Technical data

130 • ETHERNET
Network Communication
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
5.3.4.3 BootP (Bootstrap Protocol)
The BootP protocol defines a request/response mechanism with which the
MAC-ID of a fieldbus node can be assigned a fix IP address.
For this a network node is enabled to send requests into the network and call
up the required network information, such as the IP address of a BootP server.
The BootP server waits for BootP requests and generates the response from a
configuration database.
The dynamic configuration of the IP address via a BootP server offers the user
a flexible and simple design of his network. The WAGO BootP server allows
any IP address to be easily assigned for the WAGO fieldbus coupler/controller.
You can download a free copy of the WAGO BootP server over the Internet at:
http://www.wago.com.
More information
The procedure for address allocation with the WAGO BootP Server is
described in detail in the Chapter “Starting up an ETHERNET TCP/IP
fieldbus node”.
The BOOTP Client allows for dynamic configuring of the network parameters:
Parameter Meaning
IP address of the client Network address of the controller
IP address of the router If communication is to take place outside of the local
network, the IP address of the routers (gateway) is
indicated in this parameter.
Subnet mask The Subnet mask makes the controller able to
differentiate, which parts of the IP address determine the
network and which the network station.
IP addresses of the DNS
servers
Here the IP addresses can be entered by maximally 2
DNS servers.
Host name Name of the host
When using the bootstrap protocol for configuring the node, the network
parameters (IP address, etc... ) are stored in the EEPROM.
Note
The network configuration is only stored in the EEPROM when the BootP
protocol is used, although not if configuration is done via DHCP.
The BootP protocol is activated in the controller by default.
When the BootP protocol is activated, the controller expects a BootrP server to
be permanently present.
If, however, there is no BootP server available after a power-on reset, the
network remains inactive.
To operate the controller with the IP configuration stored in the EEPROM, you
must first deactivate the BootP protocol.