Allen-Bradley armorstratix 5700, User Manual, Page: 113 / 458

Rockwell Automation Publication 1783-UM007I-EN-P - December 2017 113
Configure Switch Features Chapter 3
In this example, the active ring DHCP server recognizes IP address requests
from ring devices 3, 4, and 6 and responds with the position-based IP address
specified in the DHCP table (
Table 38 ). The ring device index numbers in the
DCHP table begin incrementing in order from the device connected to the
lowest DLR port. For example, in
Figure 16 , the DLR ports are Gi1/1 and
Gi1/2. The lowest DLR port is Gi1/1, so the device connected to Gi1/1 has an
index number of 2.
Figure 16 - DHCP for Ring Devices
Com
IN2
Ref
IN1
Alarm
IN1 IN2 OUT
DC+
Pwr A
Express
Setup
C
o
nsole
DC-
DC+
Pwr B
Com
IN2
Ref
IN1
Alarm
IN1 IN2 OUT
DC+
Pwr A
Express
Setup
C
o
nsole
DC-
DC+
Pwr B
Ring Device 1
•
Active Ring Supervisor
• Active Ring DHCP Server
• Static IP Address: 192.168.1.10
Ring Device 2
•
Backup Ring Supervisor
• Backup Ring DHCP Server
• Static IP Address: 192.168.1.11
Outside Network
DLR Port Gi1/1
DLR Port Gi1/2
Ring Device 3
BOOTP IP Address:
192.168.1.12
Ring Device 4
DHCP IP Address:
192.168.1.13
Ring Device 5
Static IP Address:
192.168.1.14
Ring Device 6
BOOTP IP Address:
192.168.1.15
Table 38 - Example DHCP Table for Ring Devices
Ring Device Index
(1)
IP Address Host Name DHCP Pool
2
3 192.168.1.12 Rack 2 Pool 1
4 192.168.1.13 Rack 3 Pool 1
5
6 192.168.1.15 Rack 5 Pool 1
(1) Index 1 represents the active ring DHCP server and is not configurable.
ATTENTION: Use caution with automatic IP address assignment when
wiring DLR with symmetric devices. The controller cannot detect incorrect IP
addresses of identical devices in the wrong position.