D-Link DGS-3100 User Manual page 78

Notes about Trunking on the DGS-3100 Series
DGS-3100 series supports up to 32 LAGs per device (or stack).
NOTE: A port must belong to the default VLAN when the user is adding the port to a LAG, After
adding the port to the LAG, the LAG itself can be joined to other VLAN.
When a port is added to a LAG, the port's configuration is stopping to be active, this configuration will return to be active
only after the port will be removed from the LAG.
NOTE: It is not possible to set the speed or the duplex mode on a LAG.
DGS-3100 Series Gigabit Stackable Managed Switch User Manual
66