Backup best practice for an Oracle Exalogic

I'm running Netbackup 7.6.0.3 Enterprise on RHEL 6. My organization has an Oracle Exalogic with many virtual servers running on it. Does Symantec have a best practice for how to back these appliances up? Is it something that Netbackup can have credentials created on a compute node and back them up using the Exalogic's native snapshot and NDMP capabilities using a NDMP policy in Netbackup? If not, is my only option of backing up these VM's to do it from within the VM like a traditional physical server backup?

Thanks!