30-7z If the IP address and the domain name of the TFTP server are not contained in the DHCPresponse or they are illegitimate, the device broadcasts a TFTP request to the TFTP server.z When broadcasting a TFTP request, the device obtains the configuration file from the TFTP serverwho responds the first. If the required configuration file does not exist on the TFTP server, thenobtaining the configuration file fails, and the device removes the temporary configuration andstarts up without loading the configuration file.z When the device broadcasts a TFTP request to the TFTP server, you need to configure the UDPHelper function on a gateway to transfer broadcasts to unicasts and forwards the unicasts to thespecified TFTP server if the device performs the automatic configuration and the TFTP server arenot in the same segment because broadcasts can only be transmitted in a segment. For thedetailed description of the UDP Helper function, refer to UDP Helper Configuration in the IPServices Volume.Executing the Configuration FileUpon successfully obtaining the configuration file, the device removes the temporary configuration andexecutes the obtained configuration file; otherwise, it removes the temporary configuration and startsup without loading the configuration file.After the device executes the configuration file obtained, the configuration file will be deleted.Therefore, you are recommended to save the configuration using the save command; otherwise, thedevice needs to perform the automatic configuration function after system reboot. For the detaileddescription of the save command, refer to File System Management Configuration in the SystemVolume.
