Kontron AM4530 - Manual (Page 39)

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4.4.10.4 Setting-up DHCP Server
1 Specify the correct IP addresses in /etc/udhcpd.conf:
start 192.168.100.20
end 192.168.100.254
2 Add the pxe boot option to DHCP server configuration in /etc/udhcpd.conf:
siaddr 192.168.100.10
boot_file pxelinux.0
3 Start the DHCP server.
# /etc/init.d/dhcp-server start
Or use the following commands to make sure this is done automatically during boot.
ln -sf /etc/init.d/dhcp-server /etc/rcS.d/S50dhcp-server
4.5 Upgrading the Software
4.5.1 Upgrading from Uboot
To upgrade all components(uboot + kernel + rootfs) from Uboot, use the following commands to upgrade the
whole image (all.img is the upgrade image) when connected to a DHCP server:
dhcp
tftp $(uboot_download_addr) all.img
run all_update
run update
Use the following connands when using a static IP address (192.168.100.1 must be replaced by the tftp
server address):
setenv gatewayip 192.168.100.1
setenv serverip 192.168.100.1
tftp $(uboot_download_addr) all.img
run all_update
run update
Note:
The current SPI flash is not modified. The new file image is programmed on the other flash and after
the reset, the CPU will boot on the other flash.