Patton electronic SmartNode 4110 Series manual Boot procedure

SmartWare Software Configuration Guide 5 • System image handling

Boot procedure

During a normal boot procedure of a SmartNode, the bootstrap application checks for an application image in the persistent memory of the logical region nvram:. The application image is then executed, i.e. the SmartWare is started module by module. One of the last start-up tasks to finish in bringing up the entire system is han- dling the operating configuration. The configuration startup-configis copied from the logical region nvram: in nonvolatile memory to the logical region running-configin the volatile memory. The SmartWare now uses the running-configto set up the operating configuration of the SmartNode. Figure 9 illustrates the boot procedure.

Power-On

Bootstrap

pressed

Reset Button

released

Bootloader

Application

Image

invalid

valid

Application

start Software Modules

System Button

released

use startup-config

pressed

use factory-config

System Up

Figure 9. Boot procedure

There are two situations during bootstrap when the bootloader takes control:

•“If the user has pressed the system button, it launches the bootloader, the bootstrap application checks the status of the Reset button (not available for SN4xxx) on the back panel of the SmartNode.”

•If a valid application image is not available

Boot procedure 74