S&C Instruction Sheet 1074-530
35
SpeedNet Client Tool
IP Routing Window,
Ad Hoc Routing Tab
Figure 57. Ad Hoc Routing IP configuration window.
The
IP Routing
window provides a list of tabs that can be used to configure the routing
performance of a SpeedNet ME Radio. Selecting a tab will provide a list of configurable
options.
The
Ad Hoc Routing
tab, shown in Figure 57, is used to enable, disable, or configure
the embedded ad hoc (mesh) routing protocol. The embedded ad hoc routing protocol
is a customized version of Ad-Hoc On-Demand Distance Vector (AODV). The following
parameters can be configured:
•
Off
—Selecting the
Off
setting will disable the automated mesh networking
protocol. When disabled, static routes must be entered manually on the
Routes
tab
for all endpoints this radio needs to reach. No combination of automatic AODV rout-
ing and static routing is supported.
•
AODV
—Selecting the
AODV
setting will enable the embedded mesh networking
protocol allowing network routes to be created and maintained automatically to the
best next hop neighbor from the SpeedNet ME Radio. All radios in the network must
enable the
AODV
function to use the feature. Selecting the AODV setting is recom-
mended for ease of configuration, robustness to radios going down, and ease of add-
ing radios to the mesh. The remaining configuration options on the
Ad Hoc Routing
tab pertain specifically to the mesh networking protocol.
•
Active Route Timeout
—The Active Route Timeout parameter determines how long
a SpeedNet ME Radio should wait for an inactive data communication route to be
removed from the route table. Each time an IP packet is sent over a specific route,
a timer begins counting down. If the timer expires before another packet is sent, the
route is considered inactive and is removed from the radio’s route table. The
Ac-
tive Route Timeout
value determines the length of this timer. In SCADA polling
applications, a timeout value greater than the polling interval is recommended.
Note that a route is defined by the IP address of the two endpoints. A given pair of
SpeedNet ME Radios may have several separate routes between them—for example,
serving different devices on the radios’ Ethernet ports. As such, activity on one
route between two radios does not preserve other routes between the two radios for
traffic with different source/destination IP addresses. The value of this parameter is
measured in minutes and the recommended value is 30 minutes.
