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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)#
3.1.6 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
3.1.7 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: auto indicates auto identification of cable types; across indicates crossover
cable support only; normal indicates straight-through cable support only.
Command mode: Port Mode.
Default: Port cable type is set to auto-identification by default.
Usage Guide: Auto-identification is recommended. Generally, straight-through cable is
used for switch-PC connection and crossover cable is used for switch-switch connection.
Example: Setting the cable type support of Ethernet ports 1/1-8 to straight-through cable
only.
Switch(config)#interface ethernet 1/1-8
Switch(Config-If-Port-Range)#mdi normal