Hirschmann MACH 4000 Series, User Manual

Page: 46 / 236

Entering the IP parameters
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2.7 System Configuration via DHCP Option 82
Basic - L3P
Release 3.1 06/07
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 “System configuration via DHCP” on page 43),
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 Switch) on the LAN.
The installation of a DHCP server is described in the chapter “Setting up
DHCP Server Option 82” on page 202 .
Fig. 15: Application example of using Option 82
PLC
Switch (Option 82)
IP =
149.218.112.100
IP =
149.218.112.100
MAC address =
00:80:63:10:9a:d7
DHCP server
IP =
149.218.112.1
D 0 D 0 D 0
MACH 3002
MICE