• Silver-colored arista dcs-7816lr4-bnds-u-dc rack-mounted 16-slot modular ai spine switch chassis back side with ports
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Arista

Arista DCS-7816LR4-BNDS-U-DC | 7800R4 16-Slot Modular AI Spine Switch Chassis Bundle

Arista DCS-7816LR4-BNDS-U-DC | 7800R4 16-Slot Modular AI Spine Switch Chassis Bundle

DCS-7816LR4-BNDS-U-DC

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Description

The Arista 7800R4 Series 7816LR4 is a 16-slot modular AI spine switch chassis bundle purpose-built for hyperscale AI/ML, HPC, and large-scale data centre spine deployments. This DC-powered bundle delivers a staggering 460 Tbps (920 Tbps FDX) fabric capacity with support for up to 576 x 800GbE or 1152 x 400GbE ports at full line card fill — making it one of the most powerful spine switching platforms available for back-end AI cluster networks. The bundle ships complete with the 7816L chassis, 12 x 3kW D2 DC power supplies, 5 x FM-R4 fabric modules, 1 x Fabric Cooling Module, 1 x 7800-Sup1S supervisor with Secure Boot enabled, and an extended rack kit, ready for rapid deployment in a 32RU form factor.

Running Arista EOS with the full Etherlink® suite — including DCQCN, PFC, and ECN optimised for RDMA workloads — the 7816LR4 delivers 100% internally lossless, cell-based fabric with Virtual Output Queue (VOQ) architecture that eliminates head-of-line blocking at scale. It supports EVPN/VXLAN, MPLS, Segment Routing, wire-speed breakout to 25G through 400G, and forklift-free upgradability from the 7800R3 Series. Backed by a 1-Year Limited Hardware Warranty with optional Next Business Day and 4-Hour Advance Hardware Replacement. Get it now at iptrading.com.au — authentic hardware, reliable service.

Features

- Purpose-built for AI/ML and HPC cluster interconnect — optimised as a single-tier or spine switch in two-tier back-end AI fabric networks
- Arista Etherlink® suite with DCQCN, PFC, and ECN for lossless RDMA forwarding; forward-compatible with Ultra Ethernet
- 100% internally lossless, cell-based fabric with VOQ architecture — eliminates head-of-line blocking at all port densities
- 460 Tbps (920 Tbps FDX) fabric capacity across 16 line card slots
- Secure Boot enabled supervisor (7800-Sup1S) for hardened platform security from power-on
- FlexRoute™ technology for Internet-scale routing with industry-leading power efficiency (from 6W per 100Gbps)
- Wire-speed breakout support: 25G, 50G, 100G, 200G, and 400G
- EVPN/VXLAN, MPLS, Segment Routing, LDP, RSVP, GRE, MLAG, ECMP/UCMP supported
- Algorithmic ACLs and Inband Network Telemetry (INT) for real-time visibility and traffic control
- Hot-swap of all components — chassis, power supplies, fabric modules, supervisor — for zero-disruption maintenance
- Forklift-free upgradability from 7800R3 Series — protects existing infrastructure investments
- Discrete cooling zones with advanced environmental monitoring for high-density deployments
- Scales to over 160,000 x 800GbE accelerators in a two-tier non-blocking topology
- Runs Arista EOS — unified, single-image operating system with full telemetry, automation, and API support

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

- Chassis: Arista 7816L — 2 Supervisor slots, 16 Line Card slots, 6 Fabric Module slots
- Form factor: 32RU, front-to-rear airflow
- Fabric capacity: 460 Tbps (920 Tbps full-duplex)
- Forwarding rate: up to 173 Billion packets per second
- Maximum port density: up to 576 x 800GbE or 1152 x 400GbE (full line card configuration)
- Included power supplies: 12 x 3kW D2 DC (LVDC)
- Included fabric modules: 5 x FM-R4 (fabric slots 1–5)
- Included cooling: 1 x FCM Fabric Cooling Module (fabric slot 6)
- Included supervisor: 1 x 7800-Sup1S (Secure Boot Enabled) — compatible with 7816L, 7816, and 7812 chassis
- Included accessories: Extended Rack Kit
- Power option: DC (this SKU)
- Breakout support: wire-speed 25G, 50G, 100G, 200G, 400G
- Power efficiency: as low as 6W per 100Gbps
- Hot-swap: all components supported
- Two-tier scale: supports over 160,000 x 800GbE or 660,000 x 400GbE accelerators in a non-blocking topology
- Operating system: Arista EOS
- Warranty: 1-Year Limited Hardware Warranty; optional NBD and 4-Hour Advance Hardware Replacement

FAQs

Q: What is included in the DCS-7816LR4-BNDS-U-DC bundle?
A: The bundle includes: the Arista 7816L chassis (16 line card slots, 2 supervisor slots, 6 fabric module slots), 12 x 3kW D2 DC power supplies, 5 x FM-R4 fabric modules, 1 x Fabric Cooling Module (FCM), 1 x 7800-Sup1S supervisor module with Secure Boot enabled, and an extended rack kit — everything needed to deploy a fully operational DC-powered spine switch chassis.

Q: What AI and HPC workloads is the Arista 7816LR4 designed for?
A: The 7816LR4 is purpose-built for AI/ML training cluster interconnect, HPC back-end networks, and hyperscale data centre spine roles. Its Arista Etherlink® suite — including DCQCN, PFC, and ECN — is specifically optimised for RDMA over Converged Ethernet (RoCE) workloads at GPU-cluster scale, and it is forward-compatible with the Ultra Ethernet standard.

Q: How does the 7816LR4 handle congestion in large-scale AI fabric deployments?
A: The 7816LR4 uses a 100% internally lossless, cell-based fabric architecture with Virtual Output Queue (VOQ) and fully distributed end-to-end scheduling. This eliminates head-of-line blocking across all 16 line card slots and ensures fair, lossless forwarding even under the sustained all-to-all traffic patterns common in large-scale AI training workloads.

Q: Can the 7816LR4 be upgraded from existing Arista 7800R3 infrastructure?
A: Yes. The 7800R4 Series is designed for forklift-free upgradability from the 7800R3 Series, allowing organisations to migrate to the new platform incrementally without replacing entire chassis infrastructure — protecting existing capital investments while gaining the performance benefits of the R4 generation.

Q: What routing and tunnelling protocols does the 7816LR4 support?
A: The 7816LR4 running Arista EOS supports a comprehensive protocol stack including EVPN/VXLAN, MPLS, Segment Routing (SR), LDP, RSVP, GRE tunnelling, MLAG active/active L2 topologies, and ECMP/UCMP L3 multi-path. Algorithmic ACLs and Inband Network Telemetry (INT) are also supported for visibility and policy enforcement at scale.

Q: Can I purchase the Arista DCS-7816LR4-BNDS-U-DC in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller offering authentic Arista hardware including the 7816LR4 chassis bundle. Contact the team directly for pricing, lead times, and optional support upgrades including Next Business Day and 4-Hour Advance Hardware Replacement services.

Datasheet

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