I have CUOM 2.0.1 managing 3 CCM clusters. I've added the devices in DCR the fields like this:
Display name: CCM-PUB
IP address: 10.1.1.1
But in Operations Manager it only appears with the IP address and not the name I've defined.
The machines are in DNS, though reverse lookup is disabled (company policy). I've even added the machines to CUOM hosts file, but to no avail. All managed machines (CCM, routers, gateways, switches, etc) appear with their IP instead of the hostname.