• 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 DCS-7804R3-FM is a fabric module for the Arista 7804 chassis in the 7800R3 modular data centre switch router family. Six modules are required per chassis and fill fabric slots 1-6, providing the cell-spraying switch fabric that interconnects the line cards and supervisors. It suits large-scale data centre spine and core, internet peering, data centre interconnect, and cloud and overlay networks built on the compact 4-slot 7804 chassis.

Each module draws 180 W typical and 248 W maximum, with typical power measured at 25C ambient and 50% load on all ports. It includes 4 user-serviceable fan modules and supports graceful degradation, so the fabric keeps passing traffic if a module is removed. A module measures 2.5 x 11.8 x 22.70 in (6.4 x 30 x 57.6 cm) and weighs 20 lbs (9.1 kg).

This module is for the DCS-7804 chassis only and is not interchangeable with the fabric modules for the 7808, 7812 or 7816 chassis. No licence is needed for the fabric module itself.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Part of the 7800R3 fabric, which uses cell-spraying for 100% efficiency
- Fully scheduled, lossless architecture with per-port virtual output queuing to eliminate head-of-line blocking
- Fabric module redundancy with graceful degradation
- Hot-swappable, with user-serviceable fan modules
- Front-to-rear airflow for data centre cooling
- 7800R3 platform supports 100G, 200G and 400G modes and is 800G ready
- Under 4 microsecond latency (64 bytes) on the 7800R3 platform

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

- Part number: DCS-7804R3-FM
- Product type: Fabric module for modular chassis switch
- Fits chassis: DCS-7804, 6 modules per chassis required
- Fabric slots: 1-6
- Redundancy: Graceful degradation supported
- Typical power: 180 W
- Maximum power: 248 W
- User-serviceable fans: Yes, 4 fan modules
- Dimensions (H x W x D): 2.5 x 11.8 x 22.70 in (6.4 x 30 x 57.6 cm)
- Weight: 20 lbs (9.1 kg)
- Host chassis supervisor slots: 2
- Host chassis line card slots: 4
- Host chassis fabric module slots: 6
- Host chassis power supply slots: 8 (24 KW max power budget)
- Host chassis maximum throughput: 115 Tbps / 24 Bpps
- Host chassis rack units: 10
- Operating temperature (7800R3 system): 0 to 40 C (32 to 104 F)
- Storage temperature (7800R3 system): -40 to 70 C (-40 to 158 F)
- Relative humidity (7800R3 system): 5 to 90%
- Operating altitude (7800R3 system): 0 to 10,000 ft (0-3,000 m)

FAQs

Q: How many of these fabric modules does a 7804 chassis need?
A: Six modules are required per chassis, one for each of fabric slots 1-6.

Q: Does the fabric module need its own licence?
A: No. The fabric module itself needs no licence. The host chassis runs Arista EOS, and any optional software feature licences apply at the chassis level.

Q: Which power supplies work with the 7804 chassis?
A: The 7804 chassis has 8 power supply slots with a 24 KW maximum power budget. Supported PSUs include PWR-D1-3041-AC, PWR-D2-3041-DC and PWR-D4-3041-AC. Each fabric module draws 180 W typical and 248 W maximum.

Q: Can I use it in a 7808, 7812 or 7816 chassis?
A: No. The DCS-7804R3-FM is for the DCS-7804 chassis only. The 7808, 7812 and 7816 chassis use their own fabric modules such as DCS-7808R3-FM, DCS-7812R3-FM and DCS-7816R3-FM.

Q: What happens if one fabric module fails or is removed?
A: The 7800R3 fabric supports graceful degradation, so the system continues to forward traffic with reduced fabric capacity rather than failing outright.

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