[ceph-users] Cephadm cluster network

I am new to Ceph so I hope this is not a question of me not reading the documentation well enough. I have setup a small cluster to learn with three physical hosts each with two nics. The cluster is upp and running but I have not figured out how to tie the OSD:s to my second interface for a separate cluster network, as it is now all communication goes thru the public network. Is it possible to define the cluster network with cephadm in some way? /Jimmy