Echelon IP-852 Channel - Manual (Page 44)

36 Using NAT, DHCP, DNS on an IP-852 Channel
TP-1250 High Speed Backbone
FT-10
Channel
FT/TP-1250
Router
Figure 4.5 Connecting Devices on a Network
The high-speed backbone is a physical wire and, since all TP/XF-1250 to TP/FT-10
routers are connected to the same physical wire, communication proceeds unimpeded.
IP-852 devices are logically identical to TP/XF-1250 or TP/FT-10 routers, but use IP as
their high-speed backbone instead of a TP/XF-1250 backbone. They may not be
connected to the same physical wire.
Two IP-852 devices located in different cities could use the Internet as a high-speed
backbone to create a single L ON W ORKS network. Instead of connecting the two IP-852
devices with one long wire, the Internet is used to create a “virtual wire”. The IP-852
Configuration Server creates this virtual wire.
Home
Network A
i.LON 600
192.168.1.102
NAT
Gateway
192.168.1.1
Home
Network B
i.LON 600
10.1.1.8
NAT
Gateway
10.1.1.1
ISP A ISP B
Internet
29.1.7.65 131.23.203.17
FT Channel
FT Channel
New York London
Figure 4.6 Creating a Virtual Wire
The IP-852 Configuration Server is aware of NAT gateways, and you should enter each
NAT gateway in your system as you create your IP-852 channel (virtual wire). In Figure
4.6, the IP-852 Configuration Server could be configured as shown below.