| Developer | Extreme Networks |
|---|---|
| OS family | Unix-like |
| Working state | Current |
| Source model | Closed source and partly Open source |
| Initial release | version 10.1: February, 2004 |
| Latest release | v33.3.1.4 / 16.04.2025 |
| Available in | English |
| Platforms | Extreme Networks Network switches |
| Kernel type | Monolithic (Linux) |
| Default user interface | Command-line interface |
| Official website | www |
ExtremeXOS is the software or the network operating system used in newer Extreme Networks network switches. [1] It is Extreme Networks second generation operating system after the VxWorks based ExtremeWare operating system.
ExtremeXOS is based on the Linux kernel and BusyBox. [2] In July 2008 legal action was taken against Extreme Networks due to alleged violation of the GNU General Public License. [3] Three months later the lawsuit was settled out of court. [4]