Cisco Commands List Part 1

Setting the router commands

Show version – shows router version

 Enable – enter privilege EXEC configuration mode.

Configure terminal – enter global configuration mode

Config t – enter config mode

Hostname – name the device

Enable secret – set password

Router – tells the router which protocol to use (e.g. router  RIP – router configuration command )

Network – tells the router which directly networks he connected to.

Line Vty 0 4 – configure/enable telnet session

Password – set password for telnet session

Login console 0 – configure/enable console session

Password –set password for console login

Copy run start – save router configuration


Setting router IP address


Interface Ethernet 0 – setting the Ethernet 0 port setting (if more them one port use 0/0, or 0/1)

IP address – setting ip address

No shutdown – enable the connection / port

   ****available ports Interface Ethernet 0, Interface Ethernet 1, Interface serial 0

ip host NAME – map host mane to ip address


Verify and save configuration


Show run – verify router configuration

Copy run start -Save router configuration

Copy running –config  startup-config – save config

copy running-config tftp – save config file to TFTP server.


Change settings



No-  To change information, go to the proper command mode and retype the command with the newinformation. To remove an old command, go to the proper command mode and retype thecommand exactly as it was entered with the word no in front of it. For



Gadsden(config-if)#description Connection to the host

Gadsden(config-if)#no description Connection to the host



Configure ACL


Show access-list – show list

Access list number permit network subnet – create basic access control list (access list 1 permit

No access-list <number> – remove access list

Access list deny any – deny access

Interface serial 1 – assign to connection

Ip access-group 5 in – ACL direction

End – end ACL process


Show Commands


show running-config command. This command will display the current configuration

Show ? – Show all Show commands

Showedit  ip route table

Show ip route – show ip table route

No network – remove network from route list




show cdp neighbors – Show surround devices in the LAN.

# cdp run

# cdp enable

# clear cdp counters

# show cdp

# show cdp entry {*|device-name[*][protocol | version]}

# show cdp interface [type number]

# show cdp neighbors [type number] [detail]



Other command


service password-encryption – This command is used to encrypt passwords in configuration output:

Erase startup-config – Erasing and reloading the router

reload – restart roter

Router rip – router configuration mode

Sh run – show router configuration

Sh start – show NVRAM config

End – move one level up in the menu

Description – add description to interface

banner motd # message here #– display message of the day

ip host NAME – map host mane to ip address



 Set Password example:


Router(config)#line console 0
Router(config-line)#password <password>


Router(config)#line vty 0 4
Router(config-line)#password <password>


Configure interface

Router(config)#interface serial 0/0
Router(config-if)#clock rate 56000
Router(config-if)#no shutdown



Show Commands

Router#show interfaces serial 0/1

show controllers serial – Displays information-specific to the interface hardware

show clock – Shows the time set in the router

show hosts – Displays a cached list of host names and addresses

show users – Displays all users who are connected to the router

show history – Displays a history of commands that have been entered

show flash – Displays information about flash memory and what IOS files are stored there

show version – Displays information about the router and the IOS that is running in RAM

show ARP – Displays the ARP table of the router

show protocol – Displays the global and interface specific status of any configured Layer 3 protocols

show startup-configuration – Displays the saved configuration located in NVRAM

show running-configuration – Displays the configuration currently running in RAM


Telnet Commands:

telnet host name – connect to others routers using telnet (E.g. telnet paris)

Denver>connect paris
Denver>telnet paris



Static routes:


ip route 130 – set static route to other routers.

Ip route – ip route to one host.


* ip route destination network sub mask gateway


Use the following steps to configure static routes:

Determine all desired destination networks, their subnet masks, and their gateways. A gateway can be either a local interface or a next hop address that leads to the desired destination.

Enter global configuration mode.

Type the ip route command with a destination address and subnet mask followed by their corresponding gateway from Step one. Including an administrative distance is optional.

Repeat Step three for as many destination networks as were defined in Step one.

Exit global configuration mode.

Save the active configuration to NVRAM by using the copy running-config startup-config command.

Use the following steps to configure default routes:

Enter global configuration mode.

Type the ip route command with for the destination network address and for the subnet mask. The gateway for the default route can be either the local router interface that connects to the outside networks or the IP address of the next-hop router. In most cases, it is preferred that the IP address of the next hop router is specified.

Exit global configuration mode.

Save the active configuration to NVRAM by using the copy running-config startup-config command.


To remove route type:

no ip route