Configuration Caching; Operations In Boot Mode; Displaying Boot Information - Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Configuration Manual

Configuration Caching

Configuration caching prevents the system from being partially configured with
changes in the event of a reset. When a script or macro begins execution, the resulting
configuration changes are automatically cached in system RAM rather than being
committed to nonvolatile storage (NVS). When the script or macro completes
execution, the cache is flushed as a background operation, saving the configuration
changes to NVS.
If the SRP module resets during the script or macro execution, the system boots as
though the script were never started because no NVS files have changed. If the SRP
module resets during the flush operation, the system boots with factory defaults.
If you start another script or macro in the middle of an ongoing flush operation, the
current flush is halted; now if the SRP module resets during the script, the system
boots with factory defaults.
If you issue the reload command to manually reset the system, the system checks
for an ongoing cache flush and warns you if a flush operation is discovered.

Operations in Boot Mode

To access Boot mode:
1.
2.

Displaying Boot Information

You can display information about the system's booting configuration, installed
hardware versions, and installed software versions.
host1(config)#service ctrl-x-reboot
Use the no version to disable this feature.
See service ctrl-x-reboot.
Reload the system from Privileged Exec mode:
host1#reload
WARNING: Execution of this command will cause the system to reboot.
Proceed with reload? [confirm]
Reload operation commencing, please wait...
7
Press the <mb > key sequence (case-insensitive) during the countdown that is
displayed immediately after the BPOST tests are bypassed. This puts the CLI in
Boot mode.
:boot##
If you do not press the <mb> key sequence before the countdown timer expires,
the reloading process continues and returns the CLI to the normal User Exec
mode.
Chapter 9: Booting the System
Operations in Boot Mode
517