HP manual 151

Obtaining the configuration file

Figure 51 Obtain the configuration file

	Is the configuration file
	contained in the DHCP
	response?
No		No
	Obtain the network
	intermediate file
Yes		Yes
	Search the domain name
	corresponding to the IP address
	in the network intermediate file
		No
	Resolve an IP
	address to a domain
	name through DNS
		Yes
Yes	Obtain the configuration
	file corresponding to the
	domain name

No

Yes

No

	Yes	Obtain the default		No	Obtain the specified
		configuration file			configuration file in the
					response
			No			Yes
		Remove the temporary
Remove the temporary
		configurations and the device
configurations and execute the
		starts without loading the
obtained configuration file
		configuration file

A device obtains its configuration file by using the following workflow:

•If the DHCP response contains the configuration file name, the device requests the specified configuration file from the TFTP server.

•If not, the device tries to get its host name from the host name file obtained from the TFTP server. If it fails, the device resolves its IP address to the host name through DNS server. Once the device gets its host name, it requests the configuration file with the same name from the TFTP server.

•If all the operations fail, the device requests the default configuration file from the TFTP server.

TFTP request sending mode

The device selects to unicast or broadcast a TFTP request by using the following workflow:

•If a legitimate TFTP server IP address is contained in the DHCP response, the device unicasts a TFTP request to the TFTP server.

•If not, the device resolves the TFTP server domain name contained in the DHCP response to the IP address through the DNS server. If successful, the device unicasts a TFTP request to the TFTP server; if not, the device broadcasts a TFTP request.

•If the IP address and the domain name of the TFTP server are not contained in the DHCP response or they are illegitimate, the device broadcasts a TFTP request.

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