To resolve the issue, use the following procedure to recover the root password for SRX Branch devices running on Junos release versions 10.0R1, 10.0R2, and 10.1R1. This involves disabling watchdog functionality to allow the system to properly boot into single-user mode.
Press the power button on the front panel to power on the router. Verify that the POWER LED on the front panel turns green. The console should continuously display the boot message.
When the prompt appears, press the spacebar to access the router’s bootstrap loader and type these commands:
Hit [Enter] to boot immediately, or space bar for command prompt.
Booting [kernel] in 9 seconds...
Loader>
Loader> watchdog disable
Loader> boot –s
The firewall starts up in single-user mode. In single-user mode, a multiuser operating system such as Junos boots into a single superuser. Single-use mode is mainly used for maintenance of multi-user environments such as network servers.
At the prompt, enter " recovery " to start the root password recovery procedure.
System watchdog timer disabled
Enter full pathname of shell or 'recovery' for root password recovery or RETURN for /bin/sh: recovery
The device directly enters operational mode without asking for an user ID or password..
Starting CLI ...
root@host> edit
When in configuration mode, set the root password.
root@host# set system root-authentication plain-text-password
On pressing the return key, type in the new root password. Reenter the new root password when the second prompt appears.
New password: juniper1
Retype new password: juniper1
Commit the changes.
root@host# commit
commit complete
Reboot the device again.
root@host# run request system reboot
Reboot the system ? [yes,no] (no) yes
The boot messages display on the console.
Press the spacebar one time, to access the router’s bootstrap loader prompt. This sequence appears on the console:
Hit [Enter] to boot immediately, or space bar for command prompt.
Booting [kernel] in 9 seconds...
Loader>
Loader> watchdog enable
Loader> boot
The device reboots again and this time it asks for an user ID and password. Enter the newly configured password.
Wed Jun 16 14:20:21 UTC 2010
Amnesiac (ttyu0)
login: root
Password: juniper1
For more information, refer to PR499745 .
Modification History
2019-08-28: Article reviewed for accuracy. Only applicable on the specific versions
request system zeroize 공장초기화
리부팅
set system root-authentication plain-text-password
commit
show system chassis ,, J 대문자 Juniper
set chassis cluster disable reboot 이중화 종료
delete interfaces vlan unit 0 family inet address 192.168.1.222/24
root# show | display set
request system power-off at now 시스템 종료
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