Cisco 2501 - Router - EN User manual

CHAPTER
Configuring the Cisco 2500 Series Access Server 4-1
Configuring the Cisco 2500
Series Access Server
4
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: [phone]
•Fax: [phone]
•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
Copyright (c) 1986-1995 by cisco Systems
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
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
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
Copyright (c) 1986-1995 by cisco Systems, Inc.
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
SuperLAT software copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software (copyright 1994 by TGV Inc).
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