This is a part of the post of how to install R12.1.3 from a VM template.
This step is only needed if you don’t already have a DNS server on your network.
I just installed this on the notebook where I also has the OVM running.
The DNS server is needed as when you create the VM for the apps layer you can only enter a host and domain name and not a IP number.
Download from here: http://www.vercot.com/~serva/default.html
Install and do this setup:
Change you settings in your control panel:
In c:\windows\system32\drivers\etc\hosts put:
192.168.1.110 hpserverdb hpserverdb.kentw.com
192.168.1.120 hpserverapps hpserverapps.kentw.com
Any address which is not in the hosts file will be lookup up via the gateway 192.168.1.1 which is your router.