HP PN1050 - Manual (Page 93)

NWW TCP/IP Overview 93
Configuring IP Parameters
TCP/IP configuration parameters (such as IP address, subnet mask, default
gateway) can be configured on the HP Jetdirect projector server in a variety
of ways. These values can be configured manually (for example, through the
embedded Web server, the arp and ping commands, and HP management
software), or they can be automatically downloaded using DHCP or BOOTP
each time the server is turned on. For configuration methods, see
Chapter 3 .
When powered on, a new HP Jetdirect projector server that is unable to retrieve
a valid IP address from the network will automatically assign itself a default
IP address. The default IP address will depend on the type of network to which
the server is connected. On a small private network, a technique called
link-local addressing is used to assign a unique IP address in the range of
169.254.1.0 to 169.254.254.255, which should be valid. On a large or
enterprise network, a temporary address of 192.0.0.192 will be assigned until
it is properly configured for your network. The IP address configured on your
projector server may be determined by inspecting the projector’s on-screen
Help menu.
Dynamic Host Configuration Protocol (DHCP)
DHCP allows a group of devices to use a set of IP addresses that are
maintained by a DHCP server. The device or host sends a request to the server,
and if an IP address is available, the server assigns it to that device.
BOOTP
BOOTP is a bootstrap protocol used to download configuration parameters
and host information from a network server. BOOTP uses UDP for its
transport. In order for devices to boot and load configuration information into
RAM, they must communicate through the bootstrap protocol BOOTP as a
client with their server.
To configure the device, the client broadcasts a boot request packet containing
at least the hardware address of the device (HP Jetdirect projector server
hardware address). The server answers with a boot reply packet containing
the information the device needs to configure.