Disable the Dynamic DNS update feature to be compatible with releases earlier than Data ONTAP 8.3.1
cluster1::*> vserver services name-service dns dynamic-update prepare-to-downgrade Warning: This command will disable dynamic DNS updates on all Vservers, remove all related configurations, and disable the dynamic DNS update feature. Use this command to prepare for downgrading the system to a release earlier than Data ONTAP 8.3.1 only. Do you want to continue? {y|n}: