LevelOne GSW-2474T - Manual (Page 32)

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This setting determines whether or not GSW-1674T/2474T will be
handling flow control. Set FlowCtrl to Enable for avoiding data
transfer overflow. Or it sets to Disable; there is either no flow control
or other hardware/software management.
When the port is set to forced mode, then the flow control will
automatically set to Disable.
QoS:
In some ports that need to have a high priority to manage the data
transfer, QoS should be change. The default setting of all port QoS is
high, set the QoS to Normal where the ports that do not need to have
a high priority of transferring data.
VLAN Settings (Virtual Local Area Network)
Group individual ports into a small “Virtual” network of their own to
be independent of the other ports. To add a VLAN group, press “Add
Group” button, the new VLAN configuration window will pop out,
you can fill in the description in order to describe this VLAN Group,
check on the port to be a member to this VLAN Group, and press
“Apply” button to execute the setting.
Figure 20. VLAN Group Settings