@linuxfoundation I looked for tunnel ip-l2tp / #rfc8159 on the LinuxFoundation Wiki, but get a search error. Curious: Any place tracking Wiki / man deltas? Entry "tunnel" on wiki doesn't mention it either. Of course "if its missing feel free to contribute it". Claro.
userland: https://github.com/dmarion/kite
@snabbco implementation: https://github.com/snabbco/snabb/issues/100 …
linux man page:
http://man7.org/linux/man-pages/man8/ip-l2tp.8.html …
this search yields a good # of useful #RFC8159 links on Linux:
https://www.google.com/search?q=linux+source …+"ip-l2tp"
methinks it fairly trivial to implement in #OpenBSD too