ETHERNET • 279
Network communication
Modular I/O System
ETHERNET TCP/IP
5.2.3.2
Bootstrap Protocol (BootP)
The BootP protocol defines a request/response mechanism with which the
MAC-ID of a fieldbus node can be assigned an IP address.
For this a network node is enabled to send requests into the network and call
up the required network information, such i.e. 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.
This is available free from WAGO over the Internet at www.wago.com.
i
More information
The procedure for address allocation with the WAGO BootP Server is de-
scribed in detail in the Chapters 3.1.6.4 and 3.2.6.4 "Allocating the IP address
to the fieldbus node".
5.2.3.3
HyperText Transfer Protocol (HTTP)
HTTP is a protocol used by WWW (World Wide Web) servers for the for-
warding of hypermedia, texts, images, audiodata etc.
Today, HTTP forms the basis of the Internet and is also based on requests and
responses in the same way as the BootP protocol.
The HTTP server implemented in the ETHERNET fieldbus coupler is used for
viewing the HTML pages saved in the fieldbus coupler. The HTML pages
provide information about the fieldbus coupler (state, configuration), the net-
work and the process image.
The HTTP server uses port number 80.