For beginners, refer to the CISCO router tutorial.

It is very important to know some common knowledge about CISCO routers. Here we mainly explain the CISCO router tutorial, which provides a detailed analysis from configuration to access methods. This document uses Cisco2620 as an example to describe how to configure the vro and remote access, this article discusses how to use the DHCP service function of the internal network to allocate address information for users who remotely dial in and how to eliminate common router faults.

Initial installation of the CISCO router tutorial

During the first installation, the system automatically enters the Dialog Setup, as prompted on the screen, answer the router name, encrypted super login password, super login password, remote login password, dynamic routing protocol, and the configuration of each interface, and save the configuration. After the vro name appears, run the enable command and enter the super logon password. If the vro name appears, the name is Cisco2620. After the Cisco2620 # prompt is displayed, the vro mode is enabled, now you can configure the vro.

CISCO router tutorialConfigure vro

Type config terminal. The prompt Cisco2620 (config) # appears to enter the configuration mode.

Password setting for the CISCO router tutorial

Cisco2620 (config) # enable secret 123123: Set the privileged mode password to 123123
Cisco2620 (config) # line console 0: Enter the Console port configuration mode
Cisco2620 (config-line) # password 123123: Set the Console port password to 123123
Cisco2620 (config-line) # login: Make the console port configuration take effect
Cisco2620 (config-line) # line vty 0 5: Switch to remote logon Port
Cisco2620 (config-line) # password 123123: Set the remote logon password to 123123
Cisco2620 (config-line) # login: Make the configuration take effect

How to Set up a fast Ethernet port in a CISCO router tutorial

Cisco2620 (config) # interface fastFastethernet 0/0: enter the port configuration mode
Cisco2620 (config-if) # ip address 192.168.1.6 255.255.255.0: Set the ip address and mask
Cisco2620 (config-if) # no shutdown: Enable the port
Cisco2620 (config-if) # exit: exit from Port Configuration Mode

Configure synchronous serial port in the CISCO router tutorial

Cisco2620 (config) # interface serial 0/0: Enter Synchronous serial Port Settings
Cisco2620 (config-if) # ip unnumbered fastFastethernet 0/0: Synchronous Serial Port uses the same ip address as the fast Ethernet port
Cisco2620 (config-if) # encapsulation ppp: sets the data link layer protocol as PPP.

Set up the 16-port Modem dialing module and use the internal DHCP service to allocate addresses to the dial-in users.

Cisco2620 (config) # interface Group-Async1
Cisco2620 (config-if) # ip unnumbered FastEthernet0/0
Cisco2620 (config-if) # encapsulation ppp
Cisco2620 (config-if) # ip tcp header-compression passive: Enable passive IP header compression
Cisco2620 (config-if) # async mode dedicated: works only in asynchronous mode
Cisco2620 (config-if) # peer default ip address dhcp: Forward ip address requests to the DHCP server
Cisco2620 (config-if) # ppp authentication chap: sets authentication as CHAP.
Cisco2620 (config-if) # group-range 33 48: the dial-up group contains 16 ports.
The 16 AM module of Cisco provides a high-density Analog Circuit Access Mode. employees not in the office building can use Modem to dial up the LAN and log on to the server for remote office. The peer default ip address dhcp command allows the dial-in workstation to dynamically obtain the ip address through the DHCP server in the LAN, saving ip address Resources and receiving parameters configured on the DHCP server, for example, if the IP address of the DNS server is configured with a static route pointing to the firewall in global mode, the workstation can also access the Internet through the firewall.

Setting the physical features of the 16 AM Module

Cisco2620 (config) # line 33 48: Enter the Modem port Mode
Cisco2620 (config-line) # session-timeout 30: The timeout value is set to 30 minutes.
Cisco2620 (config-line) # autoselect during-login: Automatic Logon
Cisco2620 (config-line) # autoselect ppp: automatically selects the PPP protocol
Cisco2620 (config-line) # login local: Allow local Password check
Cisco2620 (config-line) # modem InOut: Allow dial-in and dial-out
Cisco2620 (config-line) # transport input all: Specify the transmission protocol
Cisco2620 (config-line) # stopbits 1: Set a stop bit
Cisco2620 (config-line) # flowcontrol hardware: sets the hardware traffic control.