User manual

Page 64 915U-2 Wireless I/O
Page 64 User Manual
4.3.2 IP Routing
When a 915U-2 receives an IP frame that is destined for an IP address on a different
network, it checks to see if the network address matches one of its own interfaces (i.e.
hard-wired Ethernet, or Radio) and forwards the frame appropriately. However, if the IP
network address does not match the network address of any of its interfaces, the 915U-
2 will forward the frame to its default gateway. In this case it is assumed that the default
gateway has a valid route to the destination.
In some cases, it is not practical to have just one default gateway (i.e. routed wireless
networks with more than two 915U-2 routers. If more than one “next-hop router” is
required, the 915U-2 allows for up to 100 routing rules to be configured. A routing rule
specifies a destination network (or host) IP address and the corresponding next-hop
router that messages for the specified destination will be forwarded to (Gateway). It is
assumed that the Gateway will then deliver the data to the required destination (or
forward it on to another router that will).
Figure 38 - IP Routing
IP Routing
Name
A name to describe the routing rules (Max 32 characters).
Destination
The destination network or Host IP address. You can specify a
whole network by entering the IP range 192.168.0.0 with a
Netmask of 255.255.255.0 or specify an individual host IP
address by setting the Netmask to 255.255.255.255.
Netmask
The subnet mask for the destination network.
Interface
Choose the interface to use for the route. Selections are
Radio, Ethernet or Any – Default is Any.
Gateway
Specifies the IP address of the next-hop router for the
specified destination.
Enabled
Check this box to enable the rule. You can Uncheck the box to
disable a routing rule without needing to re-enter the
information at a later time.
Save Changes
Save changes to non-volatile memory. The module will need
to be restarted before the changes take effect.
Save Changes and
Reset.
Save settings to non-volatile memory, and reboot 915U-2.
Once the module has completed the reboot sequence, all
changes are in effect.