Can I use the only the Assurance of the DNA not the Fabric without the ISE for Wired and Wireless ?
The Customer needs to use it as Monitoring only not Fabric and don't need to buy the ISE
Here you will find a guildeline / workflow how to enable Cisco DNA-Center Assurance, discover devices, etc.:
The devices should be configured for assurance automatically when performing a discovery job from DNAC IF device controllability is enabled. If device is discovered without device controllability enabled, you can manually specify and enable the telemetry profile for the device in order to enable assurance.
DNAC integration with ISE for assurance allows us to retrieve additional assurance data for wired clients, not wireless clients.