Cisco 2501 - Router - EN Manual de usuario

CHAPTER

Configuring the Cisco 2500 Series Access Server 4-1

Configuring the Cisco 2500

Series Access Server

This chapter describes the procedures for configuring the Cisco 2500 series access server

and contains the following sections:

•Booting the Access Server for the First Time

•Using the Enable Secret and the Enable Password

•Configuring the Access Server

To configure your console, you need to connect a terminal to the access server.

Configuration requires access to the console port.

If You Need More Information

The Cisco IOS software running the access server contains extensive features and

functionality. The effective use of many of many of these features is easier if you have more

information at hand. We recommend to you the following resources:

•UniverCD

•Cisco Information Online (CIO)

•Technical Assistance Center (TAC)

4-2 Cisco 2500 Series Access Server User Guide

If You Need More Information

Additional Publications

For more information on configuring the Cisco 2500 series access server, see the appendix

“Internetworking Primer,” or refer to the following publications:

•Access and Communication Servers Configuration Guide

•Access and Communication Servers Command Reference

•Configuration Builder Getting Started Guide

•Router Products Getting Started Guide

•Router Products Configuration Guide

•Router Products Command Reference

•Troubleshooting Internetworking Systems

These publications are available on UniverCD.

All Cisco technical documentation and additional literature are available on UniverCD,

Cisco’s online library of product information. UniverCD is updated and shipped monthly,

so it might be more up to date than printed documentation. UniverCD is available both as

a single CD and as an annual subscription. To order UniverCD, contact your local sales

representative or call Customer Service.

Contacting Customer Service

To obtain general information about Cisco Systems, Cisco’s products or documentation, or

upgrades, call 800 553-6387 or 408 526-7208. Customer Service hours are 5:00 a.m. to

6:00 p.m. Pacific time, Monday through Friday (excluding company holidays). You can

also send e-mail to [email protected].

Using Cisco Information Online

Cisco Information Online (CIO) is Cisco Systems’ primary, real-time support channel.

Maintenance customers and partners can self-register on CIO to obtain additional content

and services.

Configuring the Cisco 2500 Series Access Server 4-3

If You Need More Information

Available 24 hours a day, 7 days a week, CIO provides a wealth of standard and value-added

services to Cisco’s customers and business partners. CIO services include product

information, software updates, release notes, technical tips, the Bug Navigator,

configuration notes, brochures, descriptions of service offerings, and download access to

public and authorized files.

CIO serves a wide variety of users through two interfaces that are updated and enhanced

simultaneously—a character-based version and a multimedia version that resides on the

World Wide Web (WWW). The character-based CIO (called “CIO Classic”) supports

Zmodem, Kermit, Xmodem, FTP, Internet e-mail, and fax download options, and is

excellent for quick access to information over lower bandwidths. The WWW version of

CIO provides richly formatted documents with photographs, figures, graphics, and video,

as well as hyperlinks to related information.

You can access CIO in the following ways:

•WWW: http://www.cisco.com.

•Telnet: cio.cisco.com.

•Modem: From North America, 408 526-8070; from Europe, 33164464082.Usethe

following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and

baud rates up to 14.4 kbps.

For a copy of CIO’s Frequently Asked Questions (FAQ), contact [email protected].

For additional information, contact [email protected].

Contacting the Technical Assistance Center

If you are a system administrator and need personal technical assistance with a Cisco

product which is under warranty or covered by a maintenance contract, contact Cisco’s

Technical Assistance Center (TAC) at 800 553-2447 or 408 526-7209, or send an e-mail

message to [email protected]. Emergency technical assistance (for network-down or severe

network problems) is available 24 hours a day, 7 days a week.

When you contact the TAC for help, have the following information ready:

•Chassis serial number

•Maintenance contract number

4-4 Cisco 2500 Series Access Server User Guide

Booting the Access Server for the First Time

•Software version level and hardware configuration (enter the show version command

to display this information)

•Software configuration (enter the show running config (Release 11.0 or later) or the

write terminal command (Earlier than Release 11.0) to display this information)

Contacting the European Technical Assistance Center

Cisco and its European Service Partners coordinate all customer service in Europe,

including hardware and software telephone technical support, onsite service, and module

exchange and repair. For more information, contact the European TAC.

European TAC numbers and e-mail address are as follows:

•Phone: 32 2 778 42 42

•Fax: 32 2 778 43 00

•E-mail: [email protected]

Booting the Access Server for the First Time

The access server is administered using the Cisco command interpreter, called the EXEC.

You must log in to the access server before you can enter an EXEC command. For security

purposes the EXEC has two levels of access to commands, user EXEC mode and privileged

EXEC mode.

To enter the privileged mode you must enter the enable secret password on systems running

Cisco Internetwork Operating System (Cisco IOS) Release 10.2(3) or later, or the enable

password on systems running Cisco IOS releases prior to 10.2(3) or when using the boot

ROM monitor.

Using the Enable Secret and the Enable Password

The commands available at the user level are a subset of those available at the privileged

level. Because many privileged-level EXEC commands are used to set operating

parameters, you should password-protect these commands to prevent unauthorized use.

Configuring the Cisco 2500 Series Access Server 4-5

Configuring the Access Server

There are two commands you can use to do this, depending on the release you have of the

Cisco IOS software:

•enable secret password (which is a very secure, encrypted password).

•enable password (which is a less secure, or nonencrypted, password).

The enable secret password is available in Cisco IOS Release 10.2(3) or later. The enable

secret password is not available before Release 10.2(3). The enable password is available

in all releases. You must enter the correct password to gain access to privileged-level

commands.

On systems running Release 10.2(3) or later, the enable secret password is used. when you

are running from the boot ROM, the enable password might be used depending on your

ROM level.

The passwords should be different for maximum security. If you enter the same password

for both during the setup script, the system will accept it, but you will receive a warning

message indicating that you should enter a different password.

An enable secret password can contain from 1 to 25uppercaseandlowercasealphanumeric

characters; an enable password can contain any number of uppercase and lowercase

alphanumeric characters. In both cases, a number cannot be the first character. Spaces are

also valid password characters; for example, “two words” is a valid password. Leading

spaces are ignored; trailing spaces are recognized.

If you lose or forget your enable password, see the section “Recovering a Lost Enable

Password” in the chapter “Maintaining the Cisco 2500 Series Access Server.”

Configuring the Access Server

You can configure the access server following one of the procedures described in the

following sections:

•Configuring the Access Server Using the Configuration Mode

•Configuring the Access Server Using AutoInstall

•Configuring the Access Server Manually Using the Setup Facility

Follow the procedure that best fits the needs of your network configuration.

4-6 Cisco 2500 Series Access Server User Guide

Configuring the Access Server

Note You will need to acquire the correct network addresses from your system

administrator or consult your network plan to determine correct addresses before you can

complete the access server configuration. For details on network addressing, see the

appendix “Internetworking Primer.”

Before continuing the configuration process, check the current state of the access server by

entering the show version command. The show version command will display the release

of Cisco IOS software that is available on the access server.

Configuring the Access Server Using the Configuration Mode

You can configure the access server manually if you prefer not to use the setup facility or

AutoInstall. Take the following steps to configure the access server manually:

Step 1 Connect a console terminal by following the instructions described in the section

“Connecting the Console Terminal and Modem” in the chapter “Installing the

Cisco 2500 Series Access Server” and then power up the access server.

Step 2 When you are asked if you would like to enter the initial dialog, answer no to go

into the normal operating mode of the access server:

Would you like to enter the initial dialog? [yes]: no

Step 3 After a few seconds you will see the user EXEC prompt (Router>). Type enable

to enter enable mode. Configuration changes can only be made in enable mode:

Router> enable

The prompt will change to the privileged EXEC prompt:

router#

Step 4 Enter the command config terminal at the enable prompt to enter configuration

mode from the terminal:

router# config terminal

Configuring the Cisco 2500 Series Access Server 4-7

Configuring the Access Server

You can now enter any changes to the configuration that are desired. Press Ctrl-Z

to exit configuration mode. (See the appendix “Internetworking Primer” for

configuration assistance.)

To see the currently operating configuration, enter the command show running-config at

the # prompt if you are running Cisco IOS Release 11.0 or later. Enter the command

write terminal at the # prompt if you are running a Cisco IOS release earlier than 11.0:

router# show running-config

To seethe configuration inNVRAM, enterthe commandshowstartup-configat theenable

prompt.

router# show config

To make your changes permanent, enter the command copy running-config

startup-config at the enable prompt if you are running Cisco IOS Release 11.0 or later.

Enter the command write memory if you are running a Cisco IOS release earlier than 11.0:

router# copy running-config startup-config

********

The results of the show running-config and show startup-config commands will differ if

you have made changes to the configuration, but have not yet written them to NVRAM.

The access server is now configured and will boot with the configuration you have entered.

Configuring the Access Server Using AutoInstall

The AutoInstall process is designed to configure the access server automatically after

connection to your WAN. In order for AutoInstall to work properly, a Transmission Control

Protocol/Internet Protocol(TCP/IP) hoston yournetwork mustbe preconfigured toprovide

the required configuration files. The TCP/IP host may exist anywhere on the network, as

long as the following two conditions are maintained:

1Thehost mustbe ontheremote sideofthe accessserver’ssynchronous serial connection

to the WAN.

2User Datagram Protocol (UDP) broadcasts to andfrom theaccess server andthe TCP/IP

host must be enabled.

4-8 Cisco 2500 Series Access Server User Guide

Configuring the Access Server

This functionality is coordinated by your system administrator at the site where the TCP/IP

host is located. You should not attempt to use AutoInstall unless the required files have been

provided on the TCP/IP host. See the publication Access and Communication Server

Configuration Guide for information on how AutoInstall works.

Take the following steps to prepare your access server for the AutoInstall process:

Step 1 Attach the synchronous serial cable to the access server.

Step 2 Turn on power to the access server.

The access server will load the operating system image from Flash memory. If the

remote end of the WAN connection is connected and properly configured, the

AutoInstall process will begin.

If the AutoInstall completed successfully, you may wish to write the configuration

data to the access server’s nonvolatile random-access memory (NVRAM).

Perform the following step to complete this task:

Step 3 At the # prompt, enter the copy running-config startup-config command if you

arerunning CiscoIOSRelease 11.0orlater, orthe writememorycommandif you

are running a Cisco IOS release earlier than 11.0:

Hostname# copy running-config startup-config

Taking this step will save the configuration settings that the AutoInstall process

created in the access server. If you fail to do this, your configuration will be lost

the next time you reload the access server.

Configuring the Access Server Manually Using the Setup Facility

If you do not plan to use AutoInstall, do not connect the access server’s serial (WAN) cable

to the channel service unit/data service unit (CSU/DSU). This will prevent the access server

from attempting to run the AutoInstall process. The access server will attempt to run

AutoInstall whenever you start it if the serial (WAN) connection is connected on both ends

and the access server does not have a configuration stored in NVRAM. It can take several

minutes for the access server to determine that AutoInstall is not set up to a remote TCP/IP

host.

Configuring the Cisco 2500 Series Access Server 4-9

Configuring the Access Server

Once the access server has determined that AutoInstall is not configured, it will default to

the setup facility. If the serial (WAN) cable is not connected, the access server will boot

from Flash memory and go into the setup facility.

Note You can run the setup facility any time you are at the enable prompt (#) by entering

the command setup.

Configuring the Global Parameters

When you first start the setup program you must configure the global parameters. The

global parameters are used for controlling system-wide settings. Use the following

procedure to enter the global parameters:

Step 1 Connect a console terminal by following the instructions in the section

“Connecting the Console Terminal and Modem” in the chapter “Installing the

Cisco 2500 Series Access Server” and then boot the access server to the EXEC

prompt (Router>).

Step 2 When you have booted from Flash memory, the following information will appear

after about 30 seconds. When you see this information displayed, you have

successfully booted your access server:

System Bootstrap, Version 4.14(8), SOFTWARE

2500 processor with 16384 Kbytes of main memory

Loading igs-c-l.110-0.7 at 0x3000040, size = 3865444 bytes [OK]

F3: 3779532+85880+173868 at 0x3000060

Restricted Rights Legend

Use, duplication, or disclosure by the Government is

subject to restrictions as set forth in subparagraph

Rights clause at FAR sec. 52.227-19 and subparagraph

Software clause at DFARS sec. 252.227-7013.

4-10 Cisco 2500 Series Access Server User Guide

Configuring the Access Server

cisco Systems, Inc.

170 West Tasman Drive

San Jose, California 95134-1706

Cisco Internetwork Operating System Software

IOS (tm) 3000 Software (IGS-C-L), Version 11.0(0.8), SOFTWARE

Compiled Mon 19-Jun-95 23:22 by

Image text-base: 0x030200E4, data-base: 0x00001000

cisco 2500 (68030) processor (revision C) with 16380K/2048K bytes of

memory.

Processor board ID 2685538369

X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.

Bridging software.

Authorized for Enterprise software set. (0x0)

1 Ethernet/IEEE 802.3 interface.

2 Serial network interfaces.

8 terminal lines.

32K bytes of non-volatile configuration memory.

4096K bytes of processor board System flash (Read ONLY)

Notice: NVRAM invalid, possibly due to write erase.

--- System Configuration Dialog ---

At any point you may enter a question mark '?' for help.

Refer to the 'Getting Started' Guide for additional help.

Use ctrl-c to abort configuration dialog at any prompt.

Default settings are in square brackets '[]'.

Step 3 Enter yes or press Return when you are asked if you would like to enter the

configuration dialog and if you would like to see the current interface summary.

Press Return to accept the default (yes):

Would you like to enter the initial configuration dialog? [yes]:

First, would you like to see the current interface summary? [yes]:

Any interface listed with OK? value "NO" does not have a valid

configuration

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