I'd like to say I am looking to do the same, and I cannot see that option either. I have checked that ifenslave is installed, this is what I see: apt-cache policy ifenslave ifenslave: Installed: 2.9ubuntu1 Candidate: 2.9ubuntu1 Version table: *** 2.9ubuntu1 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status I also note, that I cannot see any other options, all I see is "Add new Interface", i cannot see "add bridge" or "add new address range" either.