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Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Network Fundamentals
Abdelkhalik Elsaid M...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
What is a Router?
• Front View
• Rear View
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
What is a Router?
Router is a computer wh...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Router’s Memory
• RAM «volatile»: used to...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Router Boot-up Process
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Router’s Interfaces
• Router Interfaces: ...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Cisco IOS - Access Methods
• The most usu...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Console Port
• Examples of console use ar...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Using HyperTerminal
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Auxilary Port
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Cisco IOS Modes
• Cisco IOS is a Modal OS...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Setup mode
• Permit admin to install a mi...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
User executive mode
• Allows only a limit...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Privileged executive mode
• Provides acce...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Global configuration & Specific Configura...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Basic IOS command structure
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Using CLI help
• The IOS has several form...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Context-sensitive help
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Command Syntax Check
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Hot Keys and Shortcuts
• Tab: Completes t...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
IOS examination commands
• Show version
•...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Basic Router Configuration
• Naming the r...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Basic Router Configuration
• Interface co...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Configuring a serial interface
S0/0
S0/1
...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Interpreting the Interface Status
• Other...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
Just Refresh – Enable Mode commands
• cop...
Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
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Network Fundamentals: Ch11 - Configuring and Testing your Network

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In these slides, you will understand the definition of router besides the software and hardware components of Cisco routers.
Understanding Cisco router memory including RAM, ROM, NVRAM, and Flash.
Cisco router OS (IOS) and both the running configuration file and the start-up configuration file.
Router Boot-up Process.
The difference between router interfaces and the management ports such as console and Auxiliary ports.
The most usual Cisco IOS methods using console or aux ports or telnet or SSH for remote access.
Cisco IOS Modes: Setup mode, User executive mode “view only mode”, Privileged executive mode “enable”, Global configuration, and Other specific configuration modes.
IOS examination commands: Show version, Show flash, Show interfaces, Show startup-config and Show running-config.
Configuring message of the day (MOTD) and router interfaces


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Transcript of "Network Fundamentals: Ch11 - Configuring and Testing your Network"

  1. 1. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Network Fundamentals Abdelkhalik Elsaid Mosa abdu.elsaid@yahoo.com http://abdelkhalik.staff.scuegypt.edu.eg/
  2. 2. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy What is a Router? • Front View • Rear View
  3. 3. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy What is a Router? Router is a computer which consists of H/W S/W CPU InterfacesMemory IOS Config File Flash NVRAM RAM ROM LAN WANManagement
  4. 4. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Router’s Memory • RAM «volatile»: used to store 1. Running version of IOS. 2. Running config. File. 3. Routing table. 4. ARP Cache «is used on routers that have LAN interfaces». 5. Packet Buffer. • ROM «permanent»: used to store 1. POST, Basic diagnostic software. 2. Bootstrap. 3. Scaled down Version of IOS «Rxboot». 4. ROMMon. • Flash «Non volatile»: used to store IOS. • NVRAM: used to store Start Up Configuration.
  5. 5. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Router Boot-up Process
  6. 6. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Router’s Interfaces • Router Interfaces: capable of sending and receiving traffic. 1. LAN 2. WAN • Management Ports: used for administrative access. 1. Console 2. AUX
  7. 7. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Cisco IOS - Access Methods • The most usual methods are: 1. Console: Doesn’t require active networking services. 2. AUX port: Doesn’t require active networking services. 3. Telnet or SSH: Requires active networking services.
  8. 8. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Console Port • Examples of console use are: The initial configuration of the network device Disaster recovery procedures and troubleshooting where remote access is not possible. Password recovery procedures.
  9. 9. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Using HyperTerminal
  10. 10. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Auxilary Port
  11. 11. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Cisco IOS Modes • Cisco IOS is a Modal OS. • In order from top to bottom, the modes are: 1. Setup mode. 2. User executive mode “view only mode” 3. Privileged executive mode “enable mode” 4. Global configuration mode 5. Other specific configuration modes
  12. 12. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Setup mode • Permit admin to install a minimal configuration for a router. • The router will enter setup mode when:  Contents of NVRAM erased “erase startup” command.  When the router is “out of the box”. • You can make the router enter setup mode by entering:  Router# setup
  13. 13. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy User executive mode • Allows only a limited number of basic monitoring commands. • Often referred to as a “view only” mode. • Does not allow any commands that might change the configuration of the router. • Identified by the > prompt.
  14. 14. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Privileged executive mode • Provides access to all router commands. • This mode can be configured to require a password. • Global configuration mode and all other more specific configuration modes can only be reached from the privileged EXEC mode. • The privileged EXEC mode can be identified by the # prompt.
  15. 15. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Global configuration & Specific Configuration • Configuration changes are made that affect the operation of the device as a whole.
  16. 16. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Basic IOS command structure
  17. 17. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Using CLI help • The IOS has several forms of help available: 1. Context-sensitive help 2. Command Syntax Check 3. Hot Keys and Shortcuts
  18. 18. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Context-sensitive help
  19. 19. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Command Syntax Check
  20. 20. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Hot Keys and Shortcuts • 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: Scroll forward through former commands. • Up Arrow: Scroll backward through former commands • Ctrl-Shift-6: Interrupt an IOS process such as ping or tracert. • Ctrl-C: Aborts the current command and exits the configuration mode. • Abbreviated commands: Commands can be abbreviated to the minimum number of characters that identifies a unique selection. Ex: sh int = show interfaces
  21. 21. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy IOS examination commands • Show version • Show flash • Show interfaces • Show startup-config • Show running-config
  22. 22. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Basic Router Configuration • Naming the router: Host name should be unique. • Banner: Banner should warn against unauthorized use. • Passwords: Use strong passwords • Privileged mode password • Console Password • Telnet Password
  23. 23. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Basic Router Configuration • Interface configurations: interface type, IP address and subnet mask. Describe purpose of interface. Issue no shutdown command. If DCE serial issue clock rate command.
  24. 24. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Configuring a serial interface S0/0 S0/1 192.168.1.1/30 192.168.1.2/30 RouterA(config)# interface serial 0/0 RouterA(config-if)# ip address 192.168.1.1 255.255.255.0 RouterA(config-if)# no shutdown RouterA(config-if)# clock rate 56000 (required for serial DCE only) RouterA(config-if)# exit RouterB(config)# int serial 0/1 RouterB(config-if)# ip address 192.168.1.2 255.255.255.252 RouterB(config-if)# no shutdown RouterB(config-if)# exit RouterB(config)# exit Router# To know which interface is the DCE : RouterA# show controller s0/0
  25. 25. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Interpreting the Interface Status • Other Interface Status • Serial0/1 is administratively down , line protocol is down  interface is shut down • Serial0/1 is down , line protocol is down  interface or cable H/W failure ( no keep-alives ) • Serial0/1 is up , line protocol is down  different encapsulation type ( PPP , HDLC , FR ) or no clock rate on DCE. Layer 1 status Layer 2 status Interface is working properly
  26. 26. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy Just Refresh – Enable Mode commands • copy running-config startup-config • copy startup-config running-config • erase startup-config • ping ip_address • traceroute ip_address • show interfaces • show version • show arp • show startup-config • show running-config • show ip interface brief • configure terminal • show controllers serial_interface
  27. 27. Suez Canal University – Faculty of Computers & Informatics - Cisco Local Academy
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