PLANET WGSW-52040 - Manual (Page 142)

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the ports work in half-duplex mode, supporting back-pressure flow control. If flow control results in serious HOL, the
switch will automatically start HOL control (discarding some packets in the COS queue that may result in HOL) to
prevent drastic degradation of network performance.
Note: Port flow control function is not recommended unless the users need a slow speed, low performance network
with low packet loss. Flow control will not work between different cards in the switch. When enable the port flow
control function, speed and duplex mode of both ends should be the same.
Example:
Enabling the flow control function in ports 1/1-8.
Switch(config)#interface ethernet 1/1-8
Switch(Config-If-Port-Range)#flow control
4.1.5 interface ethernet
Command:
interface ethernet <interface-list>
Function:
Enters Ethernet Port Mode from Global Mode.
Parameters:
<interface-list> stands for port number.
Command mode:
Global Mode
Usage Guide:
Run the exit command to exit the Ethernet Port Mode to Global Mode.
Example:
Entering the Ethernet Port Mode for ports1/1，1/4-5，1/8。
Switch(config)#interface ethernet 1/1;1/4-5;1/8
Switch(Config-If-Port-Range)#