And "auto" only added in 2018 (https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=ff1ab8edf827f55b86c6487c90b7454975d52236 https://git.kern

And "auto" only added in 2018 (https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=ff1ab8edf827f55b86c6487c90b7454975d52236 https://git.kernel.org/pub/scm/network/iproute2/iproute2.git...).