Entering the IP Parameters
Basic Configuration
Release
6.0
07/2010
2.7
System Configuration via DHCP
Option 82
49
2.7 System Configuration via
DHCP Option 82
As with the classic DHCP, on startup an agent receives its configuration data
according to the “BOOTP/DHCP process” flow chart (see fig. 13).
While the system configuration is based on the classic DHCP protocol on the
device being configured (see on page 46 “System Configuration via DHCP“),
Option 82 is based on the network topology. This procedure gives you the
option of always assigning the same IP address to any device which is
connected to a particular location (port of a device) on the LAN.
The installation of a DHCP server is described in the chapter “Setting up a
DHCP Server with Option 82“ on page 224.
Figure 15: Application example of using Option 82
PLC
Switch (Option 82)
IP =
10.0.1.100
IP =
10.0.1.100
MAC address =
00:80:63:10:9a:d7
DHCP server
IP =
10.0.1.1
MACH 4002
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