Network4em: September 2012

USING IOS CONTENT SENSITIVE HELP

Using IOS content sensitive help (?)

The "?" provides context sensitive help, it provides the command syntax or the commands supported in the various lOS modes.

Example 1:

Router>?

Exec commands:

<1-99> Session number to resume

Connect Open a terminal connection

Disable Turn off privileged commands

Disconnect Disconnect an existing network connection

Enable Turn on privileged commands

exit Exit from the EXEC

logout Exit from the EXEC

ping Send echo messages

resume Resume an active network connection

show Show running system information

ssh Open a secure shell client connection

telnet Open a telnet connection

terminal Set terminal line parameters

traceroute Trace route to destination

--- More ---

Example 2:

Router(config)#interface ?

Ethernet IEEE 802.3

FastEthernet FastEthernet IEEE 802.3

GigabitEthernet GigabitEthernet IEEE 802.3z

Loopback Loopback interface

Multilink Multilink-group interface

Null Null interface

Serial Serial

Tunnel Tunnel interface

Vlan Catalyst Vlans

Range Interface range command

Similarly the context sensitive help can be used in all IOS modes and Commands.

Command Line editing:

· Tab -> for command completion

· Ctrl + a -> to beginning of the command

· Ctrl + e -> to end of the command

· Esc + b -> back by one word

· Esc + f -> forward by one word

Wrong Command notification:

Router#comfigure termainal

% Invalid input detected at '^' marker.

Router#

Note: Command line error occur primarily from typing mistakes

SHOW COMMANDS OUTPUT VERFICATION

SHOW COMMANDS OUTPUT VERFICATION

Delhi#show running-config

Building configuration...

Current configuration: !

version 12.0

no service password-encryption

hostname Delhi

no logging console

enable secret 5 $l$IQzR$veVuUBtwlXP2T0pUUTuvC0

enable password cisco

memory-size iomem 15

ip subnet-zero

no ip domain-lookup

Interface Ethernet0/0

Ip address 10.0.0.1 255.0.0.0

Interface Serial0/0

No ip address

Shutdown

Interface Serial0/1

No ip address

Shutdown

ip classless

line con 0

password zoom

login

line auxO

password zoom

login

line vty0 4

password zoom

login

end

Router#show flash

System flash directory:

File Length Name/status

1 3498453 c2600-i-mz_120-9.bin

[3420536 bytes used, 4968072 available, 8388608 total]

8192K bytes of processor board System flash (Read/Write)

Router#show Version

Cisco IOS Software, 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Compiled Wed 18-Jul-07 04:52 by pt_team

ROM: System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)

System returned to ROM by power-on

System image file is "flash:c1841-advipservicesk9-mz.124-15.T1.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco 1841 (revision 5.0) with 114688K/16384K bytes of memory.

Processor board ID FTX0947Z18E

M860 processor: part number 0, mask 49

2 FastEthernet/IEEE 802.3 interface(s)

2 Serial(sync/async) network interface(s)

191K bytes of NVRAM.

63488K bytes of ATA Compact Flash (Read/Write)

Configuration register is 0x2102

VARIOUS MODES ON ROUTER

VARIOUS MODES ON ROUTER

To configure Cisco Router lOS commands are used. There are different lOS modes for various configurations.

The lOS modes are:

1. User Mode:

Router>

Router is the default hostname and can be changed, '>' Symbol implies "User Mode".

This is the first mode user interface with the IOS. It is a restricted mode and support

only a very few basic commands.

2. Privilege Mode:

Router#

‘#’ symbol implies Privilege Mode". This mode has full administrative rights. This

mode is generally used for advance troubleshooting using 'shov/ and 'debug'

command. This is also called as the EXEC mode.

3. Global Configuration Mode

Router(config)#

'(config)#' symbol implies "Global Configuration Mode". Configuration of the Router

starts from this mode. In this mode configurations that affect the complete router

are given. Example, hostname of the router.

4. Interface Configuration Mode

Router(config-if)#

‘(config-if)#' symbol implies "Interface Configuration Mode". This mode is used to

configure a specific interface.

The different types of interfaces are:-

1. LAN interface

a. Ethernet

b. Fastethernet

c. Gigabiteethernet

2. WAN Interface

a. Serial

Each interface.is identified by a number. The first interface is numbered as 0 the

second interface is numbered as 1 and so on. In a modular router the number is given

as 'module number/interface number'. Example 0/0.

5. Line Configuration Mode

Router(config-line)#

'(config-line)#’ symbol implies "Line Configuration Mode". This mode is used to

Configure Telnet, Console and Auxiliary.

6. Router Mode

Router(config-router)#

'(config-router)#' symbol implies "Router Mode". This mode is used to advertise

network under dynamic routing protocols.

INITIAL CONFIGURATION

INITIAL CONFIGURATION

A brand new router does not have any configurations. Initial configuration has to be done first. As part of initial configuration the following configurations needs to be done!

1. Hostname

2. IP Address to Ethernet interface

3. Passwords

a. Console

b. Auxiliary

c. VTY (Telnet)

d. Enable

4. Save the configuration

Initial Configuration – Example

Router >

Router > enable

Router #

Router #show running-config

Router # show startup-config

Router # show flash

Router # show version

Router # configure terminal or conf t

Router(config)#

Router # hostname Delhi

Delhi(config) #interface ethernat 0

Delhi(config-if) #

Delhi(config-if) #ip address 192.168.1.1 255.255.255.0

Delhi(config-if) #no shutdown

Delhi(config-if) #exit

Delhi(config) #line vty 0 4

Delhi(config-line) #

Delhi(config-line) #password THN

Delhi(config-line) #login

Delhi(config-line) #exit

Delhi(config) #line con 0

Delhi(config-line) #password CCNA

Delhi(config-line) #login

Delhi(config-line) #exit

Delhi(config) #line aux 0

Delhi(config-line) #password CCNA

Delhi(config-line) #login

Delhi(config-line) #exit

Delhi(config) #enable password cisco

Delhi(config) # enable secret thn

Delhi(config) #exit

Verify the Configuration

Delhi #show running-config

Delhi #show startup-config

Commands to save the configuration:

Delhi #copy running-config startup-config

(OR)

Delhi #write memory

(OR)

Delhi #wr

Verify the Startup Configuration

Delhi #show running-config

CONFIGURATION OF HYPER TERMINAL

Configure Hyper-Terminal

Steps to configure Hyper Terminal

Click Start -> Programs -> Accessories -> Communication -> Hyper Terminal

HyperTerminal will open a dialog box, give a name (user defined) and click “ok”

Select the "COM" port to which the console cable is connected and click "ok"

Click on “Restore Defaults” and click “OK”

Default values are:-

Bits per second: 9600

Data Bits: 8

Parity: None

Stop Bits: 1

Flow Control: None

Once Hyper Terminal is ready, now switch on Router.

After the Router boots-up completely, (on a new Cisco Router) it displays the following question:

------System Configration Dialog------

Would you like to enter the initial configuration dialog? [Yes|No]: No

Would you like to terminate autoinstall? [Yes]:

If you choose “yes” IOS will prompt Questions to gather the information to configure the Router, it is recommended to choose “no”, since we can configure the Router using IOS commands.

CONNECTIVITY FOR INITIAL CONFIGURATION

Connectivity for Initial configuration

Connect the console cable from the Console port of the Router to the COM port of the PC and setup the Hyper-terminal.

ICONS FOR NETWORK DEVICES.

CONNECTIVITY LINK SYMBOLS