Basically any Unicast communications from one VM to another is not being received when they sit on separate hosts. This is true for NLB as well as a new service we have introduced to our network. Dynamics AX AOS clustering. When the AOS servers are on different hosts the performance is severely degraded and the application becomes unusable. Has anyone else come across this type of scenario? VMware has a couple of KB's on it outlining this problem however I would like to get another perspective on this issue.