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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
$
T
Max Spine Capacity
Port Speed (TH5)
Packet Loss (RoCEv2)
Validated ASICs
SKU Tiers
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 fabric with RoCEv2 GPU racks and DCI OcNOS-DC data center topology. Two GPU racks (H100 RoCEv2) and a storage/CPU rack with NVMe-oF/VXLAN feed dual leaf/ToR switches (Edgecore AS7726, DC-IPBASE SKU). Two spine switches (AS9736-64D, TH5, DC-PLUS) interconnect the leaves. A DCI Gateway with 400G ZR/ZR+ extends VXLAN tunnels to a remote DC. Isolated OOB management bus (DC-MGMT) wraps top and bottom. ISOLATED OOB MGMT BUS (TOP) ISOLATED OOB MGMT BUS (BOTTOM) GPU Rack A H100 · RoCEv2 COMPUTE GPU Rack B H100 · RoCEv2 COMPUTE Storage / CPU NVMe-oF · VXLAN STORAGE Leaf / ToR PFC · ECN · VTEP Edgecore AS7726 DC-IPBASE SKU Leaf / ToR PFC · ECN · VTEP Edgecore AS7726 DC-IPBASE SKU Spine Switch BGP ECMP · EVPN AS9736-64D · TH5 DC-PLUS SKU Spine Switch ECMP · Telemetry AS9736-64D · TH5 DC-PLUS SKU DCI Gateway 400G ZR/ZR+ VXLAN tunnel ext. DC-PLUS SKU OOB Mgmt TD3-X2 · 1/10G Isolated Network DC-MGMT SKU Remote DC EVPN inter-DC OcNOS-DC OcNOS-DC — DC-MGMT → DC-IPBASE → DC-PLUS — 128G TO 51.2T
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
ASICCapacityPort Speed DC-MGMT DC-IPBASE DC-PLUS
TD3-X2128G1/10G••
TD3-X52,000G10/25/100G••
TD3-X73,200G10/25/100G••
TH26,400G100G••
TH312,800G400G••
TD412,800G400G••
TH425,600G400G••
TH551,200G800G••

*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. 50+ 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
NTT MTN SK Telecom DIGI Communications Lintasarta Telkom
See all customer stories →

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.

Book Technical Demo Download OcNOS VM →
Keep Exploring

Where OcNOS-DC fits next

Solution DC Fabric EVPN-VXLAN leaf-spine architecture and DCI. Solution AI Fabric Lossless RoCEv2 for GPU cluster training and inference. Capability Automation & APIs Ansible, NETCONF/YANG, gNMI streaming, ZTP, Docker on-switch.
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.