Put down your coffee gently. Microsoft has today released a homegrown open-source operating system, based on Debian GNU/Linux, that runs on network switches.
[blink] [blink]The software is dubbed SONiC, aka Software for Open Networking in the Cloud. It's a toolkit of code and kernel patches to bend switch hardware to your will, so you can dictate how it works and what it can do, rather than relying on proprietary firmware from a traditional networking vendor.
Back in the day, we used to laugh at jokes about "MS Linux". The world is getting weird.