As far as I am aware, there is no broadcast or multicast traffic involved (at least, I don't see any on my cluster). So there should be no issue with routing it over layer 3. Have you checked the following: - name resolution working on all hosts - firewall/acl rules - selinux - tcpdump the mon traffic (port 6789) to see that it's getting through _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com