WI-MOD-E-100 & WI-MOD-E-300 Wireless Ethernet
User Manual
WI-MOD-E Manual v1.10
Page
38
establish a link – but the MAC address is always broadcast in beacons whereas the SSID broadcast
is configurable).
Unit B in the WDS router example above has three WDS links – to units A, C, and D; we show unit
B’s configuration below. It can be seen that there are 3 entries in the WDS Connections list. The
first entry specifies a connection to the Access Point whose SSID is “A”, and that it is to be a WDS
router interface with Router IP address 169.254.0.3 (this is the address that unit B adopts for the
router interface link to unit A). Note that this IP Address specifies a different network than that of
the default interface for unit B (i.e. default interface network 192.168.0.x compared to WDS
interface network 169.254.0.x). It is a requirement that the interfaces at each end-point of a WDS
link have the same
network
address, so by using a different network address to that of the default
interface we ensure that each end point has a different network address than its default interface.
This ensures that the WDS links at either end point are not bridged with their default interface, since
in this example we wish to eliminate the overhead associated with a bridged interface.
A consequence of using a different network address for the WDS link between unit A and B, is that
we now need to configure a
routing rule
at units A and B so that the WI-MOD-E can determine
where to send traffic destined for the respective network addresses of A and B. For example, if unit
B receives traffic destined for network 192.168.0.x (i.e. somewhere on unit A’s network), the
routing rule specifies that the traffic must be forwarded to the end point of the WDS link to unit A.
