The basics of Cisco administration

1. Cisco operating modes

User mode (User EXEC): basic access, limited to observation.

Privileged mode (Privileged EXEC): access to configuration and diagnostic commands.

To access: enable or en

Global configuration mode: modification of the system configuration.

To access: configure terminal or conf t

 

2. Basic configuration commands

hostname <name> Set hostname

line console 0

password <password>

login

Enables console authentication. no ip domaine lookup Disables DNS lookup, avoids delays when a command error occurs. enable password <password> Password for privileged access enable secret <password> Password for privileged access, encrypted and therefore more secure.

 

3. Backing up and restoring the configuration

copy running-config startup-config Saves the configuration to NVRAM memory (upon reboot) write memory or wr Saves the configuration to NVRAM memory (upon reboot) show running-config Current configuration show startup-config Configuration upon reboot show version OS version and system information show interfaces Network interface status

 

4. Backup/Restore with a TFTP server

The device will ask you for the server's IP address and the file name.

copy running-config tftp: Backup to a TFTP server copy tftp: running-config Restoring from a TFTP server