• Silver-colored arista dcs-7804r3-fm rack-mounted network switches with port grid and ventilation slots for 7804 chassis
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Arista

Arista DCS-7804R3-FM | 7800R3 Fabric Module for 7804 Chassis, Slots 1-6

DCS-7804R3-FM

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Description

The Arista DCS-7804R3-FM is a fabric module designed for the 7804R3 modular data center chassis. Six fabric modules are required for fabric slots 1-6 to enable full system throughput and redundancy in the 7804R3 switch. This component is essential for high-performance data center environments requiring scalable Layer 2 and Layer 3 connectivity.

Features

High-speed fabric interconnect for 7804R3 modular chassis
- Supports up to 460 Tbps of system throughput in the 7800R3 series
- Graceful degradation redundancy for high availability
- Hot-swappable and user-serviceable for zero-downtime maintenance
- Front-to-rear airflow design optimized for data center deployments
- Midplane-less architecture for direct line card to fabric module connection
- Supports advanced features including VXLAN, EVPN, MPLS, and deep packet buffers
- Compatible with Arista EOS for unified network management
- Designed for large-scale layer 2 and layer 3 cloud and enterprise 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
- Compatibility: Arista 7804R3 Chassis only
- Required Slots: Fabric slots 1-6 (six modules required per chassis)
- Dimensions (HxWxD): 2.5" x 11.8" x 22.7" (6.4 x 30 x 57.6 cm)
- Typical Power Consumption: 681W (Max 917W)
- Redundancy: Supports graceful degradation
- Airflow: Front-to-rear
- Chassis Support: Designed for 7804 chassis in the 7800R3 Series
- Hot-Swappable: Yes, user-serviceable
- Management: Controlled by supervisor module running Arista EOS

FAQs

Q: How many DCS-7804R3-FM fabric modules are required for the 7804R3 chassis?
A: Six fabric modules are required to populate fabric slots 1-6 in the 7804R3 chassis for full system operation. The modules support graceful degradation for redundancy.

Q: Is the DCS-7804R3-FM compatible with other Arista 7800 series chassis?
A: No, the DCS-7804R3-FM is designed specifically for the 7804R3 chassis. Other chassis in the 7800R3 series, such as the 7808, 7812, and 7816, require their own corresponding fabric modules.

Q: What is the role of a fabric module in the 7804R3 chassis?
A: Fabric modules provide the high-speed backplane interconnect between line cards and supervisor modules, enabling the switch to deliver maximum system throughput and support advanced features like VXLAN, EVPN, and deep packet buffering.

Q: Can fabric modules be replaced while the chassis is operating?
A: Yes, fabric modules in the 7800R3 series are user-serviceable and hot-swappable. The system supports graceful degradation, allowing operation to continue during module replacement, though at reduced performance.

Q: What power requirements should I consider when deploying fabric modules?
A: Each DCS-7804R3-FM consumes approximately 681W typical power (up to 917W maximum). When planning power for the full chassis, account for all six fabric modules plus supervisor modules, line cards, and fans.

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