Jay Turner, CloudRouter Project Lead and Senior Director of DevOps at IIX told Enterprise Networking Planet that CloudRouter 2 is based on the Fedora 22 Linux distribution. Fedora is a community distribution of Linux that is backed by Enterprise Linux vendor Red Hat. Fedora 22 was first released in May of this year.
Turner noted that the CloudRouter project changes out a few components from a regular Fedora 22 build including BIRD, Quagga, etc. so that CloudRouter is deemed a Fedora Remix.