The Onfigure Terminal Cisco command

The Cisco command 'configure terminal' is an essential tool for network administrators and engineers, allowing them to configure and customize the behavior of Cisco networking devices. When used in the privileged EXEC mode, this command establishes a configuration session, granting access to a more advanced command-line interface (CLI). This mode is used to modify the device's configuration, including settings related to routing, switching, security, and other networking tasks.

Here's a detailed explanation of how to use and understand the 'configure terminal' command:

1. Syntax:

   • Command Format: configure terminal
   • Parameters: None

2. Purpose:

   • The 'configure terminal' command is primarily used to enter a privileged configuration mode on Cisco devices. This mode provides access to a comprehensive set of commands for modifying the device's configuration, such as defining IP addresses, creating VLANs, and adjusting routing protocols.

3. Usage:

   • To use the 'configure terminal' command, follow these steps: a. Connect to the Cisco device using a Telnet or SSH client. b. Enter privileged EXEC mode by authenticating with the device's password. c. Type the 'configure terminal' command. d. The prompt will change to 'config#' or 'config(config-if)#,' indicating that you have entered configuration mode. e. Navigate through the configuration submodes and make the desired changes using the appropriate commands. f. When you are finished making changes, enter 'end' to exit configuration mode and return to privileged EXEC mode. g. Save the configuration changes to non-volatile memory using the 'copy running-config startup-config' command.

4. Eligible Devices:

   • The 'configure terminal' command is supported on a wide range of Cisco networking devices, including routers, switches, firewalls, and wireless access points.

5. Configuration Submodes:

   • After entering configuration mode, you can navigate through various submodes by using the 'config' command followed by a specific submode name. Some common submodes include:
     • Interface Configuration: config interface
     • Routing Configuration: config router
     • Virtual LAN (VLAN) Configuration: config vlan
     • Routing Protocols Configuration: config router ospf, config bgp, etc.

6. Configuration Hierarchy:

   • The 'configure terminal' command allows you to navigate through a hierarchical configuration tree, where each submode represents a different level. By entering a submode, you can drill down into more specific configuration options.

7. Exit and Save:

   • To exit configuration mode, use the 'end' command. This will return you to the privileged EXEC mode.
   • To save the configuration changes, use the 'copy running-config startup-config' command. This will copy the current configuration from RAM (running-config) to the non-volatile memory (startup-config), ensuring that the changes persist after a device reboot.

By understanding the functionality and usage of the 'configure terminal' command, network administrators can efficiently manage and customize their Cisco devices to meet specific network requirements and ensure optimal performance.

onfigure terminal Usage Examples

The Cisco command 'configure terminal' is used to enter the global configuration mode on a Cisco router or switch. In this mode, you can make changes to the router's or switch's configuration.

Here are some examples of how to use the 'configure terminal' command:

• To enter the global configuration mode:

Router> configure terminal

• To enter the global configuration mode and specify a configuration file to load:

Router> configure terminal load startup-config

• To enter the global configuration mode and specify a configuration file to save to:

Router> configure terminal save running-config to startup-config

• To enter the global configuration mode and specify a configuration file to compare the running configuration to:

Router> configure terminal compare startup-config

• To enter the global configuration mode and specify a configuration file to copy the running configuration to:

Router> configure terminal copy running-config startup-config

• To exit the global configuration mode:

Router> exit

Here are some additional examples of how to use the 'configure terminal' command to make specific configuration changes:

• To configure the router's hostname:

Router> configure terminal
Router(config)# hostname R1
Router(config)# exit

• To configure the router's IP address:

Router> configure terminal
Router(config)# interface ethernet 0/0
Router(config-if)# ip address 192.168.1.1 255.255.255.0
Router(config-if)# exit
Router(config)# exit

• To configure the router's default gateway:

Router> configure terminal
Router(config)# ip default-gateway 192.168.1.254
Router(config)# exit

• To configure the router's RIP routing protocol:

Router> configure terminal
Router(config)# router rip
Router(config-router)# network 192.168.1.0
Router(config-router)# exit
Router(config)# exit

• To configure the router's ACL:

Router> configure terminal
Router(config)# access-list 10 permit tcp any any eq 23
Router(config)# access-list 10 permit tcp any any eq 80
Router(config)# access-list 10 deny any any
Router(config)# exit

• To configure the router's NAT:

Router> configure terminal
Router(config)# ip nat inside source list 10 interface ethernet 0/0 overload
Router(config)# exit

These are just a few examples of how to use the 'configure terminal' command to make configuration changes on a Cisco router or switch. For more information, please refer to the Cisco IOS documentation.