LAN topology recommendations

C LAN	Control system local area network
B LAN	Facility local area network
ID	Description	“C” LAN settings	“B” LAN settings
1	IOT Linker	IP: 192.168.10.1 LAN port	IP: from B LAN DHCP server WAN port
2	Control system LAN Ethernet switch	-	-
3	Controllers	IP: 192.168.10.20 - .99	-
4	Various control system devices with LAN connection (SCADA work-stations, operator touch panels, …)	-
5	Facility LAN Ethernet router / switch	-	-
6	Facility LAN Ethernet devices (computers, printers,…)	-	-
General “C” LAN settings
DHCP Server	Implemented in IOT Linker
192.168.10.100 - 192.168.10.150
Subnet Mask	255.255.255.0
Gateway	192.168.10.1
DNS 1	208.67.222.222
DNS 2	208.67.220.220
DNS 3	1.1.1.1
DNS 4	1.0.0.1

Alternative Topology

The control system is connected to the business network. All protections are provided by the business network administrator!

B LAN	Facility local area network
ID	Description	“B” LAN settings
1	IOT Linker	IP: from B LAN DHCP server WAN port
2	Facility LAN Ethernet switch	-
3	Controllers	IP: from B LAN DHCP server
4	Various control system devices with LAN connection (SCADA work-stations, operator touch panels, …)
5	Facility LAN Ethernet router / switch	-
6	Facility LAN Ethernet devices (computers, printers,…)	-