Znyx Networks bh5700 manual Boot Flow Chart

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 6.2: Boot Flow Chart

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 6.3: 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 85