• Silver-colored Arista DCS-7800R3-36P-LC rack-mounted network switches with 36 ports and ventilation slots visible
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Arista

Arista DCS-7800R3-36P-LC | 7800R3 36-Port 400GbE OSFP Wirespeed Line Card

DCS-7800R3-36P-LC

Stock Status: Enquire

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Description

The Arista DCS-7800R3-36P-LC is a high-performance line card designed for the 7800R3 Series modular data center switches. It features 36 ports of 400 Gigabit Ethernet using OSFP transceivers, with wirespeed forwarding and flexible port breakout options supporting 400G, 200G, 100G, and 50G speeds. Ideal for large-scale cloud data centers, internet peering, and spine deployments requiring maximum density and low-latency performance.

Features

Wirespeed forwarding across all 36x 400GbE OSFP ports with zero packet loss
- Deep buffer Virtual Output Queue (VOQ) architecture eliminates head-of-line blocking
- 100% efficient, non-blocking fabric connectivity in multi-slot chassis
- Distributed dataplane forwarding using Jericho2 packet processors
- FlexRoute engine for Internet-scale routing with millions of routes
- Comprehensive Layer 2 features: VLANs, STP/RSTP/MSTP, MLAG, LACP
- Advanced Layer 3 routing: OSPF, BGP, IS-IS, ECMP, VRF, IPv4/IPv6
- EVPN-VXLAN for data center network virtualization and multi-tenancy
- MPLS and Segment Routing for carrier-grade and WAN deployments
- Algorithmic ACLs for scalable access control and policy enforcement
- Line-rate Accelerated sFlow sampling for network telemetry and analytics
- MACsec encryption support for secure data center interconnect (DCI)
- Precision Time Protocol (PTP) for sub-microsecond time synchronization
- QoS with hierarchical scheduling, policing, and flexible queue management
- Hot-swappable design with front-to-rear airflow for high availability
- Integrated with Arista CloudVision for centralized management and streaming telemetry
- Supports full range of OSFP optics, copper DAC, and AOC cables

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

36x 400GbE OSFP ports with wirespeed forwarding
- Flexible port breakout: 1x400G, 2x200G, 4x100G, or 8x50G per port
- Supports OSFP form-factor optics, copper DAC, and AOC cables
- Virtual Output Queue (VOQ) architecture with deep buffers for lossless forwarding
- Compatible with Arista 7800R3 Series modular chassis (7804R, 7808R, 7812R, 7816R)
- Hot-swappable line card for continuous operations
- Front-to-rear airflow design
- Distributed packet processing with Jericho2 silicon
- Up to 45.6 Tbps fabric bandwidth per slot (full duplex)
- Layer 2 and Layer 3 forwarding with FlexRoute engine for Internet-scale routing
- Advanced features: EVPN, VXLAN, MPLS, Segment Routing, and Algorithmic ACLs
- Supports MACsec encryption, precision timing (PTP), and line-rate sFlow sampling
- Managed by Arista EOS (Extensible Operating System)
- Typical power consumption: ~25W per 400G port (excluding optics)

FAQs

Q: What chassis is the DCS-7800R3-36P-LC compatible with?
A: The DCS-7800R3-36P-LC line card is compatible with all Arista 7800R3 Series modular chassis, including the 7804R (4-slot), 7808R (8-slot), 7812R (12-slot), and 7816R (16-slot) systems. It supports hot-swappable installation and removal for maximum uptime.

Q: Can the 400G ports be broken out to lower speeds?
A: Yes, each of the 36 OSFP ports on the DCS-7800R3-36P-LC can be configured for flexible breakout, supporting 1x400G, 2x200G, 4x100G, or 8x50G interfaces per port. This allows you to optimize port density and speed based on your specific data center requirements.

Q: What software features does this line card support?
A: The line card supports the full Arista EOS feature set including Layer 2/3 switching and routing, EVPN-VXLAN network virtualization, MPLS and Segment Routing, FlexRoute for Internet-scale routing tables, Algorithmic ACLs, line-rate sFlow sampling, precision timing (PTP), and TunnelSec encryption. It is managed through Arista EOS and CloudVision.

Q: What is the typical power consumption of this line card?
A: The DCS-7800R3-36P-LC has a typical power consumption of approximately 25W per 400G port (measured at 25°C ambient with 50% load, excluding optics). Total line card power varies based on traffic load, environmental conditions, and installed transceivers.

Q: Does this line card support wirespeed forwarding?
A: Yes, the DCS-7800R3-36P-LC is a wirespeed line card, meaning all 36 ports can operate at full 400 Gigabit Ethernet line rate simultaneously without blocking. The Virtual Output Queue architecture ensures fair, lossless forwarding even under heavy congestion.

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