Todo: - ~~Check travisCI to use container -> now travisCI uses container, hence need to switch sudo-enabled VM. [Build Environment in TravisCI](https://docs.travis-ci.com/user/reference/overview/#Virtualization-environments)~~ - ~~Change TravisCI setting from container (default) to sudo-enabled VM~~ - ~~add ipv4v6 tests and v6 tests~~ - ~~add vxlan tests~~ - add more tests!