Znyx Networks bh5700 manual Booting up Process Flow

Bootloader examines the
bootstring in the boot
ROM
Determines	Yes	Loads image
if the boot string		from Flash 1
is dev1		to RAM
No
Determines	Yes	Loads image
if the boot String		from Flash 2
is dev2		to RAM
No
Boot into		Begins
zmon bootloader		execution of
		RAM image

Figure 9.2: Booting up Process Flow

Under normal circumstances, the booting up process follows the process outlined in Figure 6-2. During boot up, the zmon bootloader reads the device bootstring to locate and validate the correct application image to load. The bootstring command is in the following format:

boot : X [<options>] X represents the device value 0, 1 or 2

The boot process opens and uncompresses the initrd image onto the RAM disk. Then zmon begins booting the Linux image. After Linux boots, the init process executes the /etc/init.d/rcS script which, in turn, executes /etc/rcZ.d/rc (see Figure 9.3: Init Script Flow)). The /etc/rcZ.d/rc script runs S* files in /etc/rcZ.d, with the start parameter. The S* files are the switch configuration files (for example, S50layer2).

Ethernet Switch Blade User's Guide release 3.2.2j page 139