Understanding port groups
Port groups contain director and port identification and belong to a masking view. Ports can be added to and removed from the port group. Port groups that are no longer associated with a masking view can be deleted.
Note the following recommendations:
Port groups should contain four or more ports.
Each port in a port group should be on a different director.
A port can belong to more than one port group. However, you cannot mix different types of ports (physical FC ports, virtual ports, and iSCSI virtual ports) within a single port group.