Cisco Network Tutorial: detailed analysis of router configuration

As a port device connecting WAN, vrouters have been widely used. Their main function is to connect multiple independent networks or subnets to achieve optimal routing and datagram transmission between the Internet. This article takes the Cisco 2511 vro as an example to introduce four router configuration methods.

1. Use the Cisco router master port OSOLE to connect VT100 and compatible terminals for configuration.

This is a simple configuration method. After the terminal and the router are reliably connected, the power of the terminal and the router is turned on, and the START process of the router is displayed on the terminal, when the symbol ">" appears, you can configure the vro on the terminal. If the vro startup process is not displayed on the terminal, it may be because the communication port parameter configuration is incorrect and you need to reconfigure it.

2. Configure through the terminal simulation program of Win 3.x or Win 95

Start Win 3.X, double-click "accessories" with the mouse, then double-click "terminal simulation program", click "Settings", in the drop-down menu "terminal simulation" select DEC VT-100 [ANSI], select parameters in "communication:

Baud Rate: 9600; Data bit: 8; stop bit: 1; Parity: none; traffic control: Xon/Xo ff; connection interface: COM1 or COM2 (depending on the actual connection ).

After the preceding parameters are configured, click "file", click "save" in the drop-down menu, name the configuration file, select the path, and click "OK ". You only need to open the configuration file and press enter to enter the configuration of the vro.

The configuration method of Win 95 is similar to that of Win 3.x.

3. Configure through Terminal simulation Telnet on TCP/IP network

The Telnet terminal simulation program is available on UNIX, OS/2, Win 95, and other operating systems. telnet 145.1.1.5 (IP address of the router) is run on the host on the network ), enter the correct password to log on to the vro on the network for configuration. If "password required, but none set" is displayed, it indicates that the password is not defined in vty 04 of the router and must be added.

4. Use the configuration file downloaded by the TFTP Server for configuration.

The UNIX and OS/2 operating systems provide the TFTP server function. Taking OS/2 as an example, running ftfpd in the DOS window of OS/2 shows:

IBM TCP/IP OS/2-TFTP Server version 19:50:56 ON dEC 7 1995 is ready to log ON to the vro in the first three ways. When ">" appears, you can configure it. The following is a configuration instance.

Router> en

Password: abcdefg (privileged user password)

Roture # copy ftfp runnig-config (copy the configuration file on the TFTP server to the running configuration of the vro)

Host or network configuration file [host]? Host

Address of remote host [255.255.255.255]? 145.1.1.1 (Host IP address)

145.1.1.1 is the server running TFTP and the host where the router configuration file is located.

If the prompt "There are no usable interface configured for ip" appears, it indicates that the Ethernet 0 (Ethernet port) of the router is not configured properly.

Configure Ethernet 0:

Router # conf t

Router (config) # int e0

Router (config-if) ip address 145.1.1.5

Router (config-if) # no shutdown

Router (config-if) # exit

Router (config) # exit

Router # wr (save to startup configuration)

Name of configuration file [router-config]? 2511 (configuration file name)

Configure using 2511 from 145.1.1.1? [Confirm]

Display:

Loading 2511 from 145.1.1.1 (via Ethernet0)

[OK-1553/32723 bytes]

Copy the running configuration to the startup configuration file NVRAM:

Router # copy runnig-config startup-config

Enter Router # I or re-enable the vro power to restart the vro.

Back up the running configuration to the server:

Router # copy runnig-config ftfp

Remote host [] 145.1.1.1

Name of configuration file to write

[Router-config] 2511bf

Write file 2511bf on host 145.1.1.1? [Confirm]

Display: Writing 2511bf !! [OK] Now, The vro configuration is complete.

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