Comment 5 for bug 1539503

Andrey Shestakov (SME in Ironic) told me that Ironic is OK with multi-rack but there should be only one (it can be shared or be configured in controllers group only) baremetal network in the environment. So, the easiest way is to have baremetal network shared between all node network groups. It is default behaviour for now, so it should just be documented.
To eliminate the issue with gateway the default IP range for baremetal network should be changed: it should start with 2 as gateway IP by default is always first IP of the network (now IP range starts with 1). It is not a critical issue though as user can do that by himself (via UI/CLI).