Switch Configuration Command List

Switch Configuration Command List

The following table lists common switch configuration commands:

Task	Command
Move to interface configuration mode	switch(config)#interface FastEthernet 0/14 switch(config)#interface GigabitEthernet 0/1
Move to configuration mode for a range of interfaces	switch(config)#interface range fastethernet 0/14 - 24 switch(config)#interface range gigabitethernet 0/1 - 4 switch(config)#interface range fa 0/1 - 4 , 7 - 10 switch(config)#interface range fa 0/8 - 9 , gi 0/1 – 2
Set the port speed on the interface	switch(config-if)#speed 10 switch(config-if)#speed 100 switch(config-if)#speed 1000 switch(config-if)#speed auto
Set the duplex mode on the interface	switch(config-if)#duplex half switch(config-if)#duplex full switch(config-if)#duplex auto
Enable or disable the interface	switch(config-if)#no shutdown switch(config-if)#shutdown
Show interface status of all ports	switch#show interface status
Show line and protocol status of all ports	switch#show ip interface brief

Be aware of the following switch configuration details:

• All switch ports are enabled (no shutdown) by default.
• Port numbering on some switches begins at 1, not 0. For example, FastEthernet 0/1 is the first FastEthernet port on a 2960 switch.
• Through auto-negotiation, the 10/100/1000 ports configure themselves to operate at the speed of attached devices. If the attached ports do not support auto-negotiation, you can explicitly set the speed and duplex parameters.
• If the speed and duplex settings are set to auto, the switch will use auto-MDIX to sense the cable type (crossover or straight-through) connected to the port and will automatically adapt itself to the cable type used. When you manually configure the speed or duplex setting, it disables auto-MDIX so you will need to be sure to use the correct cable.
• The 2960 switch always uses the store-and-forward switching method. On other switch models, you might be able to configure the switching method.