MRV Communications EM316LNXNM-OT, Руководство пользователя

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EM316LNXNM-OT Appendix
PN 1275005-100 Rev E6 170
4.5. All usernames and passwords fail to login
This procedure requires connection through the local RS-232 console CLI. Some user settings may be lost
through this procedure. Before following the procedure listed below, make sure that it is safe to interrupt
operation.
1. Power-cycle the EM316LNXNM by one of the following methods:
• Remove, pause, and reinsert the management card
• Cycle power to the chassis
• Cold reset the manager module
2. After the "
Hit any key to stop autoboot:
" message displays but during the count down,
hit any key to enter the boot ROM user interface.
3. At the "
=>
" prompt, enter the following command to set the "
runlevel
" parameter to "S":
=> setenv runlevel S
=> run bfl
4. The "
run bfl
" ("boot from flash") command initiates a Linux shell with a "
sh-3.2#
" prompt. The
commands entered in the following session use common Linux shell rules. Enter the command below
exactly as listed:
sh-3.2# mv /config/startup-config /config/old-startup-config
This command changes the "
startup-config
" file name so that the failed configuration is not
automatically used in the boot process.
The "
reboot -f
" command below restarts the LNXNM with the factory default configuration:
sh-3.2# reboot -f
Once the login prompt appears, login with the factory default username and password combination:
"
admin / admin ".
5. After a successful login, examine the " old-startup-config " file to see if you can salvage any
data from it. Use any known good data in " source old-startup-config " to create a new " old-
startup-config " file and some of the old configuration.
Sourcing the old configuration file ( old-startup-config ) resets the "admin" user
password to the failed one saved in the old file! Since this password may be unknown,
assign a known password to the "admin" user with the "
username admin password
new-password " command immediately following the " source " command used to
retore the old configuration.
6. Immediately use the " write file " command to save the new configuration and password back to
the " startup-config " file BEFORE signing out.