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Chapter 11 - Configuring
and Testing Your Network
.
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Overview
Define the role of the Internetwork Operating System(IOS)
Use Cisco CLI commands to perform basic routerand switch configuration and verification
Given a network addressing scheme, select, apply,
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and verify appropriate addressing parameters to ahost
Use common utilities to verify network connectivitybetween hosts
Use common utilities to establish a relativeperformance baseline for the network
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Role of Internetwork Operating System (IOS)
Identify several classes of devices that have IOSembedded
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Role of Internetwork Operating System (IOS)
Basic routing and switching functions Reliable and secure access to networked resources
Network scalability Using Cisco Command Line Interface (CLI) to configuration
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Access Methods
Access MethodsConsole
Telnet or SSHAUX port
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Access Methods
Use the CLI to access various IOS configurationmodes on a device
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Console
ConsoleLow speed serial connection to directly connect a
computer or terminal to the console port on the router orswitch.
Provides out-of-band access to a router
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Examples of console use are:The initial configuration of the network device
Disaster recovery procedures and troubleshooting
where remote access is not possible
Password recovery procedures
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Telnet and SSH
Telnet
Require active networking services on the device.Run on layer 7 in OSI model
Secure Shell (SSH) protocol
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Like telnet but more secure accessStronger password
Uses encryption when transporting session data
Use can use ssh client on PC name: Puttyhttp://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
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AUX
Another way to establish a CLI session remotely is via atelephone dialup connection using a modemconnected to the router's AUX port
Can used locally, like console port Console port is also preferred over the auxiliary port for
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debugging, and error messages by default.
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Role of Internetwork Operating System (IOS)
Define the purpose of startup config.
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Role of Internetwork Operating System (IOS)
Identify the relationship between IOS and config
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Configuration files
Contain the Cisco IOS software commands used tocustomize the functionality of a Cisco device.
Commands are parsed (translated and executed) by theCisco IOS software when the system is booted (from thestartup-config file) or when commands are entered in theCLI while in confi uration mode.
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Types of Configuration Files
The running configuration fileUsed during the current operation of the device
Changes to the running configuration will immediatelyaffect the operation of the Cisco device
The startup configuration file
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se as e ac up con gura on an s oa e w enthe device is started
The startup configuration file or startup-config file isstored in non-volatile RAM (NVRAM)
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Role of Internetwork Operating System (IOS)
Recognize that Cisco IOS is modal and describe theimplications of modes.
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Role of Internetwork Operating System (IOS)
Define the different modes and identify the modeprompts in the CLI
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Role of Internetwork Operating System (IOS)
Identify the basic command structure for IOScommands
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IOS command Conventions
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Role of Internetwork Operating System (IOS)
Identify the types of help and feedback available whileusing IOS and use these features to get help, take
shortcuts and ascertain success
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The Forms of Help
The IOS has several forms of help available:Context-sensitive help
Command Syntax CheckHot Keys and Shortcuts
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Command Syntax Check
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Command Syntax Check
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Hot Keys and Shortcuts
Tab - Completes the remainder of the command orkeyword
Ctrl-R - Redisplays a line Ctrl-Z - Exits configuration mode and returns to the EXEC Down Arrow - Allows user to scroll forward through former
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Up Arrow - Allows user to scroll backward through formercommands
Ctrl-Shift-6 - Allows the user to interrupt an IOS process
such as ping or traceroute Ctrl-C - Aborts the current command and exits the
configuration mode
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Examination Commands
Identify the purpose of the show command and severalof its variations
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IOS Configuration mode
Identify several of the configuration modes, theirpurpose and their associated prompt
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IOS Configuration mode
Interface mode - to configure one of the networkinterfaces (Fa0/0, S0/0/0,..)
Line mode - to configure one of the lines (physical orvirtual) (console, AUX, VTY,..)
Router mode - to configure the parameters for one of the
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BASIC CONFIGURATION
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Naming a Device
Explain the reasons for naming devices.
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Naming a Device
Describe two common approaches to establishingnaming conventions
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Naming a Device
To remove the name of a device, use:AtlantaHQ(config)# no hostname
Router(config)#
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Naming a Device
Some guidelines for naming conventions are that namesshould:
Start with a letter
Not contain a space
End with a letter or digit
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ave c arac ers o on y e ers, g s, an as es
Be 63 characters or fewer
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Set Password
The passwords introduced here are:Console password - limits device access using the
console connection
Enable password - limits access to the privilegedEXEC mode
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- ,
the privileged EXEC modeVTY password - limits device access using Telnet
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Set Password
Describe the role of passwords in limiting access todevice configurations
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Set Password
Describe several ways in which access to a deviceconfiguration can be limited
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Set Banner
Use the CLI to set passwords and add banners to adevice
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Set Banner
Here are some examples of information to include in abanner:
"Use of the device is specifically for authorizedpersonnel."
"Activity may be monitored."
"
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.
Command:Router(config)#banner motd # Secured system#
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Manage configuration file
Trace the steps used to examine the startup config,make changes to config, and replace the startup configwith the running config
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M fi i fil
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Manage configuration file
Use basic IOS config commands to manage a device.
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B k C fi ti TFTP S
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Backup Configuration on TFTP Server
Backup Configuration on TFTP Server1. Enter the copy running-config tftp command.
2. Enter the IP address of the host where the configurationfile will be stored.
3. Enter the name to assign to the configuration file.
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. nswer yes o con rm eac c o ce.
R i All C fi ti
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Removing All Configurations
Removing All ConfigurationsRouter# erase startup-config
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U t t fil t b k d t fi tti
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Use a text file to backup and restore config settings
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Use a text file to backup and restore config settings
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When using HyperTerminal, follow these steps:1. On the Transfer menu, click Capture Text.
2. Choose the location.3. Click Start to begin capturing text.
4. Once capture has been started, execute the show
Use a text file to backup and restore config settings
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runn ng-con g or s ow s ar up-con g comman a e
privileged EXEC prompt. Text displayed in the terminalwindow will be placed into the chosen file.
5. View the output to verify that it was not corrupted.
Backup Configurations with Text Capture (TeraTerm)
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Backup Configurations with Text Capture (TeraTerm)
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Backup Configurations with Text Capture (TeraTerm)
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1. On the File menu, click Log.2. Choose the location. TeraTerm will begin capturing text.3. Once capture has been started, execute the show
runnin -confi or show startu -confi command at the
Backup Configurations with Text Capture (TeraTerm)
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privileged EXEC prompt. Text displayed in the terminalwindow will be placed into the chosen file.
4. When the capture is complete, select Close in theTeraTerm: Log window.
5. View the output to verify that it was not corrupted.
Restoring Text Configurations
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Restoring Text Configurations
When using HyperTerminal, the steps are:
1. Locate the file to be copied into the device and open the textdocument.
2. Copy all of the text.
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When using TeraTerm, the steps are:
1. On the File menu, click Send file.
2. Locate the file to be copied into the device and click Open.
3. TeraTerm will paste the file into the device.
Configure Router Interfaces
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Configure Router Interfaces
Identify the role of a router in a network.
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Configure Router Interface
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Configure Router Interface
Describe the purpose of having multiple interfaces inone router
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Configure Router Interface
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Configure Router Interface
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Configure Interface Description
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Configure Interface Description
Explain the purpose of assigning interface descriptionsto a router
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Select, Apply, and Verify Appropriate AddressingParameters to a Host
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Parameters to a Host
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Select, Apply, and Verify Appropriate AddressingParameters to a Host
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Given a type of host and a master addressing scheme,trace the steps for assigning host parameters to a host
Parameters to a Host
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Select, Apply, and Verify Appropriate AddressingParameters to a Host
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Trace the steps for using ipconfig/ifconfig to verify hostparameter assignments and for using ping to test
assignments
Parameters to a Host
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Select, Apply, and Verify Appropriate AddressingParameters to a Host
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Parameters to a Host
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Use Common Utilities to Verify Network ConnectivityBetween Hosts
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Between Hosts
Use the ping command in the CLI to determine if theIP protocol is operational on a local host
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Use Common Utilities to Verify Network ConnectivityBetween Hosts
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Use the ping command to determine if the IP protocolis properly bound to an NIC
Between Hosts
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Use Common Utilities to Verify Network ConnectivityBetween Hosts
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Use the ping command to determine if a host canactively communicate across the local network
Between Hosts
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Use Common Utilities to Verify Network ConnectivityBetween Hosts
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Use the ping command to verify that the local host cancommunicate across the internetwork to a given
remote host.
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Use Common Utilities to Verify Network ConnectivityBetween Hosts
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Identify several conditions that might cause thetest to fail
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Use Common Utilities to Establish a RelativePerformance Baseline for the Network
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Use the output of the ping command, saved into logs,and repeated over time, to establish relative network
performance
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Use Common Utilities to Establish a RelativePerformance Baseline for the Network
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Use the output of the traceroute command, saved intologs, and repeated over time, to establish relative
network performance
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Use Common Utilities to Establish a RelativePerformance Baseline for the Network
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Trace the steps for verifying the physicaladdresses of the hosts
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How to know about PC connect to SW
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Labs
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Summary
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Commands (EXTRA)
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Set banner (recall)Router(config)#banner motd # message #
Logging SynchronizeRouter(config)#line console 0
Router(config-line)#logging synchronous
Removing auto domain name resolveRouter(config)# no ip domain lookup
Write commandRouter#write - The same as copy run start
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