Building a new vCloud 1.5 just after vSphere 5 RTM’d, we saw an issue that our guest OS’s were not working. We mapped in HP Virtual Connect Manager to multiple VLANs so that we could use vcdni with vCloud. We could ping the guest VM’s on these VLANs, but we could not do anything else to them.
The issue appears to stem from an Emulex driver & firmware version.
The Solution is that HP has updated their advisory with firmware fixes to get this working
Support Flex-10 or Flex Fabric Adapters on VMware ESXi 5.0 in a Virtual Connect Environment