Hi, I am trying to setup ovirt as shown below. DataCenter1 ---------Cluster1 -----host1 ---- NFS1-Data Domain | |-----Cluster2 ------host2-----NFS2-Data Domain As you see in above case I am trying to attach both NFS partition to Datacente1 and I got various behaviour: 1> Once one data domain attached to data center other is failing to attached (e.g. let say NFS1-Data Domain is attached to DataCenter1 then after that NFS2-Data Domain failing to attach DataCenter1) 2> And sometime both data domain successfully got attached but after that host2 is not coming up by saying "host1 cannot access to NFS2-Data Domain and hence moving host1 to Non-Operational" host1 firewall rules are : -------------------------------------------------------------------------------------------------- # iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT icmp -- anywhere anywhere ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:54321 ACCEPT tcp -- anywhere anywhere tcp dpt:54322 ACCEPT tcp -- anywhere anywhere tcp dpt:sunrpc ACCEPT udp -- anywhere anywhere udp dpt:sunrpc ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT udp -- anywhere anywhere udp dpt:snmp ACCEPT tcp -- anywhere anywhere tcp dpt:websm ACCEPT tcp -- anywhere anywhere tcp dpt:16514 ACCEPT tcp -- anywhere anywhere multiport dports rockwell-csp2 ACCEPT tcp -- anywhere anywhere multiport dports rfb:6923 ACCEPT tcp -- anywhere anywhere multiport dports 49152:49216 ACCEPT tcp -- anywhere anywhere tcp dpt:sunrpc ACCEPT tcp -- anywhere anywhere tcp dpt:nfs ACCEPT udp -- anywhere anywhere udp dpt:nfs ACCEPT udp -- anywhere anywhere udp dpt:sunrpc ACCEPT udp -- anywhere anywhere udp dpt:892 ACCEPT tcp -- anywhere anywhere tcp dpt:892 ACCEPT tcp -- anywhere anywhere tcp dpt:ospf-lite REJECT all -- anywhere anywhere reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) target prot opt source destination REJECT all -- anywhere anywhere PHYSDEV match ! --physdev-is-bridged reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT) target prot opt source destination -------------------------------------------------------------------------------------------------- Please help me to understand this issue. 1> Do ovirt support multiple-cluster to multiple-storage data domain ? 2> Are those firewall rules correct or wrong ? 3> Can host1 access storage domain created on another cluster say host2 m/c ? (NFS technology) Thanks, ~Rohit