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ExtremeXOS is the software or the network operating system used in newer Extreme Networks network switches. It is Extreme Networks second generation operating system after the VxWorks based ExtremeWare operating system.

ExtremeXOS is based on the Linux kernel and BusyBox. In July 2008 legal action was taken against Extreme Networks due to alleged violation of the GNU General Public License. Three months later the lawsuit was settled out of court.


Developer Extreme Networks
Written in
OS family Unix-like
Working state Current
Source model Closed Source and Open Source
Initial release Version 10.1, February 2004
Latest release Patch4 (21.1.1 Patch2 for Gen2 Devices) / 05.05.2016 (02.05.2016)
Available in English
Platforms Extreme Networks, Network switches
Kernel type Monolithic (Linux)
Default user interface Command Line Interface (CLI)
Official Website
dido/public/ra/xapend/xapend.d_opsys/extremexos/start.txt · Last modified: 2021/11/09 15:58 by char
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