If this command:

opt/vmware/vcloud-director/bin/cell-management-tool cassandra -configure -create-schema -cluster-nodes xxxxxxxxxx -username root -password xxxxxxxx -port 9042 -ttl 15

Should I perform on every CELLs ? or only on one?

I'm asking because on the first CELL we had success:

and next when we tried to perform that same command on 2nd CELL we received errors: