Is this the kb you followed?
How to change the IP address of an interface in 7 mode system?
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_change_the_IP_address_of_an_interface_in_7_mode_system
Is this the kb you followed?
How to change the IP address of an interface in 7 mode system?
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_change_the_IP_address_of_an_interface_in_7_mode_system