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When oranfstab exists, dNFS control traffic uses the IP address used to mount the NFS share. dNFS data traffic is balanced across the local:path IP address mappings of the NAS server stanza specified in oranfstab to which the database belongs. local IP addresses are set to the IP address of the Ethernet interfaces on the database server that are to be used for the database. path IP addresses must be the IP addresses of the Unity NAS server network interfaces.
A dNFS channel for each of the local:path IP address mappings is created in the database instance. For each channel, the value of the NAS server name in oranfstab is recorded in the dNFS channel metadata.