We are using Cisco 3750 X series Switch as our DRAC switch. However, this switch is not playing well with the Dell 720X's servers. It works for a very short period of time and them shows a connection problem. The older versions of Cisco switch are working buy not this one. There was no cabling or NIC problem. It has been test all the way. This thing is happening only when we use this types of switches.Why is that?