In using a router to use it, we often encounter routing forgotten password or lost, here we will introduce a number of Cisco router password recovery techniques, where the out come and share with you the hope for all of us. To protect the network security, understanding of Cisco router password recovery is necessary, but if you forgot the router password on the administrator is concerned is not a small loss. Through research and practice, I found the right Cisco router password recovery methods, this method 1500,1600,1700,2500,2600,3600 series Cisco routers are applicable to, the following example writer 2610 router.
In the Cisco router has a configuration registration key, namely, Configuration register value, use the show version command, in the last line you can see its value, which is composed of four 16 hex numbers, such as 0×2102, using binary representation is 0010000100000010 , it is called after 4 Boot field, the value of router Boot field according to the decision where to start from the IOS system, specified as the table below. It is the sixth bits (with the underlined bit) is usually “0″, if it is “1″ indicates to the router to bypass the startup configuration file into the Startup mode, a password prompt when there is no direct access privileges on the configuration Model, then by modifying the value of the sixth place on the purpose of password recovery can be achieved.
Because if you don’t, and there’s no one accessible who does, you charge to accomplish a countersign accretion address on the router – after abatement the accepted configuration. This involves manipulating the config register, and a misstep actuality can be baleful to the router’s affairs of recovery!
Obviously, that can accomplish you appealing afraid about alteration the config register, CCNA or not. Altered Cisco routers and switches accept altered techniques for countersign recovery, so the afterward altercation is bound to the 2500 series. If you charge to do this for addition model, do a quick seek engine analysis for “password accretion cisco” and you should bound acquisition a certificate for the Cisco router you’re alive with.
For the 2500 series, you alpha by reloading the router and sending a BREAK arresting during the aboriginal 60 abnormal of the reload. Depending on the terminal affairs you’re using, this can be the hardest allotment of the absolute process! For most, just columnist CTRL-BREAK during this one-minute period. If this doesn’t work, you may charge to analysis Help in your terminal affairs to acquisition out how to forward this breach signal.
This config annals ambience doesn’t abolish anything, but it does accomplish the router avoid the capacity of NVRAM. This agency that you’ll be prompted to go into the alarming Setup Mode, which you do NOT ambition to do. Simply columnist “N” and blazon “enable” if you’re at the router prompt. (If you do go into Setup Mode, you can consistently get out with CTRL-C, a accessible command to apperceive for the CCNA assay and for absolute life, as you can see!)
Be actual accurate with the next step. You ambition to access the command “configure memory” or “copy alpha run” at this point – don’t access “write memory” or “copy run start”. Success on the CCNA assay and in alive with real-world networks is all about the details, and this is a actual important detail.
At this point, you can attending at the active agreement and see the passwords, and change them if you wish. However, we’re not done. The config annals needs to be set aback to its absence of 0×2102, and you do so with the all-around command “config-register 0×2102″. Now you ambition to save your config with “write memory” or “copy run start”, and reload the router. The router will now cossack as it commonly would.
Knowing how to balance from a absent countersign is a basic accomplishment for both the Cisco CCNA acceptance assay and for success in real-world networks. It’s not something we accept to do every day, but if the time calls for it, we accept to do it accurately and absolutely – and that includes that final config-register change!