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CCNA Commands

Pearson_IT
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Terms in this set (29)

Enable
Global Configuration Mode
configure terminal
enters global configuration mode from privileged EXEC mode
hostname R1
Change the Hostname
enable password
Unencrypted password used to limit access to privileged EXEC mode from IOS user EXEC mode.
show running-config
Lists the currently used configuration
service password-encryption
Global command that (weakly) encrypts passwords defined by the username password, enable password, and login commands.
no service password-encryption
removes encryption of passwords
(must be in global config mode)
enable secret
Encrypted password used to limit access to privileged EXEC mode from IOS user EXEC mode.
copy running-config startup-config
copies saved config in running config (RAM) to NVRAM or "write memory" for IOS under ver.11
reload
Save the configuration and reload the router
line console 0
accesses console line 0 configuration mode (also; vty & aux lines)
line console password ccna login
Change the password of the console
show cdp neighbors
see directly connected Cisco devices
show ip interface brief
Lists a single line of information about each interface, including the IP address, line and protocol status, and the method with which the address was configured (manual or DHCP).
interface serial 0
Specifies the serial interface and enters interface configuration mode.
no shutdown
a command used when interface is administratively down
show controllers serial 0
displays information about physical interface
details what kind of cable is used (DTE or DCE)
(must be in global config mode)
clock rate 64000
a common measurement of CPU speed; tells how fast the CPU can
process data; the higher the clock rate, the faster the CPU
ip address
Change the IP Address
ping
a DOS command that tests connectivity and isolates hardware problems and any mismatched configurations
switchport mode access
permanent nontrunking mode with negotiation to convert the link to a nontrunk link
switchport access vlan 1
Interface subcommand that statically configures the interface into that one VLAN
switchport mode trunk
Puts the interface into permanent trunking mode and negotiates to convert the neighboring link into a trunk link. The interface becomes a trunk interface even if the neighboring interface is not a trunk interface.
switchport trunk encapsulation dot1q
Specify the trunking encapsulation to be used, if doing trunking
interface g0/0.3
One of the virtual interfaces on a single physical interface.
show interface g0/0.3
Shows you the setup for the interface that you are trying to look up
encapsulation dot1q vlan-id
A subinterface subcommand that tells the router to use 802.1Q trunking, for a particular VLAN, and with the native keyword, to not encapsulate in a trunking header
show vlan brief
on switch - show what VLANs exist, names, ports assigned
show interfaces trunk
Lists information about the currently operational trunks (or just for the trunk listed in the command) and the VLANs supported on those trunks.
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