NTA is not able to process flows from the VMware vSwitch because the interfaces on the vSwitch cannot be managed by NPM. Until NPM can add management of these interfaces, we are looking at allowing NTA to accept these flows from the un-manageable interface.
Thwack requests for monitoring vSwitch and VDS
http://thwack.solarwinds.com/message/161041
http://thwack.solarwinds.com/message/115658
http://thwack.solarwinds.com/message/168760