I am managing a new environment where there are two nodes Unicast NLB Windows Server 2003 Unicast NLB Virtual Machine (let say VM1 and VM2).
Previously before I migrate it into ESXi 5.1u1 host, it was running on two different ESX 4.1 host (two different HP BL 380 G6 servers) and running fine (the NLB status are both converged).
But to my surprise, when I migrated both into two different Blade Server (on two different HP BL 460c G8), they cannot ping each other ?
so based on this article: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1556
I have to put it into the same ESXi host to make sure the NLB converged.
Why is that behaviour now changed on vSphere 5.1 ?
previously it was on the two different hosts and working just fine but now I have to host it on the same host.
Any kind of help and suggestion would be greatly appreciated.