Allied Telesis AlliedView-EMS 4.0.1 VLAN MANAGER - Manual (Page 37)

• The current firmware version allows you to pre-configure switches that may
be added to the stack in the future. Pre-configured switches are identified by
a "Non-Existing" label that appears above the device panel in the Add VLAN
and Modify VLAN dialog boxes. Ports on pre-configured switches can be included
in a VLAN provided they are not members of a port channel. Any attempt
to associate a pre-configured switch port that is a member of a port channel
to a VLAN will result in the error message: "Port is a ghost port
that belongs to a Port-Channel."
6 Device Support
AlliedView™-EMS 4.0.1 VLAN MANAGER USER’S GUIDE Page 37 of 72