Westermo RedFox Series - Manual (Page 90)

Westermo OS Management Guide
Version 4.17.0-0
7.1.2 System bootstrap
During system bootstrap, the bootloader firmware is responsible for loading the
system firmware. This is described further in
section 7.1.2.1 .
As part of the bootstrap, the WeOS unit is also capable of conducting a cable fac-
tory reset (
section 7.1.3.3 . The configuration is typically read from flash (startup-
configuration file), but it is possible to retrieve the configuration from USB ( sec-
tion 7.1.6 - 7.1.7 ), or via BOOTP. Options for controlling these and other bootstrap
related settings is covered in section 7.1.2.2 .
7.1.2.1 Loading System Firmware (WeOS)
The bootloader attempts to load the primary system firmware image, with fall-
back to loading the secondary system firmware if fails to load the primary firmware.
As described further below, different WeOS products use different bootloaders
(Barebox, U-boot or RedBoot).
The Barebox bootloader enables you to stop the bootstrap process (from console
port, press Ctrl-C at system startup), and enter an interactive boot-menu.
Example
Barebox Boot Menu
1: Primary Partition
2: Secondary Partition
3: Network (BOOTP)
4: System Recovery
5: Shell
Access to the Barebox boot-menu can be password protected ( section 7.1.2.2 ).
From the boot-menu you can select which system firmware image (WeOS) to
load (primary or secondary image on flash), but you can also choose to download
a firmware remotely via TFTP into RAM, by entering the rescue-mode (System
Recovery).
Note
As of WeOS v4.17.0, use of BOOTP in the Barebox boot-menu (alternative
”3.”) is a technology preview. Use of TFTP (rescue mode) or BOOTP is
limited to Ethernet ports with ”internal PHY”; SFP ports can for example not
be used.
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