Booting with the –i option – Znyx Networks bh5700 User Manual
Page 87
configuration files contained in
/ e t c / r c Z . d
In order to telnet into the box, there must be a
configured interface with a proper IP address. For example, zhp0 is configured with the IP
address 10.0.0.43 in the factory default configuration.
Booting with the –i option
If you cannot telnet into the switch and Linux fails to boot, it is likely that a change saved by
zsync has left the switch in an inaccessible state. To allow users to recover from mistakes saved
in the overlay file system, a boot argument of
–i passed to the init process will stop the
untarring of the saved overlay files. As a result, the system boots to the factory-shipped
configuration.
•
Connect through the console port. During boot up, the system displays the Linux boot string.
Linux/PPC load: for 5 seconds. During the 5 second pause, enter the boot option -i
and press Return
Linux/PPC load: root=/dev/ram init=/sbin/init -i
•
Initiating the –i option of zbootcfg.
zbootcfg –d 1 –i
•
Reboot the system. After the reboot, clear the –i option from the boot string. Enter the
following command:
zbootcfg –d 1
The reboot command will also take -i as an option and pass it to the Linux boot,
reboot -i
•
When the system boots, the overlay file system is returned to the factory-installed
configuration. At this point, you have a few options.
•
Run zsync and the factory-installed system will be restored to your flash.
CAUTION: All changes you have made and saved prior to the zsync command will
be lost.
•
Restore particular files from the existing overlay. Use the zmnt command to mount the
overlay in a designated directory and copy back just the changes you want to keep from the
existing overlay. For example, if you wanted to recover your /etc/hosts file from the
existing overlay, use zmnt to mount the overlay in a designated directory, like /tmp, then
copy
/tmp/etc/hosts to /etc/hosts. Lastly, use zsync to save your changes.
zmnt /tmp
cp /tmp/etc/hosts /etc/hosts
Ethernet Switch Blade User's Guide
release 3.2.2j
page 87