CCNA basic switch configuration commands

Basic routing and switching configurations
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CCNA basic switch configuration commands sheet.

Command	descriptions
switch>?	The ? works here the same as in a router Used to get the list of all available commands
switch>enable	User mode, same as a router
switch#	Privileged mode
switch#disable	Leaves privileged mode
switch>exit	Leaves user mode
switch#show version	Displays information about software and hardware.
switch#show flash:	Displays information about flash memory (will work only for the 2900/2950 series).
switch#show mac-address-table	Displays the current MAC address forwarding table .
switch#show running-config	Displays the current configuration in DRAM.
switch#show startup-config	Displays the current configuration in NVRAM.
switch#show vlan	Displays the current VLAN configuration.
switch#show interfaces	Displays the interface configuration and status of line: up/up, up/down, admin down.
switch#show interface vlan1	Displays setting of virtual interface VLAN 1, the default VLAN on the switch.
To Reset Switch Configuration
Switch#delete flash:vlan.dat	Removes the VLAN database from flash memory.
Delete filename [vlan.dat]?	Press Enter
Delete flash:vlan.dat? [confirm]	Press Enter
Switch#erase startup-config	Erases the file from NVRAM.
Switch#reload	Restarts the switch.
To Set Host Names
Switch#configure terminal	Moves to global configuration mode
Switch(config)#hostname Switch1	Creates a locally significant host name of the switch. This is the same command as the router.
Switch1(config)#
To Set Passwords
Switch(config)#enable password vinita	Sets the enable password to vinita
Switch(config)#enable secret nikki	Sets the encrypted secret password to nikki
Switch(config)#line console 0	Enters line console mode
Switch(config-line)#login	Enables password checking
Switch(config-line)#password vinita	Sets the password to vinita
Switch(config-line)#exit	Exits line console mode
Switch(config-line)#line vty 0 4	Enters line vty mode for all five virtual ports
Switch(config-line)#login	Enables password checking
Switch(config-line)#password vinita	Sets the password to vinita
Switch(config-line)#exit	Exits line vty mode
Switch(config)#
To Set IP Addresses and Default Gateways
Switch(config)#interface vlan1	Enters the virtual interface for VLAN 1, the default VLAN on the switch
Switch(config-if)#ip address 192.168.0.10 255.255.255.0	Sets the IP address and netmask to allow for remote access to the switch
Switch(config-if)#exit
Switch(config)#ip default-gateway 192.168.0.5	Allows IP information an exit past the local network
To Set Interface Descriptions
Switch(config)#interface fastethernet 0/1	Enters interface configuration mode
Switch(config-if)#description Finance VLAN	Adds a description of the interface
To Set Duplex Operation
Switch(config)#interface fastethernet 0/1	Moves to interface configuration mode
Switch(config-if)#duplex full	Forces full-duplex operation
Switch(config-if)#duplex auto	Enables auto-duplex config
Switch(config-if)#duplex half	Forces half-duplex operation
To Set Operation Speed
Switch(config)#interface fastethernet 0/1
Switch(config-if)#speed 10	Forces 10-Mbps operation
Switch(config-if)#speed 100	Forces 100-Mbps operation
Switch(config-if)#speed auto	Enables autospeed configuration
MAC Address Table
switch#show mac address-table	Displays current MAC address forwarding table
switch#clear mac address-table	Deletes all entries from current MAC address forwarding table
switch#clear mac address-table dynamic	Deletes only dynamic entries from table