3AK variant is available.

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