1. Configuring a Router Harold Hernandez, MS, CCNI

2. 3.1 Configuring a Router Name a router Set passwords Examine show commands Configure a serial interface Configure an Ethernet interface Execute changes to a router Save changes to a router

3. CLI Command Modes

4. Configuration Modes

5. Lets Play What does it do?

6. Changes the name of the router Router(config)#hostname Tokyo

7. Identifies the console port for configuration. Router(config)#line console 0

8. Tells the router to prompt the user for a password Router(config-line)#login

9. Sets the password to access the line as cisco Router(config-line)#password cisco

10. Identifies telnet sessions 0 to 4 for configuration. Router(config)#line vty 0 4

11. Restricts access to privilaged exec to those who know the password Router(config)#enable password class

12. Restricts access to priv. exec and doesnt show password in clear text when displaying running-config Router(config)#enable secret class

13. Encrypts all passwords so they arent in clear text. Router(config)#service password- encryption

14. Gives info about s0/1 including DCE/DTE end of serial cable Router#show controllers serial 0/1

15. Displays config stored in NVRAM show startup-config

16. Displays configuration in RAM show running-config

17. Specifies interface to be configured. Router(config)#interface serial 0/0

18. Attaches an IP address to an interface Router(config-if)#ip address

19. Establishes a timing mechanism for lab routers Router(config-if)#clock rate 56000 How do you know which router should use this command? Its the router with the DCE cable attached to its serial port!

20. Brings an interface back up after its been configured. Router(config-if)#no shutdown

21. Removes configuration from NVRAM. erase startup-config

22. Copies configuration from RAM to NVRAM Router#copy running-config startup-config

23. 3.2 Finishing the Configuration Configure an interface description Configure a message-of-the-day banner Configure host tables Understand the importance of backups and documentation

24. Documentation The _________ command allows administrators to add comments about a particular interface. Login banners can be used to convey messages that affect all network users, such as scheduled system shutdowns. banner motd # # sends a message to any attached terminal. description

25. Ease of Use _________ are short-cuts that aid administrators when testing routes. By assigning an IP address a name, the admin can ping the name instead of the 32- bit dotted decimal IP address. IP host BW 192.168.1.1 is an example of one such short-cut. Host tables

26. Life is beautiful