PLANET WGSW-52040 - Manual (Page 143)

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4.1.6 loopback
Command:
loopback
no loopback
Function:
Enables the loopback test function in an Ethernet port; the no command disables the loopback test on an Ethernet
port.
Command mode:
Port Mode.
Default:
Loopback test is disabled in Ethernet port by default.
Usage Guide:
Loopback test can be used to verify the Ethernet ports are working normally. After loopback has been enabled, the
port will assume a connection established to itself, and all traffic sent from the port will be received at the very same
port.
Example:
Enabling loopback test in Ethernet ports 1/1-8.
Switch(config)#interface ethernet 1/1-8
Switch(Config-If-Port-Range)#loopback
4.1.7 mdi
Command:
mdi {auto | across | normal}
no mdi
Function:
Sets the cable types supported by the Ethernet port; the no command sets the cable type to auto-identification. This
command is not supported on combo ports and fiber ports.
Parameters: