CCNA Command Summary
Command Reference:
1.
Configure hostname and password
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Router> enable
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Router# configure terminal
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Router (config)# hostname Openlab
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Openlab (config)# enable secret ccna
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Openlab (config)# service password-encryption
2.
Configure IP address in a interface
•
Router> enable
•
Router# configure terminal
•
Router(config)# interface serial 0
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Router(config-if)# ip address 192.168.1.1 255.255.255.0
•
Router(config-if)# no shutdown
3.
Configure Telnet in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# enable secret openlab
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Router (config)# line vty 0 4
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Router (config-line)# password openlab
•
Router (config-line)# login
4.
Configure Static route in a router
•
Router> enable
•
Router# configure terminal
• Router
(config)# ip route 192.168.1.0 255.255.255.0 172.16.1.1
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Router (config)# ip route 0.0.0.0 0.0.0.0 172.16.1.1
5.
Configure RIP in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# router rip
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Router (config-router)# version 2
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Router (config-router)# network 10.0.0.0
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Router (config-router)# network 172.16.0.0
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Router (config-router)# network 192.168.1.0
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Router (config-router)# no auto-summary
6.
Configure EIGRP 100 in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# router eigrp 100
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Router (config-router)# network 10.0.0.0
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Router (config-router)# network 172.16.0.0
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Router (config-router)# network 192.168.1.0
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Router (config-router)# no auto-summary
7.
Configure OSPF area 0 in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# router ospf 1
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Router (config-router)# network 10.0.0.0 0.255.255.255 area 0
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Router (config-router)# network 172.16.0.0 0.0.255.255 area 0
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Router (config-router)# network 192.168.1.0 0.0.0.255 area 0
8.
Configure VTP in a switch
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Switch> enable
•
Switch# vlan database
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Switch (config-vlan)# vtp server / client / transparent
•
Switch (config-vlan)# vtp domain openlab
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Switch (config-vlan)# vtp pruning enable
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Switch (config-vlan)# exit
9.
Configure Trunk Interface in a switch
•
Switch> enable
•
Switch# configure terminal
•
Switch (config)# interface fa0/24
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Switch (config-if)# switchport trunk encapsulation dot1q
•
Switch (config-if)# switchport mode trunk
10.
Configure VLAN in a switch
•
Switch> enable
•
Switch# vlan database
•
Switch (config-vlan)# vlan 10 name HR
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Switch (config-vlan)# vlan 20 name Sales
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Switch (config-vlan)# exit
•
•
11.
Configure Access Interface in a switch
•
Switch> enable
•
Switch# configure terminal
•
Switch (config)# interface range fa0/1 - 23
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Switch (config-if)# switchport mode access
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Switch (config-if)# switchport access vlan 10
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Switch (config-if)# spanning-tree portfast
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Switch (config-if)# spanning-tree bpduguard enable
12.
Configure Standard access-list in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# access-list 1 permit 192.168.1.0 0.0.0.255
•
Router (config)# access-list 1 permit host 172.16.1.1
•
Router (config)# interface Ethernet 0
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Router (config-if)# ip access-group 1 in / out
13.
Configure Extended access-list in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# access-list 100 permit ip 192.168.1.0 0.0.0.255 172.16.1.0 0.0.0.0.255
•
Router (config)# access-list 100 permit tcp host 192.168.1.1 host 172.16.1.1 eq www
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Router (config)# interface Ethernet 0
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Router (config-if)# ip access-group 100 in / out
14.
Configure PPP & CHAP in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# hostname Left
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Left (config)# username Right password openlab
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Left (config)# interface serial 0
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Left (config-if)# encapsulation ppp
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Left (config-if)# ip address 192.168.1.1 255.255.255.0
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Left (config-if)# ppp authentication chap
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Left (config-if)# no shutdown
•
•
Router> enable
•
Router# configure terminal
•
Router (config)# hostname Right
•
Right (config)# username Left password openlab
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Right (config)# interface serial 0
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Right (config-if)# encapsulation ppp
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Right (config-if)# ip address 192.168.1.2 255.255.255.0
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Right (config-if)# ppp authentication chap
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Right (config-if)# no shutdown
15.
Configure Frame-relay in a router, Local DLCI=102
•
Router> enable
•
Router# configure terminal
•
Router (config)# interface serial 0
•
Router (config-if)# encapsulation frame-relay
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Router (config-if)# ip address 192.168.1.1 255.255.255.0
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Router (config-if)# no frame-relay inverse-arp
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Router (config-if)# frame-relay lmi-type ansi
•
Router (config-if)# frame-relay map ip 192.168.1.2 102
•
Router (config-if)# no shutdown
16.
Configure DDR in a router
•
Router> enable
•
Router# configure terminal
•
Router (config)# hostname Left
•
Left (config)# username Right password openlab
•
Left (config)# interface bri 0
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Left (config-if)# encapsulation ppp
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Left (config-if)# isdn switch-type basic-net5
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Left (config-if)# ip address 192.168.1.1 255.255.255.0
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Left (config-if)# dialer map ip 192.168.1.2 name Right br 123
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Left (config-if)# dialer-group 1
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Left (config-if)# ppp authentication chap
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Left (config-if)# no shutdown
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Left (config)# access-list 20 permit 172.16.0.0 0.0.255.255
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Left (config)# dial-list 1 ip protocol list 20
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Router> enable
•
Router# configure terminal
•
Router (config)# hostname Right
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Right (config)# username Right password openlab
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Right (config)# interface bri 0
•
Right (config-if)# encapsulation ppp
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Right (config-if)# isdn switch-type basic-net5
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Right (config-if)# ip address 192.168.1.2 255.255.255.0
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Right (config-if)# dialer map ip 192.168.1.1 name Right br 321
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Right (config-if)# dialer-group 1
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Right (config-if)# ppp authentication chap
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Right (config-if)# no shutdown
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Right (config)# access-list 20 permit 10.0.0.0 0.0.0.255
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Right (config)# dial-list 1 ip protocol list 20
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