Power On Self Test

Found in NVRAM

Not found

provides CLI with very few available commands by default

Does not allow the configuration to be viewed or changed

allows viewing and changing of configuration

Command

provides basic system configuration details

provides software version

names and sources of config files

config-register settings

boot images

set from global config mode

allows user to name device to ease ID

displays line up/down status & protocol status

stats for each interface

IP addresses

gives information about next possible command

<cr> means no more options left

sets a discription for an interface

must be in interface config mode (Router (config-if)#)

similar to hostname, but for interfaces

used to administratively close an interface

pipe command or Output modifier

allows user to erase files

save files to other location

used to verify layers 1 & 2 of each interface

displays information about physical interface

details what kind of cable is plugged into serial interface

sets an IP address for an interface

use secondary to add another IP address to the same interface

shows layer 3 details of an interface

show ip interface brief

line console [port]

login

exec timeout [minutes] [seconds]

logging synchronous

used to log in to device using modem

line aux [port]

login

from global config mode

similar to telnet, more secure

more complicated setup

service password-encryption

encrypts passwords in show running-config

secret password automatically encrypted

used to show information to all users when logging on to the router

type from global config mode

banner exec ?

shows a banner everytime an exec process is activated

banner incoming ?

used to show banner when connected to reverse terminals

banner login ?

shows banner after motd banner but before login

must use no login banner to deactivate