S&C Instruction Sheet 1074-530
5
Network Setup
Overview
SpeedNet ME Radios serve as a communication end point for SCADA devices. They can
connect to a SpeedNet ME Radio mesh network. They can be installed in a variety of
network configurations. Plan your network in advance, and develop a logical IP addressing
scheme for your particular application. Depending on your network type, several factors
may influence your design:
• Point-to-point vs. end-point within a mesh
• Stand-alone network connection
When network topology has been determined, the SpeedNet ME Radios can be
configured appropriately.
SpeedNet ME Radios route IP data between separate Ethernet subnets to their next hop
neighbor. Data are routed between the Ethernet subnets over a common IP-based wireless
network. Route information can be entered manually, or it can be handled automatically
by Ad hoc On demand Distance Vector (AODV) routing protocol.
AODV is a routing protocol for mobile ad hoc networks and other wireless ad hoc
networks. SpeedNet ME Radios use a proprietary AODV routing system that works
dynamically to maintain message routing. It generates fewer transmissions and conserves
network capacity. In the case of SpeedNet ME Radios, AODV is limited to discovering
and establishing the best possible point-to-point link. SpeedNet ME Radios will not act as
message relays for other nodes in the network.
Prior to implementing a SpeedNet ME Radio network, you should plan the IP
addressing scheme. The use of private IP addresses is recommended when designing a
SpeedNet network. The diagram shown in Figure 2 shows a sample IP address scheme
for a simple three-node network using private IP addresses.
Ethernet Interface: 192.168.1.2
Subnet Mask:
255.255.255.0
Default gateway: 192.168.1.1
Ethernet Interface: 192.168.1.1
Subnet Mask:
255.255.255.0
Wireless Interface: 192.168.202.1
Subnet Mask:
255.255.255.0
Ethernet Interface: 192.168.3.2
Subnet Mask:
255.255.255.0
Default gateway: 192.168.3.1
Ethernet Interface: 192.168.3.1
Subnet Mask:
255.255.255.0
Wireless Interface: 192.168.202.3
Subnet Mask:
255.255.255.0
End Point Node 1
End Point Node 2
Ethernet Interface: 192.168.2.1
Subnet Mask:
255.255.255.0
Wireless Interface: 192.168.202.2
Subnet Mask:
255.255.255.0
Repeater Node
Figure 2. Multi-node SpeedNet network.
