Cisco CLI

Question 1

What is the running-config ?

Answer 1

The current active configuration file on the device. As you enter commands into the CLI, you edit the active configuration

Question 2

What is the start-up config ?

Answer 2

The configuration loaded upon the restart of the device

Question 3

How to enter priviledged EXEC mode ?

Answer 3

type “enable” in CLI

Router#

Question 4

How to enter global configuration mode ?

Answer 4

type “configure terminal” in CLI

Router(config)#

Question 5

How to create a password on Cisco device ?

Answer 5

type “enable password ____” in CLI while in configuration mode

or

type “enable secret ____” in CLI while in configuration mode
(more secure and takes precedence over enable password)

Question 6

How to display running and starting configuration ?

Answer 6

type “show ____-config” in EXEC mode.
show running-config
show startup-config

Question 7

How to save configuration ?

Answer 7

Type into CLI
1 “write”
2 “write memory”
3 “copy running-config startup-config”

Question 8

How to encrypt passwords ?

Answer 8

service password-encryption
(Encrypts current and future passwords. Uses Cisco proprietary type 7 encryption. Not secure can be cracked)

enable secret _____
(more secure. Uses MD5 encryption, harder to crack. Passwords are always encrypted)

Question 9

How to remove a command ?

Answer 9

type “no” in front of command you want to remove (global config mode)

Question 10

You use the […] keyword to execute privileged EXEC commands in global configuration mode.

Answer 10

do

Question 11

How to change hostname of Cisco device ?

Answer 11

Use the ‘hostname’ command in global configuration mode

Question 12

How to view mac address table ?

Answer 12

show mac address-table

Question 13

How to clear mac address table ?

Answer 13

clear mac address-table dynamic

clear mac address-table dynamic interface (mac or port)

Question 14

How to view interface info on router ?

Answer 14

show ip interface breif

Question 15

How to configure interface on router ?

Answer 15

interface (interface)

Question 16

How to manually set ip address for interface ?

Answer 16

ip address (IP address) (subnet mask)

no shutdown

Question 17

How to configure interfaces in a range ?

Answer 17

interface range (range)

Question 18

How to configure router static path to next hop ?

Answer 18

ip route (ip address) (netmask) (next hop ip address)

ip route (ip address) (netmask) (exit interface)

Question 19

Cisco Default Serial Connection Setting

Answer 19

Speed (baud): 9600
Data bits: 8
Stop Bits: 1
Parity: None
Flow Control: None

Question 20

When logging into Cisco CLI what is the default user mode ?

Answer 20

‘User EXEC mode’
Users can look at some information but can’t make any changes to the configuration

Question 21

How can you view all the availible commands in your current user mode ?

Answer 21

type ‘?’ in the CLI

Question 22

VTY

Answer 22

The term “vty” stands for Virtual teletype. VTY is a virtual port and used to get Telnet or SSH access to the device. VTY is solely used for inbound connections to the device. These connections are all virtual with no hardware associated with them.

in global config mode type
line vty 0 16
login local
logging sync
username <user> password <pass></pass></user>

Question 23

How to setup remote access

Answer 23

Enter global configuration mode:
configure terminal (conf t)

Create user account:
username <user> password <pass></pass></user>

Create VLAN:
interface vlan1

Set its IP address:
ip address <IP> <subnet></subnet></IP>

Virtual ports are administratively down by default so turn interface on:
no shutdown

line vty 0 15

tell where to look for username and password:
login local

verify telnet access:
transport input all

set domain name:
ip domain-name <name></name>

generate cryptography key:
crypto key generate rsa

Enter modulus number based on security policy

ip ssh version 2

Set to ssh only:
transport input ssh

Question 24

show ip interface brief

Answer 24

show all interfaces

Question 25

show all interfaces in a VLAN

Answer 25

show vlan brief

Question 26

show inventory

Answer 26

used to display information about the hardware components installed in the device. This command provides details such as the part numbers, serial numbers, descriptions, and quantities of the various hardware components.