Chapter 6 Configuring a Router/ Learning About Other Devices/ Managing Cisco IOS Software

1. Chapter 6Configuring a Router/ Learning About Other Devices/ Managing Cisco IOS Software

2. Objectives

3. Command-Line InterfaceCommand Modes

4. Configuring a Router Name

5. Configuring Router Passwords

6. Examining the show Commands • Many show commands can be used to examine the contents of files in the router and for troubleshooting. • In both privileged EXEC and user EXEC modes, the command show ? provides a list of available show commands.

7. Interface Configuration Commands

8. Configuring an Ethernet Interface

9. Importance of Configuration Standards

10. Configuring Interface Descriptions An interface description should identify important information such as a router, a circuit number, or a specific network segment.

11. Login Banners

12. Configuring Message-of-the-Day (MOTD)

13. Host Name Resolution

14. Host Table Configuration

15. Configuration Backup and Documentation

16. The copy running-config tftp Command

17. The copy tftp running-config Command

18. Summary

19. Learning About Other Devices

20. Objectives

21. Cisco Discovery Protocol (CDP) CDP is media and protocol independent, and runs on all Cisco equipment over the Subnetwork Access Protocol (SNAP).

22. Showing CDP Neighbor Entries

23. Implementation, Monitoring, and Maintenance of CDP

24. The show cdp interface Command

25. The show cdp neighbors Command

26. Creating a Network Map • The show cdp neighbors [type number] [detail] command can be used to obtain the following: • Device ID — Address • Port ID — Capabilities • Version — Platform • IP network prefix • VTP management domain name (CDPv2 only) • Native VLAN (CDPv2 only) • Full/Halfduplex (CDPv2)

27. Disabling CDP

28. Troubleshooting CDP

29. The showcdp traffic Command

30. Telnet

31. Telnet Operations

32. Establishing Telnet Connections • To initiate a Telnet session any of the following alternatives can be used: • Denver>connect paris • Denver>paris • Denver>131.108.100.152 • Denver>telnet paris • A hostname table or access to DNS for Telnet must be present for a name to work. Otherwise, the IP address of the remote router must be entered. • Telnet can be used to determine if a remote router can be accessed.

33. Telnet Operations

34. Advanced Telnet Operation Multiple Telnet sessions can be used and suspended with the Ctrl+Shift+6 then x sequence.

35. Testing with the ping Command

36. Testing with the traceroute Command

37. Troubleshooting IP Addressing Issues

38. Summary

39. Managing Cisco IOS Software

40. Objectives

41. Router Startup Sequence

42. Locating IOS Software

43. Using the boot system Command

44. Configuration Register Values The order in which the router looks for system bootstrap information depends on the boot field setting in the configuration register. The default configuration register setting can be changed with the global configuration mode command config-register. Use a hexadecimal number as the argument for this command.

45. Identifying Boot Image Source

46. Software Components in Memory

47. Fields in the IOS Name

48. Managing Configuration Files Using TFTP

49. Managing Configuration Files Using Copy and Paste

50. Managing IOS Images Using TFTP