• Silver-colored rack-mounted arista dcs-7816r3-fm fabric module with grid of ports and ventilation slots side view
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Arista

Arista DCS-7816R3-FM | 7800R3 Fabric Module for 7816 Chassis, Slots 1-12

DCS-7816R3-FM

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Description

This fabric module is a core component of the Arista 7800R3 Series modular data centre switch and router family. It is built for the 16-slot DCS-7816 chassis and provides the cell-spraying fabric that interconnects the line cards and supervisor modules. It suits large-scale data centre spine, cloud and internet peering, and carrier-edge routing deployments.

The DCS-7816R3-FM is used in fabric slots 1-12, and twelve modules are required per chassis. A fully populated 7816 delivers 230 Tbps (460 Tbps FDX) of fabric capacity, up to 96 Bpps, and supports up to 576 wire-speed 400G ports. Each module draws 510 W typical and 778 W maximum, measured at 25 C ambient with 50% load on all ports, and is powered from the chassis backplane. It measures 2.5 x 21 x 16.4 inches and weighs 32 lbs (14.5 kg). Graceful degradation is supported if a module fails, and the user-serviceable fan modules are front-to-rear cooled.

This module is for the DCS-7816 chassis only. The 7816L, 7812, 7808 and 7804 chassis use different fabric modules (DCS-7816LR3-FM, DCS-7812R3-FM, DCS-7808R3-FM/FM2 and DCS-7804R3-FM respectively). It works with 7800R3 series line cards and the DCS-7800-SUP supervisor module.

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

Features

- Cell-spraying fabric for 100% efficiency
- Fully scheduled, lossless architecture with credit control and per-port Virtual Output Queuing
- Graceful degradation supported if a fabric module fails
- Hot-swappable fabric modules with user-serviceable fan modules
- Front-to-rear airflow for data centre cooling
- Supports up to 576 wire-speed 400G ports in a fully populated 7816 chassis

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-7816R3-FM
- Type: Fabric module for modular switch chassis
- Chassis support: DCS-7816 only
- Fabric slots: 1-12 (12 modules required per chassis)
- Typical power: 510 W (measured at 25 C ambient, 50% load on all ports)
- Maximum power: 778 W
- Dimensions (H x W x D): 2.5 x 21 x 16.4 in (6.4 x 53.3 x 41.6 cm)
- Weight: 32 lbs (14.5 kg)
- Redundancy: graceful degradation supported
- User-serviceable fans: yes (8 fan modules)
- Chassis fabric capacity: 230 Tbps (460 Tbps FDX), up to 96 Bpps with 12 modules
- Chassis line card slots (DCS-7816): 16
- Chassis supervisor slots (DCS-7816): 2
- 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 3,000 m (0 to 10,000 ft)
- Airflow (7800R3 system): front-to-rear

FAQs

Q: Which chassis does the DCS-7816R3-FM fit?
A: It is for the Arista DCS-7816 chassis only. The 7816L, 7812, 7808 and 7804 chassis use DCS-7816LR3-FM, DCS-7812R3-FM, DCS-7808R3-FM/FM2 and DCS-7804R3-FM respectively.

Q: How many fabric modules does a 7816 chassis need?
A: Twelve are required per chassis, one for each of fabric slots 1-12. The chassis fabric capacity of 230 Tbps is quoted with all 12 installed.

Q: How is the fabric module powered?
A: It is powered from the 7816 chassis backplane and has no power supply of its own. Each module draws 510 W typical and 778 W maximum, so the chassis power supplies must be sized to suit.

Q: Does the fabric module need a licence?
A: No licence is stated for the fabric module itself. Arista EOS features on the 7800R3 system may carry separate software licences.

Q: Which line cards and supervisors does it work with?
A: It works with 7800R3 series line cards and the DCS-7800-SUP supervisor module in the DCS-7816 chassis.

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