Difference between revisions of "Reset a Cisco 2800 series router to factory default without the enable password"
From Peter Pap's Technowiki
(Created page with "So you have a router you want to reset, but don't know the enable password. Here's what to do: 1. Connect to the serial console. 2. Power off the router and then power on. 3....") |
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4. Type this command at the rommon prompt in order to boot from Flash. | 4. Type this command at the rommon prompt in order to boot from Flash. | ||
| − | confreg 0x2142 | + | rommon 1 > '''confreg 0x2142''' |
5. Reset the router. | 5. Reset the router. | ||
| − | reset | + | rommon 2 > '''reset''' |
6. The router should now boot into the Initial config dialogue: | 6. The router should now boot into the Initial config dialogue: | ||
| Line 19: | Line 19: | ||
Would you like to enter the initial configuration dialog? [yes/no]: yes | Would you like to enter the initial configuration dialog? [yes/no]: yes | ||
| − | 7. Follow the prompts. | + | 7. Follow the prompts, to set a basic config. |
| − | If you want to preserve the running config, follow the instructions [ | + | 8. Enter enable mode and set the router to boot from the right place |
| + | |||
| + | Router>'''enable''' | ||
| + | Router>'''conf t''' | ||
| + | Router(config)>'''config-register 0x2102''' | ||
| + | Router(config)>'''end''' | ||
| + | Router>'''wr mem''' | ||
| + | |||
| + | 9. Reload the router to check it worked properly | ||
| + | |||
| + | |||
| + | If you want to preserve the running config, follow the instructions [http://www.cisco.com/en/US/products/hw/routers/ps259/products_password_recovery09186a0080094675.shtml here]. | ||
Latest revision as of 23:37, 3 February 2013
So you have a router you want to reset, but don't know the enable password. Here's what to do:
1. Connect to the serial console.
2. Power off the router and then power on.
3. Send the router a BREAK. This should bring you to the rommon prompt
4. Type this command at the rommon prompt in order to boot from Flash.
rommon 1 > confreg 0x2142
5. Reset the router.
rommon 2 > reset
6. The router should now boot into the Initial config dialogue:
Would you like to enter the initial configuration dialog? [yes/no]: yes
7. Follow the prompts, to set a basic config.
8. Enter enable mode and set the router to boot from the right place
Router>enable Router>conf t Router(config)>config-register 0x2102 Router(config)>end Router>wr mem
9. Reload the router to check it worked properly
If you want to preserve the running config, follow the instructions here.
