Znyx Networks bh5700 manual Booting with the -i option, ∙ Reboot the system

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 –ipassed 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 –ioption of zbootcfg. zbootcfg –d 1 –i

∙Reboot the system. After the reboot, clear the –ioption 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.

NOTE: 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 zsync /etc/hosts

∙Reboot the system.

Ethernet Switch Blade User's Guide release 3.2.2j page 141