Skip to main content

Cisco Router Factory Reset

A simple one, don't do it often so thought I'd add it in a post so if I ever forget I know where to look. Theres two ways of doing it.

Method 1, Using the config-register 0x2102

router> enable
router# configure terminal
router(config)# config-register 0x2102
router(config)# end
router# write erase
router# reload
router# System configuration has been modified. Save? [yes/no]: n
Proceed with reload? [confirm]

Method 2, Using the config-register 0x2142

router> enable
router# configure terminal
router(config)# config-register 0x2142
router(config)# end
router# reload
router# System configuration has been modified. Save? [yes/no]: n
Proceed with reload? [confirm]
router> enable
router# configure terminal
router(config)# config-register 0x2102
router(config)# end
router# write memory
router# reload
router# System configuration has been modified. Save? [yes/no]: n
Proceed with reload? [confirm]

Note: the following configs are not reset to factory defaults using these methods as they are stored in ROMMON:

warm-reboot
memory-size iomem

Labels:

Popular posts from this blog

Mac OS X "SOE" Day 7

Page Redirection > continued from day 6... In summary, here is my method for creating a Mac OS X 10.7.3 Standard Operating Environment "SOE" Image. Overview The goal is to create a "MASTER" non-booted SOE that can be used with multiple models and it multiple sites with different local requirements. My intention is to use this "MASTER" image in a manual restore procedure due to the fact netboot facilities cannot be made available to all the sites I support however the DMG files are netboot compatible. Requirements Lion Recovery Disk Assistant v1.0 "TARGET" workstation. A compatible workstation that will be used to install Mac OS X 10.7.3 and capture a DMG image(s). "ADMIN" workstation. A workstation with Disk Utility that you will use to capture your DMG image(s). External storage such as a USB HARD DISK. Setup Downloaded the Lion Recovery Disk Assi...
more...

Mac OS X "SOE" Day 3

Page Redirection > continued from day 2... Ready to copy my scripts over, as previously mentioned I am thinking of having 3 phases; build - preps the image for dmg capture. firstboot - runs anything I can't do in build ie, writing to byhost files etc that require UUID or Macaddress. Basically machine/model specific settings. localise - runs localisation scripts such as language, locale etc etc. Basically a set of dynamic scripts in case you are an admin for multiple offices, multiple countries. So what's the minimum we need in the "build" phase? Disable the Setup Wizard. Disable the Registration Wizard. Create a local admin user(s) and set autologin for the firstboot phase. Enable root (set the password). Enable SSH Access Enable VNC Access Enable ARD Access Disable softwareupdate automatic updates "schedule" Cleanup/Minimise the dmg where possible. Set a firstboot loginhook for the second phase. What are some other n...
more...

Mac OS X "SOE" Day 5

Page Redirection > continued from day 4... Continuing on from the "build" phase setup we need to script our "firstboot" options. The last step in the build phase set our "firstboot" script as  "/var/root/firstboot.sh". So what's the minimum we need in the "firstboot" phase? There isn't really a minimum for this phase as you can do most of this stuff at localisation phase. The main things I do here relate to writing prefs that a machine specific ie, contain UUID or MACADDRESS Setting default screensaver Setting default menu extras Run Apple Software updates that require a booted OS Set the initial HOSTNAME, LOCALHOSTNAME and COMPUTERNAME Set the initial Energy Saver settings Disable some Network Services (firewire, bluetooth) Set the initial Network Services Order Disable IPv6 Couple things you will need to know for this stage, how to get the UUID and/or the MACADDRESS. Post 2010 macs seem to use t...
more...