OcNOS 7.0 GA

OcNOS-DC
Data Center NOS

Open network OS for leaf-spine DC fabric. EVPN-VXLAN overlays, lossless RoCEv2 for AI/ML GPU clusters, ZTP automation, and streaming telemetry on validated Broadcom open hardware.

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dc-spine01 · OcNOS-DC LIVE

$show bgp evpn summary

BGP EVPN · AS 65001

Neighbor State Pfx

10.0.0.11 Estab 342

10.0.0.12 Estab 342

10.0.0.13 Estab 341

10.0.0.14 Estab 341

$show pfc counters et-0/0/1

Priority 3 RoCEv2

Drop count 0

Status ✓ lossless

$show ztp status

State ✓ Complete

Fabric ✓ EVPN joined

Max Spine Capacity

Port Speed (TH5)

Packet Loss (RoCEv2)

Validated ASICs

SKU Tiers

Architecture Briefs

Take it offline. Read it on a plane.

The production datasheet and the EVPN-VxLAN reference architecture: short PDFs to share with the team.

Datasheet

OcNOS 7.0 Data Center Datasheet

Full feature list, SKU tiers, supported platforms, and licensing for OcNOS-DC: the production reference document.

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Solution Brief

Modernize Your Data Center with EVPN-VxLAN

Leaf-spine reference architecture: symmetric IRB, Type-2 / Type-5 routes, distributed anycast gateway, the same fabric as Arista/Cisco on open hardware.

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Who Deploys OcNOS-DC

Built for the teams running AI, enterprise, and cloud fabrics.

From GPU-cluster spines to multi-tenant leaf: one NOS, three SKUs, validated open hardware.

AI & GPU Cluster Operators

Lossless east-west fabric for RDMA workloads.

"GPU-to-GPU training can't tolerate a single dropped packet. One drop stalls the entire job."

Pre-tuned PFC & ECN for RoCEv2 on Tomahawk 4/5 spines (25.6T–51.2T). EVPN-VXLAN overlay, ZTP, gNMI telemetry: the same lossless Ethernet hyperscalers run.

DC-PLUS · TH4 / TH5

Enterprise Data Center

EVPN-VXLAN leaf-spine without the proprietary tax.

"Same Broadcom silicon as Arista EOS and Cisco Nexus, paying the vendor premium for it."

Symmetric IRB, Type-2/Type-5 routes, distributed anycast gateway, ARP suppression on Trident & Tomahawk platforms. BGP underlay with ECMP at every tier.

DC-IPBASE · TD3 – TH3

Cloud & Multi-Tenant Operators

Hundreds of tenant VNIs, one fabric.

"Separate hardware per tenant doesn't scale. Neither do vendor-specific automation ecosystems."

Per-tenant VRF isolation, VXLAN encapsulation, Linux-based Docker-on-switch. NETCONF/YANG, gNMI, Ansible: open APIs, portable automation.

DC-IPBASE / DC-PLUS

Full Feature Matrix Qualified Hardware Documentation

Why OcNOS-DC

Open economics. AI-grade performance.

AI & GPU Clusters

Lossless RoCEv2: Zero Packet Loss GPU-to-GPU Fabric

PFC and ECN pre-configured for RDMA workloads. OcNOS-DC on TH4/TH5 platforms delivers the same lossless Ethernet that hyperscalers run in production AI clusters, without the Cisco or NVIDIA price tag.

PFC Priority 3 ECN WRED RoCEv2 RDMA 0 Drop

AI Fabric Solution

Overlay Fabric

EVPN-VXLAN: Production Leaf-Spine from Day 1

Symmetric IRB, distributed anycast gateway, ARP suppression, and Type-5 routes. ZTP ensures every new leaf joins the fabric automatically with zero CLI work.

Telemetry

Real-Time gNMI Streaming

Buffer utilisation, PFC pause counters, and congestion events streamed in real time. OpenConfig YANG models for vendor-neutral integration.

Day 0 Automation

ZTP: Rack Ships. Fabric Joins.

DHCP-based Zero Touch Provisioning onboards every new leaf and spine automatically. GPU cluster racks commissioned without a single SSH session.

One Accountable Vendor

Single Support Contract: Software + Hardware + RMA

One SLA across OcNOS, the validated Edgecore or UfiSpace platform, and RMA logistics. No multi-vendor finger-pointing when a switch fails at 3 a.m.

Architecture

OcNOS-DC Leaf-Spine Topology

From GPU cluster ToR switches through leaf-spine fabric to DCI: one NOS, one vendor, one support contract.

OcNOS-DC Leaf / Spine

DCI / Coherent optics

Servers / External

Hover nodes for capability and SKU details

Choose Your OcNOS-DC

SKU & platform comparison

OcNOS-DC ships in three editions. All include unified IPI support for both software and hardware.

OcNOS-DC: Data Center Switches			DC-MGMT	DC-IPBASE	DC-PLUS
Layer 2 / Layer 3			•	•	•
EVPN-VXLAN				•	•
Ethernet for AI (RoCEv2 / PFC / ECN)				•	•
Streaming Telemetry (gNMI/gRPC)					•
400G ZR/ZR+ Coherent Optics (DCI)					•
Qualified Platforms
ASIC	Capacity	Port Speed	DC-MGMT	DC-IPBASE	DC-PLUS
TD3-X2	128G	1/10G	•	•
TD3-X5	2,000G	10/25/100G		•	•
TD3-X7	3,200G	10/25/100G		•	•
TH2	6,400G	100G		•	•
TH3	12,800G	400G		•	•
TD4	12,800G	400G		•	•
TH4	25,600G	400G		•	•
TH5	51,200G	800G		•	•

*Feature support is platform-dependent. Refer to the Feature Matrix for details. 40+ qualified DC platforms available.

Complete DC stack in every SKU

EVPN-VXLANSymmetric IRBBGP ECMP RoCEv2PFCECN WRED RDMAZTPgNMI/gRPC OpenConfigNETCONF/YANGAnsible 400G ZR+Docker on-switchRESTCONF

Test Drive Free Qualified Platforms Interactive Feature Matrix

How We Compare

OcNOS-DC vs. Arista EOS / Cisco Nexus / NVIDIA Spectrum-X

Same Broadcom silicon. Open hardware. No proprietary tax on AI networking.

✕ Proprietary DC Switching (Arista / Cisco / NVIDIA)

Proprietary NOS on proprietary hardware: vendor lock-in at every refresh

AI fabric features (RoCEv2, PFC tuning) require premium SKU or add-on license

Vendor-specific automation ecosystems: limited portability across platforms and generations

Substantial hardware premium vs equivalent Broadcom silicon on open ODM platforms

License renewals and refresh cycles tied to vendor hardware cadence

✓ OcNOS-DC on Open Hardware

Open NOS on Edgecore / UfiSpace open hardware: multi-vendor HW choice

Full RoCEv2 lossless AI fabric included in DC-IPBASE: no add-ons

Linux-based, open APIs: Ansible, NETCONF/YANG, gNMI, RESTCONF, Docker on-switch

Same Broadcom TH5 silicon: 60–70% lower total cost of ownership

Single IPI support contract covers OcNOS-DC software and validated hardware

Also an alternative to DIY SONiC deployments. OcNOS-DC is a commercial NOS with 24/7 TAC, single-vendor SLA, and RMA logistics. SONiC is open-source and requires internal integration, hardware validation, and third-party support: engineering overhead IP Infusion absorbs.

Proven in Production

OcNOS is deployed where networks actually run.

600+ operator networks. 60+ countries. 40+ validated open-hardware platforms. Shipping carrier-grade network software since 1999.

600+

Operator Networks

60+

Countries

50+

Validated Platforms

1999

Shipping Since

Also deployed by

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Ready to deploy OcNOS-DC?

Talk to an engineer who has deployed OcNOS-DC in production, or try it free in our cloud lab: no hardware required.

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Where OcNOS-DC fits next

FAQ

Frequently asked questions

What is EVPN-VXLAN and why does it matter for data center networking?

EVPN-VXLAN is the industry-standard overlay fabric for multi-tenant data centers. VXLAN encapsulates Layer 2 frames in UDP for transport over a Layer 3 underlay, while EVPN (RFC 7432) provides the BGP-based control plane for distributing MAC and IP reachability. OcNOS-DC implements symmetric IRB, Type-2 and Type-5 routes, distributed anycast gateway, and ARP suppression: the full production fabric stack.

How does OcNOS-DC achieve lossless networking for AI/ML GPU clusters?

OcNOS-DC implements Priority Flow Control (PFC) and Explicit Congestion Notification (ECN) pre-tuned for RoCEv2 RDMA traffic patterns. PFC pauses specific traffic classes to prevent GPU-to-GPU packet drops, while ECN signals congestion early to prevent buffer bloat. Together they enable zero-packet-loss AI fabric, critical for distributed training workloads where a single dropped packet stalls the entire GPU job.

What's included in each DC SKU, and what requires a higher tier?

DC-MGMT covers Layer 2 / Layer 3 for out-of-band management switches. DC-IPBASE adds EVPN-VXLAN overlay fabric and lossless Ethernet for AI (RoCEv2 / PFC / ECN): this is the baseline for most leaf-spine deployments, including GPU cluster ToRs. DC-PLUS adds streaming telemetry (gNMI/gRPC) and 400G ZR/ZR+ coherent optics for DCI. No per-protocol feature licensing within a tier: what you see on the SKU table is what's in the SKU. See the OcNOS Feature Matrix for the full breakdown by platform.

Who owns the support contract on open hardware, IP Infusion or the ODM?

IP Infusion owns a single accountable support contract that covers OcNOS-DC software, validated Edgecore or UfiSpace hardware, and RMA logistics. You open one ticket with the IPI TAC; we coordinate with the ODM on your behalf. This eliminates the classic multi-vendor finger-pointing operators experience with disaggregated stacks. See Support for SLA details.

What hardware platforms does OcNOS-DC support?

OcNOS-DC supports 25+ validated data center platforms from Edgecore and UfiSpace based on Broadcom Tomahawk 5, Tomahawk 4, Tomahawk 3, Trident 4, and Trident 3 chipsets. Form factors range from 1RU 48×25G + 8×100G top-of-rack leaves to 32×400G and 64×400G / 64×800G spine switches. See the full list at the Hardware Compatibility List, or read the per-chip silicon deep-dives for spec details and platform recommendations.

FAQ

OcNOS-DC: frequently asked questions

What is OcNOS-DC and what is it used for?

OcNOS-DC is IP Infusion's data center variant of OcNOS, the network operating system in production with 600+ operators across 60+ countries. It is built for leaf-and-spine fabrics that carry EVPN-VXLAN overlays, lossless RoCEv2 traffic for AI and ML clusters, and 400G or 800G DCI links. The OS runs on disaggregated Broadcom-based switches from Edgecore and UfiSpace, giving operators a commercial alternative to Arista EOS, Cisco Nexus, and DIY SONiC builds.

Which EVPN-VXLAN features does OcNOS-DC support?

OcNOS-DC implements EVPN-VXLAN with both Type-2 MAC/IP and Type-5 IP-prefix routes, symmetric IRB, distributed anycast gateway, and ARP suppression. EVPN multi-homing with all-active ESI LAG replaces legacy MLAG for dual-homed servers and storage. The control plane uses MP-BGP per RFC 7432 and RFC 8365, so it interoperates with mainstream EVPN implementations from other vendors.

How does OcNOS-DC build a lossless RoCEv2 fabric for AI workloads?

OcNOS-DC ships with Priority Flow Control (PFC) and Explicit Congestion Notification (ECN) profiles pre-tuned for RoCEv2, so RDMA traffic classes can be paused on a per-priority basis to avoid GPU-to-GPU packet drops. The intent is a zero packet loss fabric for xCCL collectives such as NCCL and RCCL. Real production deployments to date have run on the order of 20 to 200 GPUs, and the design scales further as engagements grow.

What are the OcNOS-DC license tiers?

OcNOS-DC is offered in three SKUs. DC-MGMT provides Layer 2 and Layer 3 features for out-of-band management switches. DC-IPBASE adds EVPN-VXLAN overlay and lossless Ethernet for AI fabrics, and DC-PLUS extends that with streaming telemetry and 400G ZR/ZR+ coherent optics for data center interconnect.

Which switches and Broadcom silicon does OcNOS-DC run on?

OcNOS-DC supports 25+ open hardware platforms from Edgecore and UfiSpace, spanning 48x25G ToR leaves up to 64x800G spines. Supported Broadcom silicon includes Tomahawk 5 (51.2T, 800G), Tomahawk 4 (25.6T, 400G), Tomahawk 3, Trident 4, and Trident 3. The same NOS image runs across the portfolio, so operators can standardize one CLI and one automation toolchain across leaf, spine, and border roles.

How does OcNOS-DC handle automation and zero-touch provisioning?

OcNOS-DC exposes NETCONF, RESTCONF, and gNMI/gRPC northbound, with OpenConfig and native YANG models, so it slots into existing Ansible, Terraform, or in-house controller pipelines. Zero Touch Provisioning uses DHCP options 66/67 to fetch the image and day-zero config, which lets a new leaf or spine join the fabric without console access. Streaming telemetry is available in the DC-PLUS tier for closed-loop assurance.