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Welcome to Cumulus Networks

We are transforming networking with Cumulus Linux, the industry's first, full-featured Linux operating system for networking hardware. Cumulus Linux is a complete network operating system, based on Debian wheezy. Unlike traditional embedded platforms, Cumulus Linux provides a complete environment pre-installed with scripting languages, server utilities, and monitoring tools. Management tasks are accomplished via SSH using standard Linux commands or over a serial console connection.  

Extended Support Release

This version of Cumulus Linux is an Extended Support Release (ESR). Cumulus Linux 2.5 ESR started with Cumulus Linux 2.5.6 and all future releases in the 2.5 product family will all be ESR releases. To learn about ESR, please read this article.

Cumulus Linux VersionRelease Notes
2.5.12Release notes
2.5.11Release notes
2.5.10Release notes
2.5.9Release notes
2.5.8Release notes
2.5.7Release notes
2.5.6Release notes


Download the User Guide

You can download the entire Cumulus Linux 2.5.12 user guide as a PDF.

Still using Cumulus Linux 2.5.11 or earlier? You can download the 2.5.11 PDF, 2.5.10 PDF, 2.5.9 PDF, 2.5.8 PDF, 2.5.7 PDF, 2.5.6 PDF, 2.5.5 PDF2.5.4 PDF, 2.5.3a PDF, 2.5.2 PDF, 2.5.1 PDF or the 2.5.0 PDF of the entire user guide.

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