Cisco Introduction to Networks - Week 2

Console into a Switch and Router

• Students learn basic configurations on switches and routers.
• Commands are provided and demonstrated in the course.

Modes and Prompts

User EXEC Mode

• Initial mode after logging in.
• Prompt: >
• Exit command: exit

Privileged EXEC Mode

• Accessed via the enable command.
• Prompt changes to #.
• Exit back to User EXEC Mode: disable or exit.

Command Overview

Question Mark ?

• Lists available commands in the current mode.
• Page through commands using the spacebar.

Configure Terminal

• Command: configure terminal
• Enters Global Configuration Mode.
• Exit back to Privileged EXEC Mode: end, exit, or Control + C/Z.

Sub-Global Config Modes

• Line VTY 0-15: line vty 0 15
  • Configure virtual terminal connections (Telnet, SSH).
• Line Console 0: line console 0
  • Configure console port.
• Interface Configuration Mode
  • Enter with: interface <type> <number>
  • Example: interface GigabitEthernet 0/0

Show Commands

• Purpose: Display static information about router configuration.
• Important Command: show running-config (or show run)
  • Displays current configuration.
  • Interface status and IP addresses.

Copying and Saving Configurations

• copy running-config startup-config
  • Saves current settings to NVRAM.

Debug Commands

• Show real-time information.
• Use debug followed by a question mark for options.

Setting Time and Restarting

• Learn commands to set clock and restart the router.

Additional Global Configurations

Hostname and Banner

• Set router hostname: hostname <name>
• Set MOTD banner: banner motd "<message>"

Passwords

• Enable Password: enable password <password>
  • Unencrypted.
• Enable Secret: enable secret <password>
  • Encrypted (takes priority over Enable Password).

Service Password Encryption

• Command: service password-encryption
  • Encrypts passwords with type 7 encryption.

Interface Configuration

• Interface GigabitEthernet 0/0
  • Assign IP: ip address <IP> <Subnet>
  • Enable interface: no shutdown

Switch Configuration

Interface VLAN 1

• Configure switch IP for remote access: interface vlan1
  • Assign IP and no shutdown to enable.

Set Default Gateway

• Needed for remote network access.

Helpful Commands

No IP Domain Lookup

• Disables DNS translation when typing commands.

Logging Synchronous

• Prevents logging messages from interrupting command input.

Conclusion

• Week 2 covers essential router and switch configuration commands.
• Practice these commands to become familiar with basic network device management.