ONOS

ONOS is a software-defined networking control platform for teams building and operating large managed networks. It is strongest where distributed control and programmable interfaces matter; teams seeking a ready-made tool for routine network administration should look elsewhere.

Overview

ONOS gives network applications a way to control devices across different protocols, with abstractions facing both the applications and the network. Its symmetric cluster of identical instances distributes work and is designed to keep operating when an instance fails. For service-provider networks, where controller resilience matters, that architecture is a meaningful advantage. Data-center and campus networks are also possible uses.

The distributed design is not a shortcut around infrastructure work. µONOS microservices are intended for cloud and data-center environments and use Kubernetes; teams need the skills and operational capacity to deploy and maintain that environment. ONOS is a network control platform, not a general-purpose configuration dashboard.

Key features

Network operations: µONOS covers device configuration, monitoring and maintenance, forwarding-plane programming, topology validation, and detailed performance metrics. That breadth suits operators who need to program and observe the network, not just change device settings.

Interfaces and protocols: µONOS uses P4/P4Runtime, gNMI/OpenConfig, and gNOI, with gRPC connecting modular microservices. The ONOS documentation also identifies OpenFlow as its primary southbound protocol, with OVSDB, NETCONF, and SNMP among the other configuration protocols. This range is useful for mixed environments, though teams still need to match their devices and workflows to the relevant interfaces.

External routing: The SDN-IP application lets an ONOS-controlled network exchange traffic with adjacent external networks using BGP, extending its reach beyond the controlled network.

Deployment and interface: Docker images and Helm charts support Kubernetes deployment. The cloud-native GUI uses Angular and gRPC Web to reach backend modules. Production downloads are offered as a release tar.gz package or Docker image; development can use the source repository.

Application security: Security Mode is intended to restrict applications' access to northbound APIs. That is relevant when multiple applications interact with the controller, though the feature's stated purpose alone does not establish a complete security model.

Pricing

ONOS costs free. The ONOS plan is open-source software under the Apache License 2.0, so it suits teams that want to deploy and adapt the platform without a software license charge. The trade-off is that deployment and operation remain the team's responsibility; the community points users to its FAQ, mailing list, and Slack team for questions.

Platforms

ONOS supports API, Linux, macOS, self-hosted, and web environments. Its network-control standards include P4Runtime, gNMI/OpenConfig, gNOI, and OpenFlow. Kubernetes is central to the µONOS deployment approach, with Docker images and Helm charts among the deployment tools. The downloads page identifies X-Wing 2.7.0, dated July 16, 2021, as the latest listed long-term-support release. That release date is a reason for teams with current deployment requirements to check compatibility before committing.

Who it's for

ONOS is best for network engineering teams building programmable control systems for service-provider networks, with data-center and campus operators also in scope. Its distributed architecture, protocol interfaces, and operations capabilities are most valuable when teams can invest in Kubernetes-based infrastructure and need control across network devices. It is a poor fit for organizations looking for a simple, preconfigured management product or lacking the capacity to operate a distributed platform.

Pros and cons

Pro — resilient distributed design: Identical cluster instances distribute work and are designed to handle instance failures, a useful foundation for critical network control.

Pro — broad control coverage: Multiple device protocols and interfaces pair with configuration, monitoring, topology validation, and forwarding-plane programming.

Pro — no license charge: The Apache 2.0 open-source plan gives teams room to use and adapt the software without a paid tier.

Con — infrastructure demands: Kubernetes-oriented microservices make ONOS a substantial operational commitment compared with a conventional network management tool.

Con — release currency: The latest listed LTS date is in 2021, which may complicate decisions for teams that require a recent long-term-support release.

Alternatives

Choose ManageEngine Network Configuration Manager instead if conventional network configuration management and a capped free edition are a better match: its free plan covers two devices, while its professional edition is priced at $238 a year.

Containerlab is a free alternative for teams focused on network labs; it requires a Linux server or VM, Docker, and sudo privileges for some operations, rather than serving as ONOS's distributed control platform.

Nautobot offers a self-managed open-source Community plan for exploring, initial workflows, and limited production deployments. Pick it when that scope fits better than ONOS's network-control focus.

NetBrain is another network operations option, with a paid subscription license and a free trial; its license is based on network components and seats.

Arista NG Firewall is a web-based alternative with a free tier for basic security and connectivity features, suited to readers seeking those capabilities rather than an SDN control plane.

Cisco pyATS is a free, Apache 2.0-licensed option for teams whose need is network testing rather than distributed device control.

Gluware offers a community edition with up to 20 devices for one renewable year, full application suite except Topology, community support, and on-demand training. It may fit teams looking for that bounded free entry point.

Infoblox Cloud Network Automation is another option for cloud network automation, with token-based licensing priced by agreement.

For category browsing, see Network Automation Software and Software-Defined Networking Software.

Verdict

Choose ONOS if your team needs a programmable, distributed control plane for a service-provider, data-center, or campus network and can operate Kubernetes-based infrastructure. Its broad interfaces and failure-aware cluster design are the main reasons to choose it. Look elsewhere if you need a simpler network administration product or a more recent listed LTS release.