command to set the configuration register value
command to get current configuration value
in what sequence does bootstrap code work to locate cisco ios software?
The bootstrap code checks the boot field of the configuration register. The boot field tells the router how to boot up.
The bootstrap code executes the specifications of the configuration register boot field
If the router searches for and finds valid Cisco IOS images in flash memory, it loads the first valid image and runs it.
If it does not find a valid Cisco IOS image in flash memory, the router attempts to boot from a network TFTP server using the boot field value as part of the Cisco IOS image filename.
After six unsuccessful attempts at locating a TFTP server, the router loads the ROM monitor.
global command to specify source of the boot image
boot system filepath
what is IFS stand for in Cisco terms
ios file system, provides a single to inteface to all file systems on Cisco device
command to list all available file systems on Cisco device
show file systems
command to copy image to tftp server
copy source destination
What is the function of the configuration register of a router?
to control how the router boots
low-level operating system used for testing and troubleshooting
Your router is booting up and has just loaded the bootstrap code. What does it do next if the configuration register value is 0x2102?
attempts to boot the Cisco image in flash memory
During the Cisco router boot process, what does the router do if the boot field value is 0x0?
runs rom monitor
To perform a password recovery, which configuration register value must you use?
command to get the PID and serial number of cisco router
show license udi
license boot module module-name technology-package package-name
Enables the evaluation license. Use the ? command with the module command to see the module name for your router and with the technology-package command to see the software packages and features that are supported on your router.
command to permanently install a feature license
license install stored-location-url
how to backup all license files on a router
license save file-sys://lic-location
how do you restore a license file to a router?
use the license install command
steps to remove license file from a device
1. disable the technology package ie license boot module c3900 technology-package uck9 disable 2. remove the license file ie no license boot module c3900 technology uck9 disable