Flasher cisco 801
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omari
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12 déc. 2001 à 18:00
brupala Messages postés 110761 Date d'inscription lundi 16 juillet 2001 Statut Membre Dernière intervention 8 janvier 2025 - 12 déc. 2001 à 18:12
brupala Messages postés 110761 Date d'inscription lundi 16 juillet 2001 Statut Membre Dernière intervention 8 janvier 2025 - 12 déc. 2001 à 18:12
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brupala
Messages postés
110761
Date d'inscription
lundi 16 juillet 2001
Statut
Membre
Dernière intervention
8 janvier 2025
13 890
12 déc. 2001 à 18:12
12 déc. 2001 à 18:12
Recovering a Lost Enable Password
This section describes how to recover a password that you configured with the enable command (enable password).
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Note You can recover a lost enable password but not a password that you configured with the enable secret command (enable secret password). This password is encrypted and must be replaced with a new enable secret password. See the "Hot Tips" section on Cisco Connection Online (CCO) for information on replacing enable secret passwords.
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Follow these steps to recover a lost enable password:
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Step 1 Connect an ASCII terminal or a PC running a terminal emulation program to the Console port. For more information, see the Cisco 800 Series Routers Hardware Installation Guide.
Step 2 Configure the terminal at 9600 baud, 8 data bits, no parity, and 1 stop bit.
Step 3 Reboot the router.
Step 4 From the user EXEC mode, display the existing configuration register value:
Router> show version
Step 5 Record the setting of the configuration register.
The setting is usually 0x2102 or 0x102.
Step 6 Record the break setting.
Break enabled—bit 8 is set to 0.
Break disabled (default setting)—bit 8 is set to 1.
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Note To enable break, enter the config-register 0x01 global configuration command.
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Step 7 Do one of the following:
If break is enabled, go to Step 8.
If break is disabled, turn the router off, wait 5 seconds, and turn it on again. Before the terminal displays Boot..., press Escape or Control-C. The terminal displays the ROM monitor prompt (boot#).
Go to Step 9.
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Note Some terminal keyboards have a key labeled Break. If your keyboard does not have a Break key, refer to the documentation that came with the terminal for instructions on how to send a break.
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Step 8 Send a break. The terminal displays the following prompt:
boot#
Step 9 Reset the configuration register:
boot# set ios-conf = 142
Step 10 Initialize the router:
boot# boot [flash]
The router cycles its power, and the configuration register is set to 0x142. The router uses the boot ROM system image, indicated by the system configuration dialog:
--- System Configuration Dialog ---
Step 11 Enter no in response to the prompts until the following message is displayed:
Press RETURN to get started!
Step 12 Press Return. The following prompt appears:
router>
Step 13 Enter privileged EXEC mode:
router> enable
The prompt changes to the privileged EXEC prompt:
router#
Step 14 Display the enable password in the configuration file:
router# show startup-config
Step 15 Enter configuration mode:
router# configure terminal
Step 16 Reset the configuration register:
router# config-register value
Specify the value that you recorded in Step 5 (usually 0x2102 or 0x102).
Step 17 Press Ctrl-Z to exit configuration mode.
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Note To return to the configuration being used before recovering the lost enable password, do not save the configuration changes before rebooting the router.
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Step 18 Reboot the router and enter the recovered password.
This section describes how to recover a password that you configured with the enable command (enable password).
--------------------------------------------------------------------------------
Note You can recover a lost enable password but not a password that you configured with the enable secret command (enable secret password). This password is encrypted and must be replaced with a new enable secret password. See the "Hot Tips" section on Cisco Connection Online (CCO) for information on replacing enable secret passwords.
--------------------------------------------------------------------------------
Follow these steps to recover a lost enable password:
--------------------------------------------------------------------------------
Step 1 Connect an ASCII terminal or a PC running a terminal emulation program to the Console port. For more information, see the Cisco 800 Series Routers Hardware Installation Guide.
Step 2 Configure the terminal at 9600 baud, 8 data bits, no parity, and 1 stop bit.
Step 3 Reboot the router.
Step 4 From the user EXEC mode, display the existing configuration register value:
Router> show version
Step 5 Record the setting of the configuration register.
The setting is usually 0x2102 or 0x102.
Step 6 Record the break setting.
Break enabled—bit 8 is set to 0.
Break disabled (default setting)—bit 8 is set to 1.
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Note To enable break, enter the config-register 0x01 global configuration command.
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Step 7 Do one of the following:
If break is enabled, go to Step 8.
If break is disabled, turn the router off, wait 5 seconds, and turn it on again. Before the terminal displays Boot..., press Escape or Control-C. The terminal displays the ROM monitor prompt (boot#).
Go to Step 9.
--------------------------------------------------------------------------------
Note Some terminal keyboards have a key labeled Break. If your keyboard does not have a Break key, refer to the documentation that came with the terminal for instructions on how to send a break.
--------------------------------------------------------------------------------
Step 8 Send a break. The terminal displays the following prompt:
boot#
Step 9 Reset the configuration register:
boot# set ios-conf = 142
Step 10 Initialize the router:
boot# boot [flash]
The router cycles its power, and the configuration register is set to 0x142. The router uses the boot ROM system image, indicated by the system configuration dialog:
--- System Configuration Dialog ---
Step 11 Enter no in response to the prompts until the following message is displayed:
Press RETURN to get started!
Step 12 Press Return. The following prompt appears:
router>
Step 13 Enter privileged EXEC mode:
router> enable
The prompt changes to the privileged EXEC prompt:
router#
Step 14 Display the enable password in the configuration file:
router# show startup-config
Step 15 Enter configuration mode:
router# configure terminal
Step 16 Reset the configuration register:
router# config-register value
Specify the value that you recorded in Step 5 (usually 0x2102 or 0x102).
Step 17 Press Ctrl-Z to exit configuration mode.
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Note To return to the configuration being used before recovering the lost enable password, do not save the configuration changes before rebooting the router.
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Step 18 Reboot the router and enter the recovered password.