With this feature, you can now configure ethtool options from Red Hat Enterprise Virtualization Manager. Previously, the Manager only configures a small subset of the values of a network interface. Users now have the option to use the ethtool utility to customize their usage of network interface. The engine-config tool has to be used initially for the "ethtool_opts" key to be made available. These custom properties are accessible through the Administration Portal, REST API, and software development kits.