HP J7949E manual If you choose to re-enable a Dhcp configuration

If you change to BOOTP configuration, the DHCP-configured parameters are released and the TCP/IP protocol is initialized.

If you change to Manual configuration, the DHCP-configured IP address is released and the user-specified IP parameters are used.

Therefore, if you manually provide the IP address, you should also manually set all of the configuration parameters, such as subnet mask, default gateway, and idle timeout.

Note	If you choose to re-enable a DHCP configuration,
	the print server will acquire its configuration
	information from a DHCP server. This means that
	when you choose DHCP and complete your
	configuration session (using Telnet, for example),
	the TCP/IP protocol for the print server is
	re-initialized and all current configuration
	information is deleted. The print server then
	attempts to acquire new configuration information
	by sending DHCP requests on the network to a
	DHCP server.

For DHCP configuration through Telnet, refer to “Using Telnet” in this chapter.

ENWW TCP/IP Configuration 63