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Chapter 04 - Router Conf
- 1. CONFIGURING AROUTER TS, PHẠM VĂN TÍNH PART8
- 2. Objective Name arouter Set passwords Examine show commands Configure a serial interface Configure an Ethernet interface Execute changes to a router Save changes to a router Configure an interface description Configure a message-of-the-day banner Configure host tables Understand the importance of backups and documentation
- 3. Global Configuration Mode All command-line interface (CLI) configuration changes to a Cisco router are made from the global configuration mode. For Examples: Interface mode Line mode Router mode Subinterface mode Controller mode Router# configure terminal Router(config)# exit : Returns the router to global configuration mode from one of these specific configuration modes Ctrl-Z : Returns the router to privileged EXEC mode
- 4. Overview of RouterModes
- 5. Configuring a routername Router(config)# hostname Tokyo Tokyo(config)#
- 6. Configuring router passwords enable secret <password>
- 7. Examining the showcommands show interfaces – Displays all the statistics for all the interfaces on the router. For example: Router#show interfaces serial 0/1 show controllers serial – Displays information-specific to the interface hardware show version – Displays information about the router and the IOS that is running in RAM show protocol – Displays the global and interface specific status of any configured Layer 3 protocols show startup-config – Displays the saved configuration located in NVRAM show running-config – Displays the configuration currently running in RAM
- 8. Examining the showcommands show clock – Shows the time set in the router show hosts – Displays a cached list of host names and addresses show users – Displays all users who are connected to the router show history – Displays a history of commands that have been entered show flash – Displays information about flash memory and what IOS files are stored there show ARP – Displays the ARP table of the router
- 9. Configuring a serialinterface Enter global configuration mode Enter interface mode Specify the interface address and subnet mask Set clock rate if a DCE cable is connected. Skip this step if a DTE cable is connected. Turn on the interface Router(config)# interface serial 0/0 Router(config-if)# ip address < ip address > < netmask > Router(config-if)# clock rate < clock rates > The available clock rates in bits per second are: 1200, 2400, 9600, 19200, 38400, 56000, 64000, 72000, 125000, 148000, 500000, 800000, 1000000, 1300000, 2000000, or 4000000.
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- 11. Serial Interface ConfigurationExample Router# configure terminal Router(config)# interface serial 0/0 Router(config-if)# ip address 192.168.1.1 255.255.255.0 Router(config-if)# clock rate 56000 Router(config-if)# no shutdown Router(config-if)# exit
- 12. Executing adds, moves,and changes
- 13. Configuring an Ethernetinterface Enter global configuration mode Enter interface configuration mode Specify the interface address and subnet mask Enable the interface Router# configure terminal Router(config)# interface e0 Router(config-if)# ip address 192.168.1.1 255.255.255.0 Router(config-if)# no shutdown Router(config-if)# exit
- 14. Configuring interface description Enter global configuration mode by entering the command configure terminal . Enter specific interface mode (for example interface Ethernet 0) interface ethernet 0 . Enter the command description followed by the information that is to be displayed. For example, XYZ Network, Building 18 . Exit interface mode back to privileged EXEC mode by using the command ctrl-Z . Save the configuration changes to NVRAM by using the command copy running-config startup-config .
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- 16. Configuring message-of-the-day (MOTD) Enter global configuration mode by using the command configure terminal . Enter the command banner motd # The message of the day goes here # . Save changes by issuing the command copy running-config startup-config .
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- 18. Host name resolution to associate a host name with an IP address. A list of host names and their associated IP addresses is called a host table. Host names, unlike DNS names, are significant only on the router on which they are configured.
- 19. Configuring host tables Enter global configuration mode in the router. Enter the command ip host followed by the name of the router and all IP addresses associated with the interfaces on each router. Continue entering until all routers in the network are entered. Save the configuration to NVRAM.
- 20. Copying, editing, andpasting configurations A current copy of the configuration can be stored on a TFTP server. The copy running-config tftp command: Step 1 : Enter the copy running-config tftp command. Step 2 : Enter the IP address of the host where the configuration file will be stored. Step 3 : Enter the name to assign to the configuration file. Step 4 : Confirm the choices by answering yes each time.
- 21. Store Configuration ona TFTP
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- 25. Summary The router has several modes: User EXEC mode Privileged EXEC mode Global configuration mode Other configuration modes The command-line interface may be used to make changes to the configuration: Setting the hostname Setting passwords Configuring interfaces Modifying configurations Showing configurations Setting the Interface descriptions Setting the Login banners and messages-of-the-day