Operating instructions

Configuration / diagnostics using remote mechanisms
5.2 Configuration with Web Based Management (WBM)
Industrial Ethernet SCALANCE X-100 and SCALANCE X-200 Product Line
5-8 Operating instructions, 09/2006, A5E00349864 Release 7
5.1.3 Configuration with DHCP
The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows the dynamic
configuration of IP addresses and provides additional information.
This allows the use of a limited number of existing IP addresses by managing the address
assignment centrally. When a PC is first turned on in a LAN, the PC logs on at a server with
this service. The server assigns a free IP address so that at the next startup, a connection is
not absolutely necessary.
Properties of DHCP
• The use of DHCP is not restricted to the startup phase. DHCP can also be used during
operation.
• The IP address remains valid for a period set by the DHCP server known as the "lease
time". When this expires, the DHCP server must be requested to assign an IP address
again.
• Generally, there is no fixed address assignment; in other words, when a client requests
an IP address again, it is normally assigned a different address. It is, however, possible to
configure the DHCP server so that it makes a fixed address assignment.
RFC - Request for Comments
The following RFC can be downloaded from the Internet:
RFC 2131 - Dynamic Host Configuration Protocol
5.2 Configuration with Web Based Management (WBM)
5.2.1 Principle
With Web Based Management, the Industrial Ethernet switches of the SCALANCE X-200
product line provide various diagnostic functions that can be controlled using an Internet
browser (for example the Microsoft Internet Explorer or Netscape).
The functions are controlled using a Java script stored on the Industrial Ethernet switches of
the SCALANCE X-200 product line that can be loaded by the browser.
To access Industrial Ethernet switches of the SCALANCE X-200 product line, the IP address
of the device must be entered in the address box of the browser.
5.2.2 Requirements for Web Based Management
To access Industrial Ethernet switches of the SCALANCE X-200 product line over WBM, the
following requirements must be met: