• Silver-colored arista dcs-7816lr4-fm rack-mounted network switches with 16 fans and ventilation slots on the back side
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Arista

Arista DCS-7816LR4-FM | 7800R4 Fabric Module for DCS-7816L, 16 Fans

DCS-7816LR4-FM

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Description

The Arista DCS-7816LR4-FM is a high-capacity fabric module designed specifically for the DCS-7816L modular chassis, providing critical interconnect bandwidth for data center spine and AI infrastructure deployments. This module supports graceful degradation for reliability and includes 16 user-serviceable fan modules. Engineered for demanding environments requiring ultra-high throughput and redundancy in large-scale leaf-spine architectures.

Features

Graceful degradation for high availability and fault tolerance
- 16 user-serviceable fan modules for optimized cooling and field maintenance
- Designed for ultra-high bandwidth fabric connectivity in modular spine switches
- Optimized for AI/ML training networks and large-scale data center deployments
- Front-to-rear airflow design for efficient thermal management
- Supports modular upgrade path from 7800R3 to 7800R4 architectures
- Compatible with 800GbE OSFP line cards for maximum throughput
- Engineered for 512-way ECMP and wire-speed gateway performance
- Supports VXLAN, EVPN, and DCI overlay networks

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

Product Type: Fabric Module for modular switches
- Compatible Chassis: DCS-7816L (installs in slots 1-5)
- Redundancy: Graceful degradation supported
- Dimensions (H x W x D): 2.5 in x 43.3 in x 23.7 in (6.4 x 109.9 x 60.1 cm)
- Weight: 72.2 lbs (32.75 kg)
- Typical Power Consumption: TBD
- Maximum Power Consumption: TBD
- Fan Modules: 16 user-serviceable fan modules
- Module Slots Required: 1 slot per fabric module; 5 modules recommended for full redundancy
- Operating Temperature: Data center optimized with front-to-rear airflow

FAQs

Q: What chassis is the DCS-7816LR4-FM compatible with?
A: The DCS-7816LR4-FM fabric module is designed exclusively for the Arista DCS-7816L modular chassis and installs in fabric module slots 1 through 5.

Q: How many fabric modules are needed for the DCS-7816L chassis?
A: The DCS-7816L chassis supports up to 6 fabric module slots. For redundancy and full performance, 5 fabric modules are typically deployed to ensure graceful degradation in case of module failure.

Q: Can this fabric module be hot-swapped?
A: Yes, the DCS-7816LR4-FM supports graceful degradation, allowing for replacement without full system shutdown. The 16 user-serviceable fan modules can also be serviced individually.

Q: What is the difference between R3 and R4 fabric modules?
A: The R4 fabric modules represent the latest generation with enhanced throughput and support for higher-density line cards, particularly for 800GbE deployments and AI/ML workloads. Existing 7800R3 systems can be upgraded to R4 specifications.

Q: Is this module suitable for AI spine networks?
A: Yes, the DCS-7816LR4-FM is part of the Arista 7800R4 Series AI Spine platform, purpose-built for high-performance, lossless connectivity in AI training clusters and backend networks requiring deterministic performance under full load.

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