Ccna Commands

CCNA Commands __________________________________________________________ __________________________________________________________ ______________ Router> enable MODE , USER MODE ] (limited)

[ ENABLE used for show commands

Router# configure terminal used for show commands (total)

[ PRIVILAGE MODE ]

Router(config)# [ GLOBAL CONFIGURATION MODE ] used for configuration Router(config-if)# MODE ] Router(config-line)# Router(config-router)#

[ INTERFACE [ LINE MODE ] [ ROUTER MODE ]

------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# hostname R-1 configures hostname of device Router(config)# enable password xxxxx is asked before privilage mode Router(config)# enable secret xxxxx

password

password is asked before privilage mode [ prefered ] ------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# line concole 0 Router(config-line)# password xxxxx password for console port

sets

Router(config-line)# login -------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# line vty 0 4 Router(config-line)# password xxxxx password for telnet lines 0 to 4

sets

Router(config-line)# login Router(config-line)# transport input ssh secure telnet (passwords will be encripted)

allows

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# interface fa0/0 selects port fa0/0 Router(config)# ip address 192.168.1.1 255.255.255.0 give it ip address Router(config)# no shutdown opens the port

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# ip route destination

mask

next-hop-ip-address Router(config)# ip route 172.16.0.0 EXAMPLES

255.255.0.0

1.1.1.1

Router(config)# ip route STATIC ROUTE Router(config)# ip route 172.16.0.0

255.255.0.0

fa0/1

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# ip route 0.0.0.0 DEFAULT ROUTE

0.0.0.0

fa0/1

Router(config)# ip route 0.0.0.0 EXAMPLES

0.0.0.0

180.50.2.1

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------DYNAMIC ROUTING --------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# Router rip enables protocol rip Router(config-router)# version 2 enables version 2 of rip

Router(config-router)# no autosummary autosummarization

disables

Router(config-router)# network 10.0.0.0 subnets of 10.0.0.0 or 10.0.0.0 network

advartises all

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# Router eigrp 100 enables protocol eigrp with AS no: 100 Router(config-router)# no autosummary autosummarization Router(config-router)# network 10.0.0.0 all subnets of 10.0.0.0 or 10.0.0.0 network

disables advartises

Router(config-router)# network 172.16.1.0 0.0.0.255 advartises subnet 172.16.1.0 /24 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# Router ospf 1 enables protocol ospf with process no: 1 Router(config-router)# network 10.0.0.0 0.255.255.255 area 0 puts all subnets of 10.0.0.0 or 10.0.0.0 network in area 0 Router(config-router)# network 172.16.1.0 0.0.0.255 area 1 puts subnet 172.16.1.0 /24 in area 1 -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

ROUTE REDISTRIBUTION ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------Router(config)# Router rip Router(config-router)# redistribute eigrp 100 metric Router(config-router)# redistribute ospf 1 1 Router(config-router)# redistribute protocol

1

metric metric

hop-count --------------------------------------------------------------------------------------------------------------Router(config)# Router ospf 1 Router(config-router)# redistribute 5 subnets

eigrp 100

Router(config-router)# redistribute metric 5 subnets

rip

metric

Router(config-router)# redistribute protocol metric cost subnets ---------------------------------------------------------------------------------------------------------------Router(config)# Router eigrp 100

Router(config-router)# redistribute 1 2 3 4 5

ospf 1

Router(config-router)# redistribute 1 2 3 4 5

rip

metric metric

Router(config-router)# redistribute protocol metric BW

DELAY Reliability load mtu ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ACCESS CONTROL LIST ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------STANDARD ACL Router(config)# access-list 1 permit host 10.1.1.1 Router(config)# access-list 1 deny host 10.1.1.2 Router(config)# access-list 1 permit any ---------------------------------------------------------------------------------------------------------------------------------------EXTENDARD ACL Router(config)# access-list 101 10.1.1.1 host 172.16.1.1

IP

Router(config)# access-list 101 TCP 10.1.1.1 host 172.16.1.2 eq FTP

permit permit

host host

Router(config)# access-list 101 10.1.1.1 192.168.1.0 0.0.0.255

IP

permit

Router(config)# access-list 101 10.1.1.1 any

IP

deny

Router(config)# access-list 101 any

IP

permit

host host any

----------------------------------------------------------------------------------------------------------------------------------------------------------------------SWITCHING ----------------------------------------------------------------------------------------------------------------------------------------------------------------------Switch > enable MODE , USER MODE ] (limited) Switch # config terminal ] (total)

[ ENABLE used for show commands [ PRIVILAGE MODE used for show commands

Switch(config) # [ GLOBAL CONFIGURATION MODE ] used for configuration Switch(config-vlan) # ]

[ VLAN MODE

-----------------------------Switch(config)# vlan 10 Switch(config)# name sales

creates vlan 10 give it name sales

--------------------------------------------------------------------------------------------------------------------------------------------------------------------Switch(config)# interface fa 0/9 Switch(config-if)# switchport mode access port configuration

Access

Switch(config-if)# switchport access vlan 10 acessport in vlan 10

puts

-------------------------------------------------------------------------------------------------------------------------------------------------------------------Switch(config)# interface fa 0/10 Switch(config-if)# switchport mode trunk configuration

Trunk port

Switch(config-if)# switchport trunk encapsulation dot1q selects trunking protocol 802.1q Switch(config-if)# switchport nonegotiate off DTP negotiation for trunk

turns

--------------------------------------------------------------------------------------------------------------------------------------------------------------------Inter Vlan Routing ( router-on-stick) Router(config)# interface fa 0/0 Router(config-if)# no shutdown port (must be put always on physical port) Router(config-if)# interface fa 0/0.1 interface fa0/0.1

opens the creates sub

Router(config-sub-if)# encapsulation dot1q 10 sub int fa0/0.1 to vlan 10

links

Router(configsub-if)# ip address 10.0.0.1 255.0.0.0 gives ip address to port fa0/0.1 --------------------------------------------------------------------------------------------------------------------------------------------------------------------Switch(config)# spanning-tree vlan 10 root primary automatic ] Switch(config)# spanning-tree vlan 10 priority 4096 manual ]

[ [

--------------------------------------------------------------------------------------------------------------------------------------------------------------------Switch(config)# interface range fa0/1 - 3,fa0/9,fa0/15 selects a group of port Switch(config-range-if)#channel-group 1 mode on binds the port in one group no : 1 , called ether channel HSRP Router(config)# interface fa 0/0.1 Router(config-sub-if)# encapsulation dot1q 10 Router(configsub-if)# ip address 10.0.0.1 255.0.0.0 Router(configsub-if)# standby 1 ip 10.0.0.3 defines the ip of virtual-gateway Router(configsub-if)# standby 1 priority 150 sets the priority of this port to 150 ,default is 100,so it becomes

active Router(configsub-if)# standby 1 preempt needed to force this port to become active gateway again after failure ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------SHOW COMMANDS OR EXEC COMMANDS Router# show version Router# show flash Router# show clock Router# show cdp neighbors Router# show cdp entries Router# show running-config -------------------------------------------------------------------Switch# show version Switch# show flash Switch# show clock Switch# show cdp neighbors Switch# show cdp entries Switch# show running-config ----------------------------------------------------------------------

Router# show ip interface brief Router# show interface fastethernet 0/0 Router# show ip protocols Router# show ip route Router# show ip route connected Router# show ip route static Router# show ip route rip Router# show ip route ospf Router# show ip route eigrp Router# show access-list Router# show standby ---------------------------------------------------------------------Switch# show vlan brief Switch# show interfaces trunk Switch# show interface fa0/0 switchport Switch# show spanning-tree vlan 10 Switch# show ether-channel Switch# show ether-channel summary ------------------------------------------------------------------------------------------------------------------------------------------------------------------TROUBLE SHOOTING COMMAND

From Router or Layer3 switch Router# ping 192.168.1.1 Router# traceroute 192.168.1.1 From command prompt PC> ping 192.168.1.1 PC> tracert 192.168.1.1 For remote access from command prompt PC> telnet 192.168.1.1 telnet PC> password xxxx of remote router R-7>enable router password xxxx password / enable secret

ip of router you want to password of line vty loged in that enable

R-7#

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