you can easily understand concepts by reading illustrated examples.
For any doubts in these example contact :
pawar121@gmail..com - withing 24 hour your query will be solved .
All these command are practised in a software CISCO PACKET TRACER .
COMMAND LINE INTERFACE
· To enter the hyper terminal
Programs à Accessories à Communication àHyperTerminal
(HyperTerminal window opens)
-prompts for the screen name (not the router name)
-connect to window à select com1 à ok
-com1 properties window à select restore default à ok
· Switch ON the router (if new router that is not configured it will ask -----
Would u like to enter initial configuration dialog[yes/no]: no
Press return to get started (enter)
Router>
* User Mode/User Executable Mode
Router> enable (enter)
Router#
* Privileged Mode/Enable Mode – Executable Mode.
The following commands can be executed in this mode
Router#show running-config(enter)
Router#debug xxx
Router#copy xxx
Router#configure terminal(enter)
Router(config)#
* Global Configuration Mode - Any configuration change in this mode affects the whole router.
Router(config)#interface e 0/fastethernet 0/ S0 / S 1(enter)
Router(config-if)#
* Specific Configuration Mode – configuration changes to specific part of the router like lines and interfaces.
· Setting User mode Password
Router(config)#Line console 0(enter)
Router(config-line)#password xxxx
Router(config-line)#login
· To set username & password for the user mode
Router(config)#username xxxx password xxxx
Router(config)#Line console 0
Router(config-line)#login local
· To change the hostname
Router(config)#hostname HOR(enter)
HOR(config)#
· T o encrypt all the passwords
Router(config)#service password-encryption
· To set password for the privileged mode
Router(config)#enable password/secret xxxx
QUESTIONS
1 . What are the different modes in a router?
- Router> ------------- User mode or the user executable mode
Enable (enter)
- Router# ---------- Privileged mode/Enable mode
Show running-config
Debug xxx
Ping A.B.C.D
- Router# configure terminal (enter)
Router(config)# ----------- Global configuration mode
- Router(config)#interface ethernet 0/fastethernet 0/serial 0/ serial 1(enter)
- Router(config)# line console 0
Router(config-if/line)# ---------- Specific configuration mode
2 . Difference between Login and Login Local?
- Login activates the usermode entry password for a single user without username.
- Login local activates the username and password for the same usermode, incase of multiple users.
3 . How to encrypt our passwords?
- Router(config)#service password-encryption – Encrypts all the passwords at a time. The passwords once encrypted, cannot be decrypted by any command.
4 . How to set password to the user mode?
- Router(config)#Line console 0(enter)
Router(config-line)#password xxxx
Router(config-line)#login - Login activates the usermode entry password for a single user without username.
5 . How to set password to the privilege mode?
- Router(config)#enable password/secret xxxx
6 . How to set username and password to the user mode?
- Router(config)#username xxxx password xxxx
- Router(config-line)#login local - Login local activates the username and password for the same usermode, incase of multiple users.
