User manual

Ethernet Communication Services

33002479 06 07/2008

Address Server

Overview The following information describes the services provided by the Address Server.

z BOOTP server

z DHCP server

The DHCP server responds to both a DHCP and a BOOTP server.

BOOTP Server

The BOOTstrap Protocol (BOOTP) software, compliant with RFC 951, is used to

assign IP addresses to nodes on an Ethernet network. Devices (hosts) on the

network issue BOOTP requests during their initialization sequence. A BOOTP

server that receives the request will extract the required IP address information from

its database and place it in BOOTP response messages to the requesting devices.

The devices will use the assigned IP addresses from the BOOTP server for all

network communication.

NOE BOOTP

Server

Your NOE 771 xx module comes supplied with a BOOTP server. This feature allows

you to provide IP addresses to all the I/O devices being serviced by the NOE 771 xx.

Providing a BOOTP server that is built into your NOE 771 xx module eliminates the

need for an external BOOTP server.

You can configure your NOE 771 xx’s BOOTP server from the module’s HTTP Web

page. Configure the 140 CPU 651 x0 using the Unity Pro editors. Configuring allows

you to add to, remove from, and edit devices in the BOOTP server’s database, which

is maintained in the module’s non-volatile memory.

Note: The BOOTP server is available on the 140 NOE 771 xx models.

Note: The NOE 771 xx’s BOOTP server can not provide its own IP address.