Icnd1 Commands

Front 1

Set name for Cisco device

Back 1

(config) #hostname

Front 2

Context-sensitive help for all commands available

Back 2

Question mark (?)

Front 3

List all first parameter options for command

Back 3

?

Front 4

Lists commands that start with com

Back 4

com?

Front 5

List all parameters beginning with parameter typed so far

Back 5

command parm?

Front 6

Complete command typed so far

Back 6

[TAB]

Front 7

Lists all parameters with a brief explanation

Back 7

command parameter ?

Front 8

2 keyboard shortcuts that show the previous command

Back 8

1) up arrow

2) Ctrl+P

Front 9

2 keyboard shortcuts that move forward through previous commands

Back 9

1) down arrow

2) Ctrl+N

Front 10

2 keyboard shortcuts that moves cursor backward along command

Back 10

1) left arrow

2) Ctrl+B

Front 11

2 keyboard shortcuts that moves cursor foward along command

Back 11

1) right arrow

2) Ctrl+F

Front 12

Keyboard shortcut that moves the cursor backward along command, deleting characters

Back 12

Backspace

Front 13

Turn on logging of ARP details

Back 13

#debug arp

Front 14

Display information about directly connected Cisco devices

Back 14

#show cdp neighbors

Front 15

Display list of physical ethernet addresses that have been discovered on a switch or router

Back 15

>show mac address-table

Front 16

Administratively disable an interface

Back 16

(config-if) #shutdown

Front 17

Keyboard shortcut to drop back to enable mode from any other sub-mode

Back 17

Ctrl-Z

Front 18

Reboot a Cisco network device

Back 18

#reload

Front 19

Erase all VLAN data from device

Back 19

#delete flash:vlan.dat

Front 20

Set domain name

Back 20

(config) #ip domain-name <name>

Front 21

Set console password

(2 commands)

Back 21

(config-line) #password <password>

(config-line) #login

Front 22

Set Level 7 encryption on all device passwords

Back 22

(config) #service password-encryption

Front 23

Append commands to a new line; switch information will not be interrupted.

Back 23

(config-line) #logging synchronous

Front 24

Turn off Domain Name System (DNS) queries so that spelling mistakes do not slow you down.

Back 24

(config) #no ip domain-lookup

Front 25

Create a private key for use with ssh

Back 25

(config) #crypto key generate rsa

Front 26

Move to a mode where you can edit ports 1-12 all at once

Back 26

(config) #interface range fa0/1-12

Front 27

Delete all dynamically-learned ethernet addresses from a switch's CAM table

Back 27

#clear mac address-table dynamic

OR

#clear mac-address-table dynamic

Front 28

Show all directly connected Cisco devices

Back 28

#show cdp neighbors

Front 29

Configure Cisco device for ssh access

(three commands)

Back 29

(config)#ip domain-name

(config)#crypto key generate rsa

(config)#username secret >

Hint 29

check sequence of commands for dependency, also check accuracy of username command

Front 30

Disable timeout for console connection

Back 30

(config-line)#no exec-timeout

Front 31

Use local user database for virtual terminal login information

Back 31

(config-line)#login local

Front 32

Set virtual terminal sessions to idle for 60 minutes before closing connection

Back 32

(config-line)#exec-timeout 60

Front 33

Set virtual terminal to allow both telnet and ssh

Back 33

(config-line)#transport input telnet ssh

Front 34

Set interface to full duplex at 100 Mbps

(two commands)

Back 34

(config-if)#duplex full

(config-if)#speed 100

Front 35

Configure switchport to permit two MAC addresses

Back 35

(config-if)#switchport port-security maximum 2

Front 36

Configure switchport to permit only the first learned MAC address(es) on a port

Back 36

(config-if)#switchport port-security mac-address sticky

Front 37

Display brief information only about FastEthernet port 1 on a switch

Back 37

#show run interface fastEthernet 0/1

Front 38

Display port security information about FastEthernet port 1 on a switch

Back 38

#show port-security interface fastEthernet 0/1

Front 39

Enable port security on a switch interface

Back 39

(config-if)#switchport port-security

Front 40

Display detailed information only about FastEthernet port 1 on a switch

Back 40

#show interfaces fastEthernet 0/1

Front 41

Enable DTP on a switchport

Back 41

(config-if)#switchport mode dynamic

Front 42

Hard-code a switchport as with 802.1Q

(two commands)

Back 42

(config-if)#switchport trunk encapsulation dot1q

(config-if)#switchport mode trunk

Hint 42

check sequence of these commands to make sure they aren't dependent

Front 43

Turn off DTP on switchport

Back 43

(config-if)#switchport nonegotiate

Front 44

Set trunk port to receive frames without 802.1Q tags on VLAN 5

Back 44

(config-if)#switchport trunk native vlan 5

Front 45

Display information about VTP on switch

Back 45

#show vtp status

Front 46

Disable VTP on switch

Back 46

(config)#vtp mode transparent

Front 47

Set VTP domain name

Back 47

(config)#vtp domain <name>

Front 48

Set VTP to run version 2

Back 48

(config)#vtp version 2

Front 49

Display VLAN information on a switch

Back 49

#show vlan

Front 50

Create VLAN 2 and name it ACCT

(two commands)

Back 50

(config)#vlan 2

(config-vlan)#name ACCT

Front 51

Put multiple switchports in VLAN 2

(2 commands)

Back 51

(config-if-range)#switchport mode access

(config-if-range)#switchport access vlan 2

Front 52

Display detailed VLAN information for fa0/2

Back 52

#show interfaces fa0/2 switchport

Front 53

2 ways of resetting Cisco device to factory default configuration

(two commands)

Back 53

#write erase

#erase startup-config

Front 54

Display verbose VLAN information for fastEthernet port 5

Back 54

#show interfaces fastEthernet 0/5 switchport

Front 55

Configure trunk port to only permit VLANs 2 & 3

Back 55

(config-if)#switchport trunk allowed vlan 2-3

Front 56

Erase statistics on FastEthernet port 1

Back 56

#clear counters fastEthernet 0/1

Hint 56

check that this command doesn't need interface

Front 57

Display list and information about IP addresses and routes on a router

Back 57

#show ip route

Front 58

Create a default route where 192.168.0.1 is the IP of the forwarding router.

Back 58

(config)#ip route 0.0.0.0 0.0.0.0 192.168.0.1

Front 59

Allow subnets with all zeros

Back 59

(config)#ip subnet-zero

Front 60

In ROMMON, tell IOS to boot while ignoring NVRAM

Back 60

rommon>confreg 0x2142

Front 61

In ROMMON, tell devices to powercycle

Back 61

rommon > reset

Front 62

Re-enable NVRAM on reboot

Back 62

(config)#config-register 0x2102

Front 63

"Impersonate" an ISP and set the speed

Back 63

(config)#clock rate <#####>

Front 64

Log user off
(2 ways of doing it)

Back 64

>exit

OR

#logout

Front 65

Enter startup mode

Back 65

#setup

Front 66

Disable keyboard shortcuts

Back 66

#terminal no editing

Front 67

Set command-line output to display the default number of lines

Back 67

#terminal length 24

Front 68

Set number of commands in the buffer to the maximum size

Back 68

#terminal history size 256

Front 69

Display information about Cisco IOS software

Back 69

#show version

Front 70

List all commands in the history buffer

Back 70

#show history

Front 71

Display information about flash memory

Back 71

#show flash

Front 72

Leave privileged mode

Back 72

#disable

Front 73

Display information about the Ethernet controller

Back 73

#show controllers

Front 74

Display current configuration in DRAM

Back 74

#show running-config

Front 75

Display current configuration in NVRAM

Back 75

#show startup-config

Front 76

Determine whether the switch passed POST

Back 76

#show post

Front 77

Move to global configuration mode

Back 77

#configure terminal

Front 78

Set enable password to cisco

Back 78

(config)#enable password cisco

Front 79

Set encrypted password to class

Back 79

(config)#enable secret class

Front 80

Assign management IP to default VLAN

(two commands)

Back 80

(config)#interface vlan1

(config-if)#ip address 192.168.0.1 255.255.255.0

Front 81

Set default gateway on switch

Back 81

(config)#ip default-gateway 192.168.0.1

Front 82

Require user to login to console before use

Back 82

(config-line)# login

Front 83

Prevent console line from logging out when the connection is idle

Back 83

(config-line)# exec-timeout 0 0

Front 84

Create EIGRP routing for autonomous system 10

Back 84

(config)# router eigrp 10

Front 85

Advertise directly connected networks (classful address only)

Back 85

(config-router)# network A.B.C.D

Front 86

Disable automatic summarization

Back 86

(config-router)# no auto-summary

Front 87

Create virtual subinterface on router

Back 87

(config-if)# interface fastethernet 0/0.1

Hint 87

Double check mode on this flash card

Front 88

Assign trunking protocol to subinterface, VLAN 1 - the native vlan

Back 88

(config-subif)# encapsulation dot1q 1 native

Front 89

Set switch to VTP Server mode for VLANS

Back 89

(config)# vtp mode server

Front 90

Enable IP routing on switch

Back 90

(config)# ip routing

Front 91

Create a Layer 3 port on a switch

Back 91

(config-if)# no switchport

Front 92

Change switch to VTP client mode

Back 92

(config)# vtp mode client

Front 93

Display output including fields:

OK? ...and... Method

Back 93

# show ip interface brief

Front 94

View usability status of IP interfaces

Back 94

# show ip interface

Front 95

Configure protected ports (private VLAN edge ports) on a Cisco Catalyst 2950 switch

Back 95

(config-if)# switchport protected

Front 96

Menu-based prompt for testing ICMP connections

Back 96

> ping ....OR...

# ping

Front 97

Prevent DHCP allocation of the IP 10.1.0.253

Back 97

(config)# ip dhcp excluded-address 10.1.0.253

Front 98

View information about the DHCP address pool

Back 98

# show ip dhcp pool

Front 99

Disable CDP on a single interface

Back 99

(config-if)# no cdp enable

Front 100

Disable CDP on an entire router

Back 100

(config)# no cdp run

Front 101

Configure port security to shut down port if more than one physical address is detected

(2 commands)

Back 101

(config-if)# switchport port-security maximum 1

(config-if)# switchport port-security violation shutdown

Front 102

Discover routes a packet takes to destination address

Back 102

> traceroute

Hint 102

Equivalent of tracert used in Windows OS

Front 103

Disable sending routing updates on a router interface

Back 103

(config-router)# passive-interface

Hint 103

Prevents RIP routes

Front 104

Configure a router to use DNS for hostname resolution

Back 104

(config)# ip domain lookup

Front 105

Define static hostname-to-address mappings on router

Back 105

(config)# ip host

Hint 105

If hostname cache does not exist yet, it is automatically created

Front 106

Display information about the interfaces on which CDP is enabled

Back 106

# show cdp interface

Front 107

Enables a router to forward packets destined for a subnet with no default route to best supernet possible

Back 107

(config)# ip classless

Front 108

Restrict incoming and outgoing connections between a particular VTY

Back 108

(config-line)# access-class