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How to Evaluate Bare Metal Switches and Custom NOS for Open Networking: An Australian Enterprise Buyer Guide

A practical buyer guide for Australian enterprises evaluating bare metal switches and custom network operating systems like SONiC. Covers hardware criteria, NOS selection, vendor lock-in risks, and deployment readiness.

By xSONiC Team · · SONiCopen networkingdata centerAI fabricEthernetautomation

Why Australian enterprises are rethinking proprietary switching

For years, enterprise networking in Australia followed a predictable pattern: buy the switch, accept the NOS, renew the support contract, and repeat. That model worked when networks were static and change was slow.

Today, the equation has shifted. AI workloads demand low-latency spine-leaf fabrics with RoCE and RDMA support. Campus networks need programmable access layers that adapt to policy changes without forklift upgrades. And Australian IT teams face pressure to reduce vendor lock-in while maintaining operational reliability.

Bare metal switches paired with a custom or open-source network operating system (NOS) offer a credible alternative. But evaluating them requires a structured approach. This guide walks through the key criteria Australian network teams should use when assessing open networking hardware and NOS platforms.

What makes a switch ‘bare metal’?

A bare metal switch is network hardware shipped without a pre-installed production NOS. The switch includes the ASIC, forwarding silicon, fans, power supplies, and management interfaces, but the buyer chooses which software runs on top.

This model decouples hardware from software. It mirrors the approach that transformed the server industry: commodity hardware running a choice of operating systems. For networking, the most prominent open-source NOS option is SONiC (Software for Open Networking in the Cloud).

SONiC is a Linux-based, open-source network operating system maintained under the Linux Foundation. According to the SONiC Foundation, SONiC offers a full suite of network functionality including BGP and RDMA, production-hardened in the data centers of some of the largest cloud service providers. Its container-based architecture runs each network function in its own Docker container, providing fault isolation, simplified upgrades, and enhanced scalability.

The value proposition for Australian enterprises is straightforward: choose the hardware that fits your port density and speed requirements, then select the NOS that matches your operational model.

The evaluation framework: six criteria for bare metal switch selection

1. ASIC compatibility and supported features

The ASIC defines what the switch can do. Not every NOS supports every ASIC feature set. When evaluating bare metal hardware, confirm that your target NOS has mature support for the specific features you need.

Key questions to ask:

  • Does the NOS support the ASIC’s full forwarding table capacity?
  • Are advanced features like VXLAN, EVPN, MPLS, or segment routing production-ready on this NOS and ASIC combination?
  • Is RDMA over Converged Ethernet (RoCE v2) supported if you plan AI or HPC backend fabrics?

SONiC uses the Switch Abstraction Interface (SAI) to decouple hardware from software, which accelerates hardware innovation across vendors. However, SAI maturity varies between ASIC vendors. Verify feature parity before committing.

2. NOS maturity and community support

Not all NOS options are equally mature. Evaluate the NOS on these dimensions:

CriterionWhat to check
Release cadenceHow often are stable releases published?
Community sizeActive contributors, GitHub issues resolved, Slack activity
Enterprise adoptionIs the NOS running in production at scale somewhere?
Documentation qualityAre configuration guides, troubleshooting docs, and API references available?
Security patchingHow quickly are CVEs addressed?

SONiC benefits from backing by major cloud providers and the Linux Foundation, with an active open-source community. Its modular, containerized architecture means individual components can be updated without full system rebuilds.

Other NOS options to consider include:

  • Cumulus Linux: A Linux-based data center NOS with strong automation capabilities
  • DENT: Focused on distributed enterprise and campus edge use cases
  • SONiC variants: Enterprise distributions that add commercial support layers on top of the open-source base

3. Hardware form factor and port density

Match the hardware to your deployment environment:

  • Top-of-rack (ToR): 1U switches with 48x 25GbE or 100GbE downlinks and 6-8x 100GbE or 400GbE uplinks
  • Spine/aggregation: 2U switches with 32-64x 100GbE or 400GbE ports
  • Campus access: 1U switches with PoE+ support, 24 or 48 copper ports, and SFP+ uplinks
  • AI fabric backend: High-density 400GbE or 800GbE switches for GPU cluster interconnects

For Australian data center deployments, confirm that the bare metal platform supports the optics and cabling infrastructure already in your facilities. QSFP28, QSFP-DD, and OSFP form factors dominate at 100G and above.

4. Management, automation, and programmability

Open networking only delivers its value if you can automate it. Evaluate:

  • Configuration model: SONiC uses JSON-based configuration files and supports both CLI and programmatic configuration methods. Does your team have Linux and JSON skills?
  • API access: NETCONF/YANG and gNMI support enable model-driven management. This matters for teams using Ansible, Terraform, or NMS platforms.
  • Telemetry: Streaming telemetry with gRPC or INT (In-band Network Telemetry) support provides real-time visibility that SNMP polling cannot match.
  • Integration: Does the NOS integrate with your existing monitoring stack (Prometheus, Grafana, ELK)?

xSONIC bare metal switches are designed to support NETCONF/YANG-based management, connecting to the broader xSONIC solution ecosystem including the AIDC Controller for centralized fabric management.

5. Support and operational risk

This is the factor that makes or breaks open networking adoption in Australian enterprises. Ask:

  • Is there a local or APAC-based support option for the NOS?
  • What is the escalation path for hardware failures?
  • Can you get 24x7 support for production environments?
  • What is the vendor’s Australian presence: direct sales, distributor partners, or remote-only?

For mission-critical deployments, an enterprise NOS distribution with commercial support and SLAs is often the right choice over pure community-supported open source. The open-source base provides the flexibility; the commercial layer provides the safety net.

6. Total cost of ownership

Bare metal switches typically offer 30-60 percent lower hardware acquisition costs compared to equivalent branded switches. But TCO includes more than the box.

Factor in:

  • NOS licensing fees (if using a commercial distribution)
  • Staff training and operational ramp-up time
  • Automation tooling development
  • Support contract costs
  • Optics and cabling compatibility

The savings are real, but only if your team has or can build the operational capability to manage the platform.

SONiC in production: what the sources say

SONiC is not a lab experiment. The SONiC Foundation and GitHub project documentation confirm several production-readiness indicators:

  • Multi-vendor support: SONiC runs on switches from multiple vendors and ASICs, not tied to a single silicon provider
  • Production-hardened: Battle-tested in large-scale cloud data centers, not just enterprise lab environments
  • Containerized architecture: Each network function runs in its own Docker container, enabling independent component updates and better fault isolation
  • Standard Linux interfaces: Uses standard Linux tools and interfaces, reducing the learning curve for teams with existing Linux skills
  • Apache 2.0 licensing: Fully open source with a permissive license, enabling commercial modifications and distributions

NVIDIA’s networking portfolio further validates the SONiC ecosystem. NVIDIA offers Pure SONiC as one of its supported NOS options alongside Cumulus Linux for Spectrum Ethernet switches. The Spectrum switch family supports port speeds from 100GbE through 800GbE, with the Spectrum-4 (SN5000) and Spectrum-6 (SN6000) series targeting AI and high-performance data center workloads.

For Australian enterprises building AI backend fabrics, this means the bare metal plus SONiC stack is supported by major silicon vendors and runs on hardware from multiple switch manufacturers.

A practical evaluation checklist for Australian teams

Use this checklist when evaluating bare metal switches and custom NOS options:

  1. Define your workload: Data center spine-leaf? Campus access? AI fabric backend? The use case drives hardware and NOS requirements.
  2. Shortlist hardware platforms: Compare 2-3 bare metal switch models based on ASIC, port count, form factor, and power budget.
  3. Validate NOS compatibility: Confirm that your target NOS has production-grade support for the ASIC features you need, not just lab support.
  4. Run a proof of concept: Deploy the chosen hardware and NOS in a lab. Test failover, upgrade procedures, telemetry, and automation workflows.
  5. Assess operational readiness: Can your team configure, troubleshoot, and upgrade this platform today? If not, plan a training path.
  6. Confirm local support: Verify that Australian support options exist for both hardware and NOS before committing to production deployments.
  7. Model TCO over 3-5 years: Include hardware, NOS licensing, support, training, and automation development costs.

Where xSONIC fits

xSONIC bare metal switches are designed for engineering-led network teams that want the flexibility of open networking without sacrificing production reliability. The platform supports:

  • Enterprise SONiC and other open NOS options
  • NETCONF/YANG model-driven management
  • Integration with xSONIC solution pillars including EVPN-VXLAN fabric design and AI fabric architectures
  • 100G, 400G, and 800G port speed options for data center and AI backend use cases

For Australian enterprises evaluating the shift from proprietary to open networking, xSONIC provides a practical on-ramp: hardware you can verify, a NOS you can inspect, and a solution stack you can grow into.

Next steps

Source References

Sources Reviewed