The 'has_primary_interface?' method has been deprecated, so any attempt to use it results in the error "undefined method" being thrown. In Red Hat Satellite 6.2, each host automatically gets a primary interface when it is created, so this method is no longer required. Instead, the following tests whether the interface has an identifier: host.primary_interface.identifier.empty? The whole network interface object is available via the method: host.primary_interface.