Cisco 2524 - Router - EN Manual de usuario

CHAPTER

Configuring the Cisco 2524 and Cisco 2525 Routers 4-1

ConﬁguringtheCisco2524and

Cisco 2525 Routers

This chapter describes how to conﬁgure the Cisco 2524 and Cisco 2525 routers and

contains the following sections:

•Booting the Router for the First Time

•Conﬁguring the Router

•Specifying the Boot Method

•Checking the Conﬁguration Settings

•Getting More Information

This chapter provides just enough information to get the router up and running. For

Cisco IOS Release 11.0 and earlier releases, refer to the Router Products Conﬁguration

Guide for additional conﬁguration information. For Cisco IOS Release 11.1 and later

releases, refer to the Conﬁguration Fundamentals Conﬁguration Guide.

Booting the Router for the First Time

Each time you power on the router, it goes through the following boot sequence:

1The router goes through power-on self-test diagnostics to verify basic operation of the

CPU, memory, and interfaces.

2Thesystembootstrapsoftware(bootimage)executesandsearchesforavalidCisco IOS

image (router operating system software). The source of the Cisco IOS image (Flash

memory or a Trivial File Transfer Protocol [TFTP] server) is determined by the

conﬁguration register setting. The factory-default setting for the conﬁguration register

is 0x2102, which indicates that the router should attempt to load a Cisco IOS image

from Flash memory.

4-2 Cisco 2524 and Cisco 2525 Router User Guide

Configuring the Router

3If after ﬁve attempts a valid Cisco IOS image is not found in Flash memory, the router

reverts to boot ROM mode (which is used to install or upgrade a Cisco IOS image).

4If a valid Cisco IOS image is found, then the router searches for a valid conﬁguration

ﬁle.

5If a valid conﬁguration ﬁle is not found in NVRAM, the router runs the System

Conﬁguration Dialog so you can conﬁgure it manually. For normal router operation,

there must be a valid Cisco IOS image in Flash memory and a conﬁguration ﬁle in

NVRAM.

The ﬁrst time you boot your router, you will need to conﬁgure the router interfaces and then

save the conﬁguration to a ﬁle in NVRAM. Proceed to the next section, “Conﬁguring the

Router,” for conﬁguration instructions.

Conﬁguring the Router

You can conﬁgure the router using one of the following procedures:

•Conﬁguration mode—Recommended if you are familiar with Cisco IOS commands.

•AutoInstall—Recommended for automatic installation if another router running

Cisco IOS software is installed on the network. This conﬁguration method must be set

up by someone with experience using Cisco IOS software.

•System Conﬁguration Dialog—Recommended if you are not familiar with Cisco IOS

commands.

Use the procedure that best ﬁts the needs of your network conﬁguration and level of

Cisco IOS experience.

Timesaver Acquire the correct network addresses from your system administrator or

consult your network plan to determine correct addresses before you begin to conﬁgure the

router.

Configuring the Cisco 2524 and Cisco 2525 Routers 4-3

Configuring the Router

Using Conﬁguration Mode

You can conﬁgure the router manually if you prefer not to use AutoInstall or the System

Conﬁguration Dialog. Take the following steps to conﬁgure the router manually:

Step 1 Connect a console terminal following the instructions in the section “Connecting

the Console Terminal and Modem” in the chapter “Installing the Cisco 2524 and

Cisco 2525 Routers,” and then power ON the router.

Step 2 When you are prompted to enter the initial dialog, enter no to go into the normal

operating mode of the router:

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

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

enable command to enter enable mode. You can only make conﬁguration changes

in enable mode.

Router> enable

The prompt changes to the privileged EXEC (enable) prompt:

Router#

Step 4 Enter the conﬁgure terminal command at the enable prompt to enter

conﬁguration mode:

Router# configure terminal

You can now enter any changes you want to the conﬁguration.

Step 5 Press Ctrl-Z to exit conﬁguration mode.

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

enable prompt:

Router# show running-config

ToseetheconﬁgurationinNVRAM,entertheshowstartup-conﬁgcommandattheenable

prompt:

Router# show startup-config

4-4 Cisco 2524 and Cisco 2525 Router User Guide

Configuring the Router

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

different if you have made changes to the conﬁguration but have not yet written them to

NVRAM.

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

command at the enable prompt:

Router# copy running-config startup-config

********

The router is now conﬁgured and will boot with the conﬁguration you entered.

Using AutoInstall

The AutoInstall process is designed to conﬁgure the router automatically after connection

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

Protocol/InternetProtocol(TCP/IP)hostonyournetworkmustbepreconﬁguredtoprovide

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

long as the following two conditions are maintained:

1The host must be on the remote side of the router’s synchronous serial connection to the

WAN.

2User Datagram Protocol (UDP) broadcasts to and from the router and the TCP/IP host

must be enabled.

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

hostis located. You should not attempt to use AutoInstallunless the required ﬁles havebeen

provided on the TCP/IP host. For Cisco IOS Release 11.0 and earlier releases, refer to the

publication Router Products Conﬁguration Guide for additional information. For

Cisco IOS Release 11.1 and later releases, refer to the publication Conﬁguration

Fundamentals Conﬁguration Guide.

Note AutoInstall works on synchronous serial connections only. The 2-wire

switched 56-kbpsDSU/CSUmoduleoperatesonswitched56-kbpscircuitsonly;therefore,

you cannot use it for AutoInstall.

Configuring the Cisco 2524 and Cisco 2525 Routers 4-5

Configuring the Router

Take the following steps to prepare your router for the AutoInstall process:

Step 1 Attach the WAN cable to the router.

Step 2 Turn ON power to the router.

The router 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 AutoInstall successfully completes, you can write the conﬁguration data to the

router’s NVRAM. Perform the following step to complete this task.

Step 3 Enter the copy running-conﬁg startup-conﬁg command:

Router# copy running-config startup-config

Taking this step saves the conﬁguration settings that the AutoInstall process

created in the router. If you do not do this, your conﬁguration will be lost the next

time you reload the router.

Using the System Conﬁguration Dialog

If you do not plan to use AutoInstall, make sure all the WAN cables are disconnected from

the router. This will prevent the router from attempting to the run the AutoInstall process.

The router will attempt to run AutoInstall whenever you power it on if there is a WAN

connection on both ends and the router does not have a conﬁguration ﬁle stored in

NVRAM. It can take several minutes for the router to determine that AutoInstall is not set

up to a remote TCP/IP host.

If your router does not have a conﬁguration (setup) ﬁle and you are not using AutoInstall,

the router will automatically start the setup command facility. An interactive dialog called

the System Conﬁguration Dialog appears on the console screen. This dialog helps you

navigate through the conﬁguration process by prompting you for the conﬁguration

information necessary for the router to operate.

Many prompts in the System Conﬁguration Dialog include default answers, which are

included in square brackets following the question. To accept a default answer, press

Return; otherwise, enter your response.

This section gives an example conﬁguration using the System Conﬁguration Dialog. When

you are conﬁguring your router, respond as appropriate for your network.

4-6 Cisco 2524 and Cisco 2525 Router User Guide

Configuring the Router

At any time during the System Conﬁguration Dialog, you can request help by typing a

question mark (?) at a prompt.

Before proceeding with the System Conﬁguration Dialog, obtain from your system

administrator the node addresses and the number of bits in the subnet ﬁeld (if applicable)

of the Ethernet and synchronous serial ports. For more information about Internet Protocol

(IP) addresses and subnets, refer to the publication Internetworking Technology Overview.

(See the section “Getting More Information” at the end of this chapter.)

Take the following steps to conﬁgure the router using the System Conﬁguration Dialog:

Step 1 Connect a console terminal to the console connector on the rear panel of your

router, and turn ON power to the router. (For more information, refer to the section

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

Cisco 2524 and Cisco 2525 Routers.”)

Note The default parameters for the console port are 9600 baud, 8 data bits, no parity, and

2 stop bits.

Step 2 After about 30 seconds, information similar to the following is displayed on the

console screen.

Note The messages displayed vary, depending on the Cisco IOS release and feature set

you selected. The screen displays in this section are for reference only and may not exactly

reﬂect the screen displays on your console.

When you see this information, you have successfully booted your router:

System Bootstrap, Version X.X(XXXX) [XXXXX XX], RELEASE SOFTWARE

2500 processor with 4096 Kbytes of main memory

Notice: NVRAM invalid, possibly due to write erase.

F3: 5797928+162396+258800 at 0x3000060

Configuring the Cisco 2524 and Cisco 2525 Routers 4-7

Configuring the Router

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.

Cisco Systems, Inc.

170 West Tasman Drive

San Jose, California 95134-1706

Cisco Internetwork Operating System Software

IOS (tm) X000 Software (IGS-J-L), Version XX.X(XXXX) [XXXXX XXX]

Compiled Fri 20-Oct-95 16:02 by XXXXX

Image text-base: 0x03030FC0, data-base: 0x00001000

Cisco 252X (68030) processor (revision A) with 4092K/2048K bytes of

memory.

Processor board ID 00000000

Bridging software.

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

Basic Rate ISDN software, Version X.X.

1 Ethernet/IEEE 802.3 interface.

2 Serial network interfaces.

1 ISDN Basic Rate interface.

32K bytes of non-volatile configuration memory.

8192K 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 '[]'.

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

Step 3 Press Return or enter yes to begin the conﬁguration process.

4-8 Cisco 2524 and Cisco 2525 Router User Guide

Configuring the Router

Step 4 When the System Conﬁguration Dialog asks whether you want to view the current

interface summary, press Return or enter 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

Interface IP-Address OK? Method Status Protocol

Ethernet0 unassigned NO not set up down

BRI0 unassigned NO not set up up

Serial0 unassigned NO not set down down

Serial1 unassigned NO not set down down

Step 5 Conﬁgure the global parameters. Choose which protocols to support on the

Ethernet interface. For IP installations, you can press Return to accept the default

values (in brackets) for most of the questions. A typical conﬁguration follows:

Configuring global parameters:

Enter host name [Router]:

Next, you are prompted to enter an enable secret password. There are two types of

privileged-level passwords:

•Enable secret password (a very secure, encrypted password)

•Enable password (a less secure, nonencrypted password)

The enable password is used when the enable secret password does not exist.

For maximum security, be sure the passwords are different. If you enter the same

password for both, the router will accept your entry, but will display a warning

message indicating that you should enter a different password.

Step 6 Enter an enable secret password:

The enable secret is a one-way cryptographic secret used

instead of the enable password when it exists.

Enter enable secret: pail

The enable password is used when there is no enable secret

and when using older software and some boot images.

Configuring the Cisco 2524 and Cisco 2525 Routers 4-9

Configuring the Router

Step 7 Enter the enable and virtual terminal passwords:

Enter enable password: shovel

Enter virtual terminal password: vterm1

Step 8 Press Return to accept Simple Network Management Protocol (SNMP)

management, or enter no to refuse it:

Configure SNMP Network Management? [yes]: no

Step 9 In the following example, the router is conﬁgured for AppleTalk, IP, and IPX.

Conﬁgure the appropriate protocols for your router:

Configure Vines? [no]:

Configure LAT? [no]:

Configure AppleTalk? [no]: yes

Multizone networks? [no]: yes

Configure DECnet? [no]:

Configure IP? [yes]:

Configure IGRP routing? [yes]:

Your IGRP autonomous system number [1]: 15

Configure CLNS? [no]:

Configure bridging? [no]:

Configure IPX? [no]: yes

Configure XNS? [no]:

Configure Apollo? [no]:

Step 10 Enter the ISDN BRI switch type for the router. The ISDN switch type appropriate

fortherouter depends on the ISDN provider’s equipment. Table 4-1liststheISDN

switch types.

Enter ISDN BRI Switch Type [none]: basic-5ess

4-10 Cisco 2524 and Cisco 2525 Router User Guide

Configuring the Router

Table 4-1 ISDN Switch Types

Conﬁguring the ISDN BRI Interface

This section explains how to conﬁgure the ISDN BRI interface. If an ISDN BRI WAN

module is not installed in your router, skip this section and proceed with the next section,

“Conﬁguring the Ethernet or Token Ring Interfaces.”

Country ISDN Switch Type Description

Australia basic-ts013 Australian TS013 switches

Europe basic-1tr6 German 1TR6 ISDN switches

basic-nwnet3 Norwegian NET3 ISDN switches (phase 1)

basic-net3 NET3 ISDN switches (UK and others)

vn2 French VN2 ISDN switches

vn3 French VN3 ISDN switches

Japan ntt Japanese NTT ISDN switches

North America basic-5ess AT&T basic rate switches

basic-dms100 NT DMS-100 basic rate switches

basic-ni1 National ISDN-1 switches

New Zealand basic-nznet3 New Zealand NET3 switches

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