In my test-lab, the problem was IPv6. I have these components:
- ESXi 6.0U1 -host
- vCenter 6.0U1 running on Server 2012R2 VM, top of the ESXi
- All management components installed on that VM
- Server 2012R2 is on workgroup, running DNS-service, static IPv4 -records to vCenter and ESXi
1.) Disable IPv6 -protocol from vCenter nic.
2.) On vCenter, create new DWORD (32-bit) value to the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\
DisabledComponents
0x20
3.) Disable IPv6 from ESXi
4.) Reboot vCenter and ESXi
After these steps it works. However, this is only workaround. Final fix seems to be create IPv6 -records to DNS.