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Transcript

  • 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
  • 13. Enhanced Editing Commands
  • 14. Enhanced Editing Commands (cont.)
  • 15. Router Command History
  • 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