Page
39
February 2010
The routing rules for unit B are shown below (for more information on routing rules, refer to the
section “3.11 Routing Rules”).
The second WDS entry above specifies the WDS link to unit C as a WDS router interface with IP
address 169.254.5.3. As with the WDS link to unit A, we use a different IP network address than the
default interface (note that this network address 169.254.5.x is also different to that used for the
WDS link to unit A 169.254.0.x, so that these separate WDS interfaces are not internally bridged).
Also, as with the WDS link to unit A, a routing rule is added to direct traffic destined for the
network address of unit C (192.168.6.x). So, in this example, unit B has a total of three IP
addresses: 192.168.5.3 for the default interface; 169.254.0.3 for the WDS link to unit A; and
169.254.5.3 for the WDS link to unit C. Note that we choose to always use the same
host
address of
3 for unit B on all of its interfaces regardless of the network address.
The third WDS entry above specifies the WDS link to unit D. In the example unit D has the same
network address as unit B, therefore we wish to have the WDS interface link to unit D bridged with
the default interface. Because we don’t specify a router IP address for the third entry the WI-MOD-
E automatically bridges this interface with the default wireless interface.
The routing rules for unit B are shown above. The routing rule for directing traffic to unit A can be
seen to specify 192.168.0.0 as the destination address (the
network
address of unit A) – because the
last byte is zero, this refers to a route to the
network
192.168.0.x (as opposed to a route to an
individual
host
). The same rule specifies the address 169.254.0.2 as the gateway address (this is the
WDS Router IP address that unit A has been configured with for its WDS link to unit B). So, this
routing rule effectively tells the WI-MOD-E that any traffic destined for the network 192.168.0.x
should be forwarded to unit A via the WDS link. Units A and C would also require similar pairs of
routing rules to direct traffic to the network addresses at the end points of their respective WDS
links. For unit D it would suffice to simply configure unit B as its default gateway, as unit B would
then forward on any traffic destined for units A and C. Refer to section “3.11 Routing Rules” for
further information on routing rules.
