If you view the vSwitch (in vCenter) and go to summary tab, what does it say for Total Ports and Available Ports?
Also for the portgroup you're trying to connect to, what does it say for total and available ports?
If you view the vSwitch (in vCenter) and go to summary tab, what does it say for Total Ports and Available Ports?
Also for the portgroup you're trying to connect to, what does it say for total and available ports?