• Silver-colored arista dcs-7816lr4-fm rack-mounted fabric module with ports and ventilation slots for 7816l chassis back side
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Arista

Arista DCS-7816LR4-FM | 7800R4 Fabric Module for 7816L Chassis, Slots 1-5

Arista DCS-7816LR4-FM | 7800R4 Fabric Module for 7816L Chassis, Slots 1-5

DCS-7816LR4-FM

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Description

The 7800R4 Series Fabric Module for the Arista 7816L chassis delivers high-density, non-blocking cell-based switching fabric at 460 Tbps (920 Tbps full duplex) across the 16-slot platform. Required for fabric slots 1–5, this module enables active-active interconnection between all installed line cards, making it essential for AI/ML accelerated compute fabrics, hyperscale data centres, and service provider backbone deployments demanding zero-compromise throughput and availability.

Supporting hot-swap replacement and individually serviceable fans, the DCS-7816LR4-FM ensures continuous operation during maintenance without planned downtime. It is compatible with 7800R4 line cards supporting 800G and 400G interfaces, and existing 7800R3 installations can be upgraded to R4 specification by deploying R4 fabric modules. Buy today from iptrading.com.au — fast shipping and expert service across Australia.

Features

- Non-blocking cell-based fabric architecture mitigates elephant and mice flow congestion
- Active-active fabric redundancy — no single point of failure across fabric slots
- Hot-swappable design enables live replacement with zero planned downtime
- Individually serviceable fans provide modular, redundant cooling per fabric module
- Supports 7800R4 line cards with 800G and 400G interface capabilities
- Virtual Output Queues (VOQ) and Distributed Credit Scheduling for lossless fabric performance
- Works in conjunction with dedicated Fabric Cooling Module (FCM) in slot 6
- Upgrade path available for existing 7800R3 chassis deployments
- Suited for AI/ML compute fabrics, data centre spine, and service provider backbone

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Compatible Chassis: Arista 7816L (16-slot)
- Required for Fabric Slots: 1–5 (slot 6 reserved for Fabric Cooling Module)
- Total Fabric Module Slots per 7816L Chassis: 6
- System Fabric Capacity: 460 Tbps (920 Tbps full duplex)
- Fabric Architecture: Cell-based, 100% non-blocking
- Redundancy: Active-active fabric module operation
- Hot-Swap: Supported for live replacement without downtime
- Cooling: Individually serviceable fans per module
- Power Infrastructure: Supports AC or DC
- Supported Interface Speeds: 800G and 400G (via R4 line cards)
- Warranty: 1-Year Limited Hardware Warranty (10 business day turnaround); optional NBD and 4-Hour Advance Hardware Replacement available

FAQs

Q: How many DCS-7816LR4-FM fabric modules does the 7816L chassis require?
A: The Arista 7816L chassis has six fabric module slots in total. The DCS-7816LR4-FM occupies fabric slots 1–5, while slot 6 is reserved exclusively for the Fabric Cooling Module (FCM). A fully populated chassis therefore requires five DCS-7816LR4-FM modules.

Q: Can I replace a fabric module while the chassis is running?
A: Yes. The DCS-7816LR4-FM is fully hot-swappable, allowing you to remove and replace an individual fabric module without taking the chassis offline. The active-active fabric architecture maintains forwarding continuity across the remaining modules during the swap.

Q: Is the DCS-7816LR4-FM compatible with existing 7800R3 deployments?
A: Yes. Existing 7800R3 chassis can be upgraded to the R4 specification by installing 7800R4 fabric modules. This upgrade path allows organisations to leverage higher-capacity R4 line cards supporting 800G and 400G interfaces within their current chassis investment.

Q: What switching capacity does the 7816L platform deliver with R4 fabric modules?
A: With five DCS-7816LR4-FM modules installed, the Arista 7816L platform delivers a total system fabric capacity of 460 Tbps (920 Tbps full duplex), achieved through a cell-based non-blocking architecture with Virtual Output Queues (VOQ) and Distributed Credit Scheduling.

Q: What workloads is the 7800R4 fabric module designed for?
A: The 7800R4 Series is purpose-built for AI/ML accelerated compute fabrics, hyperscale data centre spine layers, and service provider backbone networks. The cell-based fabric architecture specifically mitigates congestion caused by elephant and mice flow interactions, which are common in GPU-to-GPU traffic patterns.

Q: Can I purchase the Arista DCS-7816LR4-FM in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) supplies Arista 7800R4 Series fabric modules and chassis components to businesses across Australia, with fast shipping and expert pre-sales and post-sales support. Contact the team for volume pricing or project-based procurement assistance.

Datasheet

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