Specifications

Installation and startup procedure
64
3.4 Basic settings
RS2-4R
Release 1.0 03/04
3.4.6 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 (dynamic host
configuration protocol)” on page 61), 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 233.
Fig. 15: Application example of using Option 82
PLC
Switch (Option 82)
IP =
149.218.112.100
IP =
149.218.112.100
DHCP-Server
IP =
149.218.112.1
MACH 3002
RS2-4R
MAC =
00:80:63:10:9a:d7