Using PowerShell: https://www.dtonias.com/dhcp-server-migration/
Using netsh: https://www.dtonias.com/export-import-dhcp-server-2016-settings/
netsh
https://www.it-admins.com/windows-2016-dhcp-load-balancer-and-its-quirks/
http://www.technig.com/configure-dhcp-failover-on-windows-server/