1. Summer Classes Router - Initial Configuration By Roshan Chaudhary Lecturer Islington College

2. Router Configuration Files Running Configuration Contains the real-time configuration of the router and changes made to it. It is present in RAM. Startup Configuration Contains the startup configuration of the router that is required when the router is powered on. Acts as backup of the configuration. Present in NVRAM.

3. Router Configuration Files working of configuration files.

4. CISCO IOS - CLI (Command Line Interface) Modes In order from top to bottom, the major CLI modes are: User Executive mode Privileged Executive mode Global Configuration mode Specific Configuration mode Router> enable Router# configure terminal Router(config)# depends on specific command

5. CISCO IOS - CLI (Command Line Interface) Modes

6. Some Useful Cisco Short-cuts Tab - Completes the remainder of the command or keyword. Ctrl-R - Redisplays a line Ctrl-Z - Exits configuration mode and returns to the Exec. Down Arrow - Allows user to scroll forward through former commands. Up Arrow - Allows user to scroll backward through former commands. Ctrl-Shift-6 - Allows the user to interrupt an IOS process such as Ping or Traceroute. Ctrl-c - Aborts the current command and exits the configuration mode.

7. Basic Router Configuration When configuring a router, certain basic tasks are performed including: Naming the Router Setting passwords Configuring interfaces Configuring a banner Saving changes on a Router Verifying basic configuration and router operations using SHOW commands

8. Basic Router Configuration (contd.) Configure IOS Hostname Router> enable Router# configure terminal Router(config)# hostname CoreRouter Types of Passwords in Cisco: Console password: Limits device access using the console connection. Vty password: Limits device access using Telnet. Enable password: Limits access to the Privileged Exec Mode. Enable Secret password: Encrypted, limits access to the Privileged Exec Mode.

9. Basic Router Configuration (contd.) Configure Console password Router(config)# line console 0 Router(config-line)# password cisco Router(config-line)# exec-timeout Router(config-line)# logging synchronous Router(config-line)# login Configure VTY/Telnet password Router(config)# line vty 0 4 Router(config-line)# password cisco Router(config-line)# exec-timeout Router(config-line)# logging synchronous Router(config-line)# login

10. Basic Router Configuration (contd.) Configure Enable password Router(config)# enable password cisco Configure Secret password Router(config)# enable secret cisco Enabling Encryption Router(config)# service password-encryption

11. Basic Router Configuration (contd.) Configure motd (message of the day) Banner Router(config)# banner motd $ Unauthorized Access is Strictly Prohibited $

12. Basic Router Configuration (contd.) Saving Running-config to Startup-config Router# wror Router# copy running-config startup-config Assigning IP Address to the Interfaces Router(config)# interface fastethernet 0/0 Router(config-if)# ip address 192.168.1.1 255.255.255.0 Router(config-if)# no shutdown Router(config-if)# exit Syntax: Router(config)# interface

13. Basic Router Configuration (contd.) Specifying Description for the Interface Router(config-if)# description This cable is conncted with Block-B To prevent the router from attempting to resolve typing errors, use Router# configure terminal Router(config)# no ip domain-lookup Router(config)# end

14. Basic Router Configuration (contd.) Enabling Local Usernames Router(config)# aaa new-model Router(config)# username admin password ciscoadmin Creating Local Usernames without Password Router(config)# aaa new-model Router(config)# username Roshan nopassword

15. Verifying Basic Router Configuration show version

16. Verifying Basic Router Configuration (contd.) show flash

17. Verifying Basic Router Configuration (contd.) Show interfaces

18. Verifying Basic Router Configuration (contd.) Show ip interface brief

19. Verifying Basic Router Configuration (contd.) show ip route show running-configshow startup-config