Starting a Router

© 2002, Cisco Systems, Inc. All rights reserved.
© 2002, Cisco Systems, Inc. All rights reserved.
2
Starting a Router
Objectives
Upon completing this lesson, you will be able to:
Start a router and recognize the normal boot sequence
Use the command-line interface to interact with the Cisco IOS software, given an operational router
Use the online help facilities associated with the command-line interfaces, given an operational router
System startup routines initiate router software
Router falls back to startup alternatives if needed
Initial Startup of the Cisco Router
Unconfigured Versus Configured Router
Bootup Output from the Router
Router#setup


--- System Configuration Dialog ---

Continue with configuration dialog? [yes/no]: yes

At any point you may enter a question mark `?` for help.
Use ctrl-c to abort configuration dialog at any prompt.
Default settings are in square brackets `[]`.


Basic management setup configures only enough connectivity
for management of the system, extended setup will ask you
to configure each interface on the system

Would you like to enter basic management setup? [yes/no]: no
Setup: The Initial
Configuration Dialog
Setup Interface Summary
First, would you like to see the current interface summary? [yes]:

Interface IP-Address OK? Method Status Protocol

BRI0 unassigned YES unset administratively down down

BRI0:1 unassigned YES unset administratively down down

BRI0:2 unassigned YES unset administratively down down

Ethernet0 unassigned YES unset administratively down down

Serial0 unassigned YES unset administratively down down
Interfaces Found During Startup
Setup Initial
Global Parameters

Configuring global parameters:

Enter host name [Router]:wg_ro_c

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: cisco

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: sanfran

The virtual terminal password is used to protect
access to the router over a network interface.
Enter virtual terminal password: sanjose
Configure SNMP Network Management? [no]:
Setup Initial
Protocol Configurations
Configure LAT? [yes]: no
Configure AppleTalk? [no]:
Configure DECnet? [no]:
Configure IP? [yes]:
Configure IGRP routing? [yes]: no
Configure RIP routing? [no]:
Configure CLNS? [no]:
Configure IPX? [no]:
Configure Vines? [no]:
Configure XNS? [no]:
Configure Apollo? [no]:
Setup Interface
Parameters
BRI interface needs isdn switch-type to be configured
Valid switch types are :
[0] none..........Only if you don`t want to configure BRI.
[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/Canada
[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]:

Configuring interface parameters:

Do you want to configure BRI0 (BRI d-channel) interface? [no]:

Do you want to configure Ethernet0 interface? [no]: yes
Configure IP on this interface? [no]: yes
IP address for this interface: 10.1.1.33
Subnet mask for this interface [255.0.0.0] : 255.255.255.0
Class A network is 10.0.0.0, 24 subnet bits; mask is /24

Do you want to configure Serial0 interface? [no]:
Setup Script
Review and Use
The following configuration command script was created:

hostname Router
enable secret 5 $1$/CCk$4r7zDwDNeqkxFO.kJxC3G0
enable password sanfran
line vty 0 4
password sanjose
no snmp-server
!
no appletalk routing
no decnet routing
ip routing
no clns routing
no ipx routing
no vines routing
no xns routing
no apollo routing
isdn switch-type basic-5ess
interface BRI0
shutdown
no ip address
!
interface Ethernet0
no shutdown
ip address 10.1.1.31 255.255.255.0
no mop enabled
!
interface Serial0
shutdown
no ip address

end

[0] Go to the IOS command prompt without saving this config.
[1] Return back to the setup without saving this config.
[2] Save this configuration to nvram and exit.

Enter your selection [2]:
Logging In to the Router
You can abbreviate a command to the fewest characters that make a unique character string.
Router User-Mode
Command List
wg_ro_c>?
Exec commands:
access-enable Create a temporary Access-List entry
atmsig Execute Atm Signalling Commands
cd Change current device
clear Reset functions
connect Open a terminal connection
dir List files on given device
disable Turn off privileged commands
disconnect Disconnect an existing network connection
enable Turn on privileged commands
exit Exit from the EXEC
help Description of the interactive help system
lat Open a lat connection
lock Lock the terminal
login Log in as a particular user
logout Exit from the EXEC
-- More --

wg_ro_c#?
Exec commands:
access-enable Create a temporary Access-List entry
access-profile Apply user-profile to interface
access-template Create a temporary Access-List entry
bfe For manual emergency modes setting
cd Change current directory
clear Reset functions
clock Manage the system clock
configure Enter configuration mode
connect Open a terminal connection
copy Copy from one file to another
debug Debugging functions (see also `undebug`)
delete Delete a file
dir List files on a filesystem
disable Turn off privileged commands
disconnect Disconnect an existing network connection
enable Turn on privileged commands
erase Erase a filesystem
exit Exit from the EXEC
help Description of the interactive help system
-- More --
You can complete a command string by entering the unique character string, then pressing the Tab key.
Router Privileged-Mode
Command List
Context-Sensitive Help
Console Error Messages
Identifies problems with router commands that are incorrectly entered so you can alter or correct them
Allows recall of long or complex commands or entries for reentry, review, or correction
Command History Buffer
Provides a list of commands and the arguments associated
with a specific command
Router Command-Line Help Facilities
Router Context-Sensitive Help
Router#
clok

Translating "CLOK"
% Unknown command or computer name, or unable to find computer address



Router#
cl?

clear clock

Router#
clock

% Incomplete command.

Router#
clock ?
set Set the time and date
Router#
clock set
% Incomplete command.

Router#
clock set ?
hh:mm:ss Current Time

Symbolic Translation
Command Prompting
Last Command Recall
Router Context-Sensitive Help (cont.)
Router# clok
Translating "CLOK"
% Unknown command or computer name, or unable to find computer address



Router#
clear clock

Router#
% Incomplete command.

Router#
set Set the time and date
Router#
% Incomplete command.

Router#
hh:mm:ss Current Time


Router#
clock set 19:56:00

% Incomplete command.


Router#
clock set 19:56:00 ?

<1-31> Day of the month

MONTH Month of the year



Router#
clock set 19:56:00 04 8

^

% Invalid input detected at the `^` marker


Router#
clock set 19:56:00 04 August
% Incomplete command.


Router#
clock set 19:56:00 04 August ?
<1993-2035> Year
Command
Prompting
Syntax Checking
Command
Prompting
Router>Shape the future of internetworking by creating unpreced
Shape the future of internetworking by creating unprecedented value for customers, employees, and partners.
Enhanced Editing Commands








(Automatic scrolling of long lines.)







Ctrl-A

Move to the beginning of the command line.







Ctrl-E

Move to the end of the command line.







Esc-B

Move back one word.







Esc-F

Move forward one word.







Ctrl-B

Move back one character.







Ctrl-F

Move forward one character.
Ctrl-D
Delete a single character.

Router>$ value for customers, employees, and partners.
Enhanced Editing Commands (cont.)
Ctrl-P or Up Arrow
Recalls last (previous) commands
Ctrl-N or Down Arrow
Recalls more recent commands
show history
Shows command buffer contents
history size line
Sets the buffer size permanently
Router Command History
terminal history size lines
Sets session command buffer size
show version Command
wg_ro_a#show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-JS-L), Version 12.0(3), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Mon 08-Feb-99 18:18 by phanguye
Image text-base: 0x03050C84, data-base: 0x00001000

ROM: System Bootstrap, Version 11.0(10c), SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASE SOFTWARE(fc1)

wg_ro_a uptime is 20 minutes
System restarted by reload
System image file is "flash:c2500-js-l_120-3.bin"
(output omitted)
--More--

Configuration register is 0x2102


Viewing the Configuration
show running-config and
show startup-config Commands
wg_ro_c#show startup-config
Using 1359 out of 32762 bytes
!
version 12.0
!
-- More --
wg_ro_c#show running-config
Building configuration...

Current configuration:
!
version 12.0
!
-- More --
In NVRAM
In RAM
Displays the current and saved configuration
Summary
The startup of a Cisco router requires that you verify the physical installation, power up the router, and view the Cisco IOS software output on the console.
The router startup sequence is similar to the startup sequence of the Catalyst switch. The router first performs POST, then it finds and loads the IOS image. Finally, it finds and loads the device configuration file.
Use the enable command to access the privileged EXEC mode from the user EXEC mode.
Summary (Cont.)
The Cisco router uses Cisco IOS software with extensive command-line input help facilities, including context-sensitive help.
The Cisco IOS CLI includes an enhanced editing mode that provides a set of editing key functions.
The Cisco router CLI provides a history or record of commands you have entered. This feature, called the command history, is particularly useful to help you recall long or complex commands or entries.
After logging in to a Cisco router, you can verify the router initial startup status using the router status commands: show version, show running-configuration, and show startup-configuration.