Router Initial Configuration Wizard

I. Initial Sequence of router startup
　　
When a vro is initialized, The vro performs the following operations:
　　
1) perform power-on self-check from Rom to detect basic operations of CPU, memory, and interface circuit.
　　
2) boot from the ROM and install and download the operating system to the primary storage.
　　
3) if the boot operating system is pre-determined by the boot of the configuration register to be downloaded by flash or the network
　　
Run the boot system command to determine the exact position.
　　
4) the operating system is downloaded to the low-address memory. After the download, the operating system determines the working hardware and software of the router.
　　
And display the results on the screen.
　　
5) the configuration files stored in NVRAM are loaded to the main memory and executed. Configure to start the routing process and provide
　　
Port address and set media features. If there is a valid configuration file in NVRAM, enter the setup session mode.
　　
.
　　
6) then enter the system configuration session to display the configuration information, such as the configuration information of each interface.
　　
　　　
　　
Ii. Setup session
　　
When there is no valid configuration file in NVRAM, The vro automatically enters the setup session mode. Later
　　
Enter setup in the command line for configuration.
　　
The setup command is an interactive command. Each question has a default configuration.
　　
Enter the Input key for configuration. If the system has already been configured, the current configuration value is displayed. If this is the first time
　　
The factory settings are displayed. When "------ more ------" is displayed, type the Space key to continue;
　　
If you exit from setup, type ctrl-C.
　　
　　　
　　
1. Main Parameters of setup:
　　
Configure its general parameters, including:
　　
Host Name: Hostname
　　
Privileged password: Enable Password
　　
Virtual terminal password: virtual terminal Password
　　
SNMP Network Management: SNMP Network Management
　　
IP: IP
　　
IGRP Routing Protocol: IGRP Routing
　　
Rip route protocol: Rip Routing
　　
Decnet: decnet.
　　
　　　
　　
Set the secret and password of the console:
　　
Enable secret
　　
Enable Password
　　
Set the password of virtual terminor:
　　
Line vty
　　
Password
　　
Host Name settings:
　　
Hostname
　　
　　　
　　
2. Setup interface parameters:
　　
Set interface parameters, such as Ethernet port, tokenring port, synchronous port, and asynchronous port. Including IP addresses, sub-accounts
　　
Network blocking and tokengring speed.
　　
　　　
　　
3. Setup description:
　　
After setting the above parameters, the command prompts whether to use the above configuration. If the answer is "yes", the system
　　
Will store the above configuration parameters, the system can use.
　　
　　　
　　
4. SETUP commands:
　　
Show config
　　
Write memory
　　
Write erase
　　
Reload
　　
Setup
　　
　　　
　　
5. Recovery of vro lost Password
　　
The following methods can be restored:
　　
Enable secret password (suitable for 10. 3 (2) or updated version)
　　
Enable Password
　　
Console Password
　　
Modify configuration register (Factory: 0x2102) so that the router ignores the password.
　　
Then you can access the vro to see the Enable password and console password,
　　
Ble secret password is encrypted and can only be replaced. Configuration registe
　　
The R value is 0x142.
　　
　　　
　　
· Running password recovery may cause the system to be down for an hour and a half;
　　
· Connect the console terinal to the Console port of the router, and confirm that the terminal is set to 9600bps, 8
　　
Data bit, no parity, 1 stop bit;
　　
· Show version: configuration register 0x2102 is displayed;
　　
· Shut down and open again. Press "Ctrl + break" to enter the ROM monitor status. The prompt is "> ";
　　
· Type "> O/R 0x142", modify configuration register to 0x142, and ignore the original
　　
Password;
　　
· Type "> initialize" to initialize the vro. After a period of time, the following prompt appears on the vro.
　　
:
　　
"System Configuration diaglog ...... "
　　
Enter "no"
　　
Prompt "Press return to get started! ", Press" enter"
　　
· Enter the privileged Mode
　　
Router> enable
　　
Router # Show startup-config
　　
In this way, you can obtain the password (enable & console password)
　　
· Change Password
　　
"Router # config ter"
　　
"Router (config) # enable secret Cisco"
　　
"Router (config) # enable password cisco1"
　　
"Router (config) # Line con 0"
　　
"Router (config) # password Cisco"
　　
"Router (config) # config-register 0x2102"
　　
"Ctrl + z"
　　
"Router # copy running-config startup-config"
　　
"Reload"
　　
· Use password Cisco to access privileged users.
　　
　　　
　　
Iii. router configuration
　　
1) router Mode
　　
In a Cisco router, the command interpreter is called exec. Exec interprets the command you typed and runs the corresponding
　　
Before entering the exec command, you must log on to the vro. For security reasons, exec Sets
　　
Two Access Permissions: user-level and privileged-level. user-level executable commands are a subset of privileged-level commands.
　　
At the privileged level, you can use: configuration, interface, subinterface, line, rout
　　
Er, router-map, and other commands.
　　
　　　
　　
2) Configuration Mode
　　
Use the config command to enter the configuration mode. After entering this mode, exec prompts you to use the available configuration methods.
　　
For example, terminal, NVRAM, and network, the default mode is terminal mode.
　　
　　　
　　
3) IP routing protocol Mode
　　
In configuration mode, enter the router command to enter the IP address routing protocol mode. The optional routing protocols generally include
　　
: BGP, EGP, IGRP, VPN, Rip, and other dynamic and static routes.
　　
　　　
　　
4) Interface Configuration Mode
　　
You can set many features on each port. The interface configuration command modifies Ethernet, The Ring Plate network, and FDDI.
　　
Or synchronous or asynchronous ports.
　　
　　　
　　
5) password configuration
　　
You can use a password to restrict access to the vro. The password can be set to a specific line or a special privilege.
　　
Xec mode.
　　
Line console 0 command set console terminal Password
　　
Line vty 0 command to set the Telnet virtual terminal Password
　　
Enable-PASSWORD command to set the Privileged EXEC access permission
　　
　　　
　　
6) vro name
　　
Use hostname in configuration mode, for example:
　　
Hostname roupid
　　
　　　
　　
Iv. user help prompt
　　
1. type at the user prompt? Common commands can be listed. The following commands are usually used:
　　
Connect opens a middle-end connection
　　
Disconnect closes an existing Telnet session
　　
Enable entry to privileged level
　　
Exit to exit Exec
　　
Help interactive help System Description
　　
Lock terminal lock
　　
Login logs in as a specific user
　　
Log out of Exec
　　
Ping to send Echo information
　　
Resume resumes an activated Telnet connection.
　　
Show Displays running system information
　　
Running at: displays running system information.
　　
Telnet to open a telnet connection
　　
Set terminal line parameters
　　
Where lists the activated Telnet connections
　　
　　　
　　
2. Help
　　
Upper and lower-level help includes:
　　
Symbol Conversion: the prompt is displayed when an error occurs when you type a command;
　　
Keyword: enter a part of the command word;
　　
Command memory: You can use "" to call up previous commands;
　　
Command Prompt: When the command is incomplete, it is available "? "Substitution