What is the significance of the asterisk next to the VLAN ID description in Virtual Center?
The asterisk only appears if there's a machine in that portgroup.
In the image you can see the my VLAN descriptions match the ID, howver the ID changes to * when a machine is the the portgroup.
Is there a concept I am missing?
You might want to view this thread:
http://communities.vmware.com/thread/63834
I believe that if you run the command "esxcfg-vswitch -l", you will see that the VLAN ID will still be visible as being "assigned" to the portgroup.