Chapter4ccna
- 1. Instructor & Todd Lammle Sybex CCNA 640-802 Chapter 4: Cisco’s IOS and SDM
- 2. Chapter 4 Objectives The Cisco router IOS Enhanced editing Administrative functions Hostnames Banners Passwords Interface descriptions Verifying your configuration
- 3. Cisco Router IOS Carries network protocols and functions Connects high-speed traffic between devices Adds security to control access Provides scalability for growth Supplies reliability
- 4. Connecting To A Cisco Router Cisco 2811 Cisco 1841
- 5. Bringing up a Router Boot-up process: 1: POST 2: Looks for the Cisco IOS from Flash memory 3: IOS loads & looks for a valid configuration; startup-config stored in nonvolatile RAM (NVRAM) 4: If a valid config is not found in NVRAM: setup mode
- 6. Setup Mode Basic Management Setup Extended Setup Command-Line Interface
- 7. Command-Line Interface (CLI) More flexible than setup mode. To use the CLI, just say No to entering the initial configuration dialog.
- 8. Logging into the Router User mode: Router> Used mostly to view statistics Privileged mode: Router# Used to view & change router configuration
- 9. Overview of Router Modes Global changes: config terminal or config t Changes made to running-config (DRAM) To change the startup-config (NVRAM) config memory or config mem Note: Any configuration changes need to be placed into RAM. Typing config mem or config net (from a TFTP host) will append the current running-config
- 10. Configuration CLI Prompts Interfaces Sub-interfaces Line Commands Routing Protocol Configurations
- 11. Editing & Help Features
- 12. Editing & Help Features Commands starting with a certain letter Router# c? clear clock configure connect copy Enhanced Editing Commands Router-Command History Gathering Basic Routing Information show version
- 14. Enhanced Editing Commands (cont.)
- 16. Gathering Basic Routing Information
- 17. Administrative Functions The administrative functions that you can configure on a router and switch are Hostnames Banners Password Interface descriptions
- 18. Hostnames & Descriptions Hostnames Router(config)# hostname todd todd(config)# Descriptions Atlanta(config)# int e0 Atlanta(config-if)# description Sales Lan
- 19. Banners Purpose Types exec incoming login motd Delimiting character
- 20. Setting the Passwords 5 passwords: 1st two used to set your enable password Used to secure privileged mode; Router>enable Other three are used to configure a password in user mode via: console port auxiliary port Telnet
- 21. Passwords Enable passwords Router(config)# enable password cisco Router(config)# enable secret cisco Auxiliary Password Console Password Telnet Password Encrypting Your Password Router(config)# service password-encryption
- 22. Interface Descriptions Setting descriptions on an interface is helpful to the administrator and, like the hostname, only locally significant. The description command is a helpful one because you can, for instance, use it to keep track of circuit numbers. Here’s an example: Atlanta(config)# int e0 Atlanta(config-if)# description Sales Lan Atlanta(config-if)# int s0 Atlanta(config-if)# desc Wan to Miami circuit:6fdda4321 You can view the description of an interface either with the show running-config command or the show interface command.
- 23. Router Interfaces Bringing up an Interface no shutdown shutdown show interface Configuring an IP Address on an Interface Router(config)# int e0 Router(config-if)# ip address 172.16.10.2 255.255.255.0 Router(config-if)# no shut Serial Interface Commands clock rate & bandwidth (entered in kilobits )
- 24. Viewing, & Saving Configurations Viewing & Saving Configurations running-config saved in DRAM startup-config saved in NVRAM copy run start sh run sh start erase startup-config
- 25. Verifying Your Configuration Tools: show running-config show startup-config ping show cdp nei detail trace telnet
- 26. Other Verification Methods Verifying with the show interface command Router# show interface ? Verifying with the show ip interface command Router# show ip interface Router# show ip interface brief Router# show controllers
- 27. Summary Go through all the written labs and review questions Review answers in class