For now, Dubbo Protocol has to specify its' name in externalized configuration, e.g:

dubbo.protocols.dubbo.name = dubbo
dubbo.protocols.dubbo.port = 12345

Obviously, dubbo.protocols.dubbo.name=dubbo is unnecessary and could be simplified, thus, if ${id} will be used as protocol name in properties pattern like dubbo.protocols.${id}.*, for instance:

dubbo.protocols.dubbo.port = 12345