Article · Wikipedia archive · Last revised Jun 4, 2026

ExtremeXOS

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.

Last revised
Jun 4, 2026
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≈ 1 min
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Wikipedia ↗
ExtremeXOS
DeveloperExtreme Networks
OS familyUnix-like
Working stateCurrent
Source modelClosed source and partly Open source
Initial releaseversion 10.1: February, 2004
Latest releasev33.3.1.4 / 16.04.2025
Available inEnglish
Supported platformsExtreme Networks Network switches
Kernel typeMonolithic (Linux)
Default
user interface		Command-line interface
Official websitewww.extremenetworks.com/products/extreme-xos.aspx

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 BusyBox took legal action 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

References

References

  1. ExtremeXOS Network Operating System, Extreme Networks.
  2. Extreme Networks puts Linux to work in routing switch, Network World, 2004-05-03, archived from the original on 2011-06-15, retrieved 2009-09-09.
  3. Today's SFLC/BusyBox target: Extreme Networks, Inc, Linux Weekly News.
  4. BusyBox Developers Settle Case With Extreme Networks, Software Freedom Law Center.