D2 W MDME 2400 Wireless Ethernet Modem
IF 1584 Rev. 1
IF 1584 Rev. 1
Page 36
As mentioned previously, configuration of the WDS router example is more complex than the
bridged example given earlier. In this case, all Access Points have different SSIDs, and none of
them have SSID broadcast disabled so that WDS configurations can be made without knowledge of
Access Point MAC addresses. If SSID broadcasts were disabled, each configuration entry would
require an SSID
and
a MAC address (this is because both SSID
and
MAC addresses are required to
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 (3) WDS links – to units A, C, and D; we show
unit B’s configuration below. It can be seen that there are three (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.
