No, Ouroboros rethinks the whole network architecture, from the ground up. cjdns and yggdrasil build on top of IPv6, which we believe has the same architectural flaws as IPv4.
For accuracy, Yggdrasil doesn't "build on top of IPv6", it merely uses IPv6 over TUN in the current binaries because that most closely translates to a usable experience for real people today without having to rewrite their applications. It has been a good way to get users to help scale-test.
The underlying routing scheme, virtual switch/router implementation, specification etc are not aware of (nor do they care about) IP.
The underlying routing scheme, virtual switch/router implementation, specification etc are not aware of (nor do they care about) IP.