Media Server platform and vmware vCenter server

I have been reading mixed information about which Media Server platform I can use to do VMWare vCenter backups.  Some say windows only some say all platforms supported by Netbackup.

My Environment is Netbackup Enterprise, 7.1.0.4

Master Server - Redhat RHEL 6

(2) Windows 2008 Media servers

(3) Redhat RHEL 6 Media Servers.

I have a location with VMWare 4.1 that I want to use one of my RHEL 6 Media servers for backup.  Is this a supported platform? or am I forced to use a Windows Media Server?

    Thx

        Terry