Axel Remote Management V2 - Manual (Page 76)

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Axel Remote Management
After several seconds AxRM will confirm the command executed successfully
as below:
Important: After the new IP address the terminal is automatically rebooted.
7.2 - USING BOOTP TO RELOAD FIRMWARE
7.2.1 - Basic Concept
For certain Axel products firmware download comprises of a critical phase
where the existing firmware is erased and the new firmware has not
downloaded. If a problem occurs during this phase (i.e. network incident or
corrupt firmware file) the Axel product can be left without valid firmware. In this
situation, on booting, it follows a certain procedure.
The terminal sends out a BOOTP broadcast on the network to recover the
parameters necessary download new firmware. These parameters are: terminal
IP address, name of the firmware file and the TFTP server address.
Providing a BOOTP server is listening for such a request and that the BOOTP
server "recognises" this product (from to its Ethernet address), the firmware is
reloaded.