The following table lists some of the most important basic Cisco Catalyst switch configuration commands.
| Command | Description |
|---|---|
| interface vlan 1 | Global command. Moves the user to interface configuration mode for a VLAN interface. |
| ip address address subnet-mask | Interface configuration mode command that sets the IP address for in-band switch management. |
| ip default-gatewayaddress | Global command that sets the default gateway so that the management interface can be reached from a remote network. |
| interface fastethernet 0/x | Puts the user into interface configuration mode for that interface. |
| duplex {auto | full | half} | Interface configuration mode command that sets the duplex mode for the interface. |
| speed {10 | 100 | 1000 | auto| nonegotiate} | Interface configuration mode command that sets the speed for the interface. |
| switchport port-security mac-addressmac-address | Interface configuration mode command that statically adds a specific MAC address as an allowed MAC address on the interface. |
| switchport port-security mac-address sticky | Interface subcommand that tells the switch to learn MAC addresses on the interface and add them to the configuration for the interface as secure MAC addresses. |
| switchport port-security maximumvalue | Global command that sets the maximum number of static secure MAC addresses that can be assigned to a single interface. |
| switchport port-security violation {protect | restrict | shutdown} | Global configuration command that tells the switch what to do if an inappropriate MAC address tries to access the network through a secure switch port. |
| hostname name | Sets the switch’s host name. |
| line con 0 | Global command that places the user in console configuration mode. |
| line vty 0 15 | Global command that places the user in vty configuration mode. |
| login | Console or vty configuration mode command that tells the switch to ask for a password for a console user or Telnet user, respectively. |
| password password | Console or vty configuration mode command that sets the password required. |
| enable secret password | Global command that sets the switch’s enable password. The password is stored in a hashed format, meaning that someone reading the configuration file will not see the correct text password. |
| enable password | Global command that sets the switch’s enable password. The enable secret password is used if both are configured. |
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