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 Cisco Routers

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Mesaj Sayısı : 53
Kayıt tarihi : 09/12/09
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Nerden : kocaeli

MesajKonu: Cisco Routers   Salı Ara. 15, 2009 8:35 pm

Cisco Routers
Routers are basically used to connect different networks by exchanging the routing information with each other. Router is a network layer device maintains a database called IP routing table by learning the ip addresses of directly connected networks by default. After enabling the IP Routing process, the learned networks can also be seen in the IP routing table by exchanging the IP routing information.
As you know Cisco is the worldwide leader in providing routers, switches and other networking devices. Cisco routers are known as the best solution for any type of WAN environment. Cisco routers are manageable devices with a command line interface based Cisco IOS software. The Cisco IOS software is a command line interpreter to perform different commands generating any type of output.
Cisco Routers Series
Cisco introduces different series of routers for providing the industry solution. The series varies by capabilities, port density and IOS software. You can divide the cisco router series for providing solutions of three types of environments. First is the home office solution or telecommuter solution. In this category the cisco router 700 series, 800 series and 1000 series are included. The second is the branch office or small office solution started from 1600 series modular router including 2500 series router and 2600 series modular router till 3600 series modular router. The third category is the head office or central site solution including 5300 series AS, 7200 series modular router and 12000 series GSR router.
Here are different series of Cisco Routers that are most commonly used in the industry for different type of solutions:
Cisco 700 series router with an ISDN BRI port
Cisco 1000 series router with an ISDN BRI port
Cisco 1600 series router with an extra unscratched module
Cisco 2500 series branch office solution router with one AUI Ethernet and two serial ports
Cisco 2600 series modular router with an unscratched WAN Interface Card (WIC)
Cisco 3600 series modular router with the support of FXO and FXS Voice port
Cisco 5300 series Access Server router with Async port
Cisco 7200 series central site solution router with multiple unscratched modules
Cisco 12000 high end series router with GSR capabilities
Cisco Router Configuration Commands
You should have to know the basic configuration of Cisco router with the Cisco IOS configuration commands and the operational Cisco router commands to surely execute the performance of any internetwork.
Here are some basic cisco router configuration commands along with operation commands of routers:
IP address [address][subnet mask]: This command is used to configure the ip address of the specific interface of the cisco router
Hostname [name]: This command is used to assign a hostname to the cisco router
Line vty 0 15: This command is used to enter in the line vty configuration mode of the cisco router
Line con 0: This command is used to enter line console configuration mode of the cisco router
Line aux 0: This command is used to enter line auxiliary configuration mode of the cisco router
Login: This command tells to ask for the password of a line of the cisco router
Password [password]: This command is used to set the password of a line of the cisco router
Enable password [password]: This command is used to set the password to enter in the privileged exec mode of the cisco router
Enable secret [password]: This command is used to set the encrypted password to enter in the privileged exec mode of the cisco router
Configure terminal: This command is used to enter in the global configuration mode of the cisco router
Show interfaces serial 0: This command displays the status of specific interface of the cisco router
Show interfaces: This command displays complete information about all the interfaces in the cisco router
Show ip interface brief: This command displays the brief ip configuration of all the interfaces of cisco router
Show running-config: This command displays the status of RAM, the current configuration of the cisco router
Show ip route: This command displays the IP routing table of the cisco router
Show startup-config: This command displays the status of NVRAM, the saved configuration of cisco router
Show version: This command displays the hardware and software status of the cisco router
Show flash: This command displays the files and directories reside in the flash of the cisco router
Show history: This command displays the last ten commands that were performed in the cisco router
Erase startup-config: This command is used to erase the saved configuration of cisco router.
Assigning IP to Cisco 2509 Router
Routers have different interface and each interface connects with a network therefore each interface should have its own ip configurations. For assigning ip to the Cisco 2509 router you should perform this set of commands. Router2509 (config) # interface serial 0
Router2509 (config-if) # ip address 10.0.0.1 255.0.0.0
How Will You Configure a New Cisco Router ?
To configure a Cisco router is very simple. The console port of the Cisco router should be connected with the com port of your computer by using the UTP roll over cable. After the physical connection has been made open HyperTerminal to make a session and give any name to it. The com port must be on Restore Default settings in the properties of com port and press enter key. You will see that the setup mode of the cisco router will run on your terminal. Go through the setup mode with the help of configuration dialogue. The basic configuration includes the configuring of hostname, configuring the enable secret password, enable password and the line vty password and the configuration of each interface of the cisco router.
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