Cumulus Linux

Cumulus Linux is the industry's most innovative open network operating system that allows you to automate, customize and scale your data center network like no other.

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Why choose Cumulus Linux

Cumulus Linux is the only open network OS that allows you to affordably build and efficiently operate your network like the world’s largest data center operators, unlocking web-scale networking for businesses of all sizes.

Server Check

100+ hardware platforms

Choose from an extensive list of qualified and supported hardware based on the latest innovations in merchant silicon

Marine Mammal Penguin

Complete standardization

Reduce complexities and get complete interoperability with Linux across your entire data center

Lock Shield

Network protection

Receive additional levels of security exclusive to Cumulus Linux in addition to industry-standard security features

Resize Expand Corner

Flexible open architecture

Enables you to customize your network and scale seamlessly

Currency Dollar Decrease

Reduced CapEx

by lowering the cost of acquiring open switches and optics

Charging Flash Sync

Reduced OpEx

by leveraging existing talent and assigning more switches per engineer

Cog Double 3

Built for
automation first

Enjoy networking that’s consistent, repeatable and integrates easily with third-party tools via REST API's

Time Clock Fire

Faster IT delivery

Leverage native integration and best-of-breed tools for automation, monitoring, analytics and more

How Cumulus Linux works

The figure below summarizes both the essence of the Cumulus Linux architecture as well as the philosophy that we use to guide our development.

Cumulus Linux architecture Cumulus Linux architecture View PDF

What you get with Cumulus Linux

Technology we innovated in-house to make your life easier:


OSPF Unnumbered

Create configs faster by no longer depending on unique IP addresses, which simplifies automation.


BGP Unnumbered

Automation gets even easier with this simplified IP approach. All you need is one IP template for leaf nodes and one for the spine nodes. Easy, right?


Redistribute Neighbor

Get VM and host mobility by plugging in your server into any RDNBR switch making it L3 discoverable on the fabric. If you have any need to move the server, there’s no need to reconfigure.


Prescriptive Topology Manager (PTM)

Efficiently go from whiteboard to physical cable. With PTM, you can program your data center to verify connections and resolve issues faster.


Virtual Routing and Forwarding

Run multiple network paths without the need for multiple switches, giving you traffic isolation and network segmentation for multiple devices.


Lightweight Network Virtualization (LNV)

Accelerate VXLAN deployments with a controllerless solution.


Ethernet Virtual Private Networks (EVPN)

Get freedom from L2 complexities with this modern, standards-based, interoperable technology that allows legacy layer 2 applications to operate over next-generation layer 3 networks. Learn more about EVPN.


Network Command Line Utility (NCLU)

Use our rich and simple command line for easy network configuration and operation

Plus standard technology that we’ve improved:


Unlock the stack with open architecture using a Linux operating model.

Native security

From OpenSSH to authentication, Cumulus Linux keeps your switches secure.

Hardware your way

Launch fully-loaded with Cumulus Express or choose from our 50+ hardware partners.

Unified stack

With a unified operating model across compute and network, you'll reduce complexities and get guaranteed interoperability.

Software driven

Our software writes directly to the silicon giving you a software driven and hardware accelerated approach.

Learn more about Cumulus Linux

Prefer to try before you buy? Try Cumulus Linux for free.

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