There is the added complication of VM life cycles moving from months/years to weeks/days. So basically, port management is increasingly difficult. Have a look at the following diagram for more details:
The following are some major problems with role issues:
- VMs can result in bridging loops on the network
- VMs could be on the wrong VLANs
- No insight into VM to VM communication is available
- The network admin has no visibility or policy/VLAN control