You can ssh to the Cisco DNA Center or use the CIMC KVM Console (since you are changing the IP address) and run the configuration " maglev-config update " script.
Note: changing IP address(s) and then saving cause loss of connectivity when the Netorking changes are applied. So it would be recommended to use the CIMC KVM Console.
$ ssh maglev@dnac.ip.address -p 2222
$ maglev login
$ sudo maglev-config update
Also to note, You can not make changes to the Network Adapter IP configuration that was checked as the "cluster link"". No changes can be made to this Network Adapter or VIP address. A complete rebuild would be necessary.
In addition, if you make an IP address change to the Enterprise IP or VIP and these were used for connectivity for Assurance and other related configurations, this could possibly impact services on the network devices. This may require reprovisioning on the Network Devices.
If this is in Production, make sure you have an adequate maintenance window in place in event your changes impact services and you have time to remediate the issues.
Install and Upgrade Guides
https://www.cisco.com/c/en/us/support/cloud-systems-management/dna-center/products-installation-guides-list.html
Look for
"Reconfigure the Appliance Using the Configuration Wizard"
in the Install Guide
