Configuration / diagnostics using remote mechanisms
6.1 Assignment of an IP address
SCALANCE X-200
154 Operating Instructions, 12/2011, A5E00349864-19

6.1.3 Configuration with DHCP

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows the dynamic
configuration of IP addresses and provides additional information.
During initial startup, the network node registers with a server that provides the DHCP
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