Aren't these questions typical of a (above average) user who easily cares only to be spoon fed by others while playing with complex systems?
More than one Ethernet physical interface (bonded or not-bonded) is (or could be) used in order to manage respectively Administration, Signalling, Billing and CDR and iRMC...eventually you will find information on "Flexible Ethernet circuit and IP Address Configuration Examples" chapter of "OpenScape Voice V7 Service Manual: Installation and Upgrades" service manual (and this is just an example).
Regarding VMware ESXi 5...AFAIK (and I may be wrong) VMware OSV support was declared up to VMware ESXi 5.1 (In a quite recent OSV document) but I should go deep to find if Siemens references about VMware ESXi 5.5 are eventually available: considering the VMware ESXi 5.x release history (see it
here...please note that latest VMware ESXi 5.1 branch was released in July, 2013) and knowing how slow can be Siemens in adopting latest software release of 3rd Party Components (see what happened with SuSE Linux Enterprise Server 64 bit and OpenScape Office HX/LX) I can argue that (I may be wrong once again) ESXi 5.5 is not yet supported (It may works but Siemens may claim it will not give support if an issue will reported in the case OSV is deployed with ESXi 5.5).
OSV is definitely not a toy (neither when you consider an OSV deployment on a physical machine nor when you will deploy it on a virtual machine to test its features in a pre production environment) and, generally, all users that could really help you here will presume that a minimum basic knowledge (made at least by reading relevant Service Documentations before any installation attempts...and you have a plenty of documentation to start with) is required (if not mandatory) and highly desired.
Best regards, Kimera.
P.S.
To be clear: I'm not an Expert on OSV.