Arista 7800R3 Series 400G Core Fabric Switch

Arista 7800R3 Series 400G Core Fabric Switch

Brand: Arista | Category: Network Switches

SKU: DCS-7812R3 | Part #: DCS-7812R3 | MPN: DCS-7812R3

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About the Arista 7800R3 Series 400G Core Fabric Switch

The Arista DCS-7812R3 is a 7800R3 Series core fabric switch delivering 400G throughput for hyperscale and enterprise spine-layer architectures.

At a glance — key specifications

Port Speed400G
Fabric RoleCore
Part NumberDCS-7812R3
ManufacturerArista
Rack Units1U or 2U (model-dependent)
Fans / PSURedundant hot-swap

Perfect for

  • Spine-leaf datacentre fabric
  • Top-of-rack access layer
  • AI training cluster networking (Quantum/Spectrum-X)
  • Campus core and aggregation
  • High-availability redundant fabric

Frequently asked questions

Does the Arista 7800R3 Series 400G Core Fabric Switch support our SFP transceivers?

Most enterprise switches ship without transceivers; we quote vendor-matched optics alongside the switch (Cisco-for Catalyst/Nexus, HPE/Aruba-for CX). Third-party MSA-compatible options are also available at lower cost — specify preference in the RFQ.

Do you provide stacking / VPC / MLAG configuration help?

Yes — our network engineers can pre-stage stacking, VPC pairs, MLAG, EVPN-VXLAN, or fabric extender configurations before shipping, or provide remote commissioning. Add commissioning to your RFQ.

What software licensing is included?

Switch software licensing varies by vendor. Cisco DNA / Cisco DCNM, Aruba CX licensing tiers, NVIDIA Cumulus — we quote the licensing tier matched to your features (BGP-EVPN, telemetry, automation). No surprises at delivery.

Request a quote for the Arista 7800R3 Series 400G Core Fabric Switch

Submit your quantity, destination country, and required lead time below. Our pre-sales team responds within 48 hours with confirmed competitive quoting, availability, and matching support contract options.

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Technical Specifications

BrandArista
CategoryNetwork Switches
SKUDCS-7812R3
Part NumberDCS-7812R3
ConditionNew
Port Speed400G
Fabric RoleCore
Fans / PSURedundant hot-swap
Manufacturer Part NumberDCS-7812R3
Product Series7800R3
Port Count12
Form Factor2U Rack
Switching Capacity14.4 Tbps
Throughput5.76 Tbps
InterfaceQSFP-DD
Memory32 GB DRAM
ManagementEOS Network OS

Frequently Asked Questions about Arista 7800R3 Series 400G Core Fabric Switch

What software licensing is included?

Switch software licensing varies by vendor. Cisco DNA / Cisco DCNM, Aruba CX licensing tiers, NVIDIA Cumulus — we quote the licensing tier matched to your features (BGP-EVPN, telemetry, automation). No surprises at delivery.