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Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
59
Rev Version 2.19
Each modem has a different SSID. This is done to limit broadcast traffic and to route data only were it needs to go.
Site B has two virtual client WDS links configured—one to Site A’s access point, and one to Site C’s access point.
Figure 60 shows the WDS connections at Site B.
Figure 60 Site B WDS Connections
• The first entry configures a virtual WDS client connection from Site B to the access point at Site A. The SSID
is the same as Site A and the router IP address is 192.168.0.3, which is on the same subnet. Encryption is not
inherited from the main page. Therefore, if the encryption method and keys are left blank the WDS link will be
open. This example shows the encryption method and keys as being different, but they can be the same or
take on the same method and key as the main wireless interface.
• The second entry configures another virtual WDS client connection, but this time to the access point of Site C.
Again, the SSID is the same as the access point and the router IP is on the same subnet as the access point.
In addition to adding these WDS connections, Sites C and D will need a default gateway address configured so
that the module can determine where to send traffic destined for the other networks. In addition, because Site A
does not know how to get to networks 192.168.5.0 and 192.168.6.0, it requires rules to confirm the routing paths.
A default gateway and one routing rule could be configured, but it is easier to configure two routing rules as shown
in the example in Figure 61.
Figure 61 Site A Routing Rules
• The first routing rule specifies 192.168.5.0 as the destination with a netmask of 255.255.255.0, (network
address range of Site B). Because the last byte of the destination IP is zero, this refers to the network
(192.168.5.1 – 192.168.5.254), as opposed to an individual host IP. The same rule specifies the address
192.168.0.3 as the gateway address. The routing rule effectively tells the 245U-E that any traffic destined for
the network 192.168.5.X should be forwarded to Site B via WDS link address 192.168.0.3.
• The second routing rule is similar except the destinations IP address range is 192.168.6.0 with a Netmask of
255.255.255.0, indicating all traffic for the 192.168.6.X network will be routed through the WDS link address
192.168.0.4. This is the WDS router IP address that Site C has been configured with for its WDS link to Site A.
For more information on routing rules, refer to the “3.18 Routing.”
Unit C and D require some sort of routing rule that will determine how they communicate to networks outside
of their configuration. Similar routing rules as shown above could be configured to direct traffic to these other
networks. However, if only one routing path is required a default gateway address can be configured on the
Network page.
