Pull Request: https://github.com/vyos/vyos-1x/pull/468
The configuration option "source-interface" maps to "src_interface" on the command line which is invalid, it should map to "dev".
The configuration option "source-address" forces the "nolearning" flag, which will break most switches with hardware vtep features. If we want to offer this flag, it should have it's own configuration.
Setting "remote" and "source-address" results in only "remote" being applied, even though "source-address" saves to the configuration.
Erroring out on "group" / "src_interfaces" should only happen when one of them is configured, not when the general configuration is incomplete. Otherwise the error message is rather cryptic.