• 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 7816L Chassis, 16 Fans

DCS-7816LR4-FM

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Description

This fabric module is built for the Arista 7816L 16-slot chassis in the 7800R4 AI spine platform. It interconnects every line card in a non-blocking, cell-based architecture, making it the fabric backbone for single-tier or spine deployments carrying AI/ML and HPC clusters, as well as large data centre and service provider routing.

The module installs in fabric slots 1-5 of the 7816L and includes 16 user-serviceable fan modules for flexible, redundant cooling. Fabric operation is always active-active with graceful degradation, and the module is hot-swappable. It measures 2.5 x 43.3 x 23.7 in (6.4 x 109.9 x 60.1 cm) and weighs 72.2 lbs (32.75 kg). The 7816L chassis it serves delivers 460 Tbps system throughput (920 Tbps FDX) with density up to 576 x 800G or 4608 x 100G.

It is used with the DCS-7816L chassis only. It works with 7800R4C-36PE, 7800R4-36PE and 7800R4K-36PE line cards and the DCS-7816-SUP1S and DCS-7816-SUP2 supervisor modules. Slot 6 of the chassis requires the DCS-7816L-FCM fabric cooling module.

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

Features

- Interconnects all line cards in a non-blocking architecture irrespective of traffic
- Cell-based fabric sprays data across all fabric links for efficient connectivity with no hash-based link selection
- Always active-active with graceful degradation and hot-swap capability
- Individually serviceable fans for flexible and redundant cooling
- Mid-plane-less design gives direct, consistent connectivity from all line cards to all fabric modules
- Supports fully scheduled, lossless VOQ forwarding for AI/ML and HPC clusters
- Existing 7800R3 systems can be upgraded to 7800R4 specification with R4 fabric modules and line cards

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

- Chassis support: DCS-7816L (fabric slots 1-5)
- Product type: Switch fabric module
- Redundancy: Graceful degradation supported
- User-serviceable fans: Yes (16 fan modules)
- Dimensions (HxWxD): 2.5 x 43.3 x 23.7 in (6.4 x 109.9 x 60.1 cm)
- Weight: 72.2 lbs (32.75 kg)
- Fabric module slots per 7816L chassis: 6 (5 x FM-R4 plus 1 x fabric cooling module in slot 6)
- 7816L chassis system throughput: 460 Tbps (920 Tbps FDX)
- 7816L maximum density: 576 x 800G, 1152 x 400G, 4608 x 100G
- System operating temperature: 0 to 40 C (32 to 104 F)
- System storage temperature: -40 to 70 C (-40 to 158 F)
- System relative humidity: 5 to 90%
- System operating altitude: 0 to 10,000 ft (0-3,000 m)

FAQs

Q: Which chassis does this fabric module fit?
A: It fits the Arista DCS-7816L 16-slot chassis only, in fabric slots 1-5. Slot 6 requires the DCS-7816L-FCM fabric cooling module.

Q: Which line cards and supervisors does it work with?
A: It works with 7800R4C-36PE, 7800R4-36PE and 7800R4K-36PE line cards, and with the DCS-7816-SUP1S and DCS-7816-SUP2 supervisor modules for the 7816L chassis.

Q: Can it be hot-swapped?
A: Yes. The fabric operates active-active with graceful degradation and supports hot-swap, so a module can be replaced without taking the whole chassis offline.

Q: Can I upgrade an existing 7800R3 system with it?
A: Yes. Existing 7800R3 systems can be brought up to 7800R4 specification by fitting R4 fabric modules together with R4 line cards.

Q: How is cooling handled on this module?
A: It includes 16 user-serviceable fan modules, which can be serviced individually for flexible and redundant cooling.

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