
User Manual
XYR301E Wireless Ethernet
34-XY-25-41
Page 61
3.11.4 Example – WDS Routed Network
An example of using WDS router interfaces to achieve a similar physical topology to the WDS bridge example
discussed earlier is illustrated below.
In both examples, there are four WDS Access points each with the possibility of having their own client/stations
associated. In both examples A, B, C, and D can all exchange data with each other. The bridged example has the
advantage of redundancy but at the expense of extra overhead. The routed example below cannot provide the
redundancy of the bridged example, and requires more configuration effort, but does not have the overhead of using the
bridge Spanning Tree Protocol, so is suited to fixed installations that do not require redundancy.
As mentioned previously, configuration of the WDS router example is more complex than the bridged example given
earlier. Each Modem and each link have a different SSID. This is done to limit broadcast traffic and to route data only
were it needs to go.
Site B in the WDS router example above has three WDS links – to Site A, C, and D; we show Site 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 “SSID_AA”, and that it is to be a
Virtual Station interface with a separate Router IP address of 169.254.0.3 (this is the address that Site B
adopts for the link to Site A). Note that this IP Address specifies a different network than that of the default
interface for Site A or B (i.e. default interfaces 192.168.0.X and 192.168.X respectively). It is a requirement
that the virtual interfaces at each end-point of a WDS link have the same network structure; this ensures that
the WDS links at either end point are not bridged with their default interface.
A consequence of using a different network address for the WDS link between Sites A and B, is that we now
need to configure a
routing rule
at both Site A & B so that the XYR301-E can determine where to send traffic
destined for the respective network addresses of A and B. For example, if Site B receives traffic destined for
network 192.168.0.x (i.e. somewhere on Site A’s network), the routing rule specifies that the traffic must be
forwarded to the end point of the WDS link to Site A. The routing rules for Site B are shown below (for more
information on routing rules, refer to the section 3.17 “Routing Rules”).
LAN
Access Point
192.168.0.2
SSID = SSID_A
Access Point
192.168.5.5
SSID = SSID_D
Access Point
192.168.5.3
SSID = SSID_B
Virtual AP
SSID = SSID_AA
169.254.0.2
Virtual Client
SSID = SSID_AA
169.254.0.3
WDS
Rou
ter 1
69.2
54.0
.X
WDS Bridge
Site A
Site B
Site D
Access Point
192.168.6.4
SSID = SSID_C
Site C
WDS Routed
Network
Virtual Client
SSID = SSID_B
192.168.0.X
SSID_A
Virtual AP
SSID = SSID_B
Virtual AP
SSID = SSID_BB
169.254.5.3
Virtual Client
SSID = SSID_BB
169.254.5.4
LAN
192.168.6.X
SSID_C
LAN
192.168.5.X
SSID_D
Virtual AP
SSID = SSID_CC
169.254.6.2
WD
S Ro
ut
e
r
16
9.2
5
4
.5.
X
Virtual Client
SSID = SSID_CC
169.254.6.4
W
D
S R
ou
te
r 1
69
.25
4.6
.X
LAN
192.168.6.X
SSID_B
Virtual AP
Virtual Station
Содержание XYR301E
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