We have a new server installation.
We running a lot of servers Windows 2008r2 in the Esxi 5.1 Vmware, some times the users say me that the RDP session it freeze for 10 seconds aprox. User connect with Cisco Ipsec Client for windows.
We found in the Aplication Event Viewer log this message:
"[ warning] [vmusr:vmusr] Error in the RPC receive loop: RpcIn: Unable to send."
And in the System Event Viewer log this message with the same time:
"The Terminal Server security layer detected an error in the protocol stream and has disconnected the client. Client IP: 192.168.xxx.xx."