Cisco Router — System Configuration Dialog —

If you don’t want to use  the CLI, just say ‘yes’ to enter the Initial Configuration Dialog. After you say yes, the router will
Would you like to enter the initial configuration dialog?

[yes/no]: y

When configuring your cisco router it is important to note that at any point you may enter a question mark ‘?’ for help and in any confusing command.
Use ctrl-c to abort configuration dialog at any prompt.
Default settings are in square brackets ‘[]’.
Also notice that all basic Management Setup configures, only enough connectivity for management
of the system; Extended Setup will request that  you  input your configurations on each interface of the system.


At this point the router will prompt a command:

Would you like to enter basic management setup?

[yes/no]: n

First, would you like to see the current interface summary?

[yes]: return

Take note that every interface listed with OK? value “NO” does not have a valid configuration

Interface IP-Address OK? Method Status Protocol

FastEthernet0/0 unassigned NO unset up

FastEthernet0/1 unassigned NO unset up

Configuring global parameters:

Enter host name [Router]: TECHSFAIR

In cisco routers, the enable secret is a password used to protect access to

privileged EXEC and configuration modes. This password,

after entered, becomes encrypted in the configuration.

Enter enable secret:


The enable password is used when you do not specify an

enable secret password, with some older software

versions, and some boot images.

Enter enable password:


Please choose a password that is different from the enable secret

Enter enable password:


Let’s stop right here for a moment. Notice that setup mode asks you to

configure two enable passwords, but you should understand that you what you will be really using is only the enable secret password.

The enable password is for pre-10.3 IOS routers. However, you must

configure the password in setup mode, and it must be different. It will never

be used if the enable secret is configured.

The next password is for setting up Telnet sessions to the router. The reason

setup mode has you configure a Telnet (VTY) password is because if a

password for the VTY lines is not set, you cannot by default telnet into a


The virtual terminal password is used to protect

access to the router over a network interface.

Enter virtual terminal password:


Cisco Router User Interface

Configure SNMP Network Management? [yes]:enter or no

Community string [public]:enter

Configure DECnet? [no]:enter

Configure AppleTalk? [no]:enter

Configure IP? [yes]:enter

Configure IGRP routing? [yes]:n

Configure RIP routing? [no]:enter

Configure bridging? [no]:enter

Configure IPX? [no]:enter

The preceding commands can help you configure a protocol if you are not

sure which commands you need to do so. However, using the Command-

Line Interface (CLI) instead of setup mode gives you much more flexibility.

If you have an Async modem card installed in your router, you can have

setup mode configure the modems for you.

Async lines accept incoming modems calls. If you will have

users dialing in via modems, configure these lines.

Configure Async lines? [yes]: n

If your router has an ISDN BRI interface, you will be prompted for the

ISDN switch type to be configured. Here is the router output:

BRI interface needs isdn switch-type to be configured

Valid switch types are:

[0] none……….Only if you don’t want to configure


[1] basic-1tr6….1TR6 switch type for Germany

[2] basic-5ess….AT&T 5ESS switch type for the US/Canada

[3] basic-dms100..Northern DMS-100 switch type for US/


[4] basic-net3….NET3 switch type for UK and Europe

[5] basic-ni……National ISDN switch type

[6] basic-ts013…TS013 switch type for Australia

[7] ntt………..NTT switch type for Japan

[8] vn3………..VN3 and VN4 switch types for France

Choose ISDN BRI Switch Type [2]:

After the switch type is configured, you will be prompted for the interface

configurations, including IP addresses.

The next section of the Extended Setup is configuring the interfaces. We

only have two FastEthernet interfaces on this router, FastEthernet 0/0 and

FastEthernet 0/1.

Configuring interface parameters:

Do you want to configure FastEthernet0/0 interface?


Use the 100 Base-TX (RJ-45) connector? [yes]:return

Operate in full-duplex mode? [no]: y and return

Configure IP on this interface? [yes]:return

IP address for this interface:

Subnet mask for this interface [] :

Class A network is, 16 subnet bits; mask is /


Do you want to configure FastEthernet0/1 interface?


Use the 100 Base-TX (RJ-45) connector? [yes]:return

Operate in full-duplex mode? [no]:y and return

Configure IP on this interface? [yes]:return

IP address for this interface:

Subnet mask for this interface [] :

Class A network is, 16 subnet bits; mask is /


This configuration is very basic, but it will allow you to get a router up and

running quickly. Notice the mask is displayed as /16, which means 16 out of

32 bits are used.

The Extended Setup will now show the running configuration created:

The following configuration command script was created:

#Do showrun

Hostname techsfair

enable secret 5 $1$B0wu$5F0m/EDdtRkQ4vy4a8qwC/

enable password dailytech

line vty 0 4

password kelly

snmp-server community public


no decnet routing

no appletalk routing

ip routing

no bridge 1

no ipx routing


interface FastEthernet0/0

media-type 100BaseX


ip address

no mop enabled


interface FastEthernet0/1

media-type 100BaseX


ip address

no mop enabled

dialer-list 1 protocol ip permit

dialer-list 1 protocol ipx permit



[0] Go to the IOS command prompt without saving this


[1] Return back to the setup without saving this config.

[2] Save this configuration to nvram and exit.

Enter your selection [2]:0

The interesting part of the Extended Setup is the options you get at the end.

You can go to CLI mode and discard the running-config [0];

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