Interface Ethernet; Loopback - Planet SGS-6341 Series Command Manual

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 ports1/0/1-8.
Switch(config)#interface ethernet 1/0/1-8
Switch(Config-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 ports1/0/1, 1/0/4-5, 1/0/8.
Switch(config)#interface ethernet 1/0/1, 1/0/4-5, 1/0/8
Switch(Config-Port-Range)#

4.1.6 loopback

Command:
loopback
no loopback
Function:
Enables the loopback test function in an Ethernet port; the "no loopback" command disables the loopback test on
an Ethernet port.
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SGS-6341 Series Command Guide