Allied Telesis AT-TQ Series, User Manual, Page: 75 / 174

AT-TQ Wireless Access Point Series User’s Guide
75
Encryption
Here are the available encryption settings for a WDS bridge:
 No encryption
 Static WEP
 WPA Personal
The available encryption modes for a WDS bridge vary depending on the
radio mode and VAP security. The possible settings are listed in Table 8
on page 75. For example, if you want to use WPA Personal on a WDS
bridge, you have to set VAP0 to either WPA Personal or WPA Enterprise.
Dynamic
Frequency
Selection
Dynamic frequency selection (DFS) is an industry standard that defines
how wireless access points are to respond to the presence of radar signals
on 5 GHz channels. The standard states that a wireless access point that
detects radar signals on its current 5 GHz channel has to stop transmitting
and select another channel to avoid interfering with the signals.
The wireless access points support DFS on 5 GHz channels that countries
or regions have designated as DFS channels. If an access point detects a
radar signal on its current 5 GHz channel and if the channel is designated
as a DFS channel, it immediately marks the channel as unusable for a
minimum of thirty minutes and randomly selects another channel with
which to communicate with its clients.
If a wireless access point is using a DFS 5 GHz channel for a WDS bridge
and it detects radar signals, it randomly selects another channel so as not
to interfere with the signals. This action, however, renders the bridge non-
functional.
You can prevent this from occurring by selecting a non-DFS 5 GHz
channel as the communication link between the wireless access points of
a WDS bridge. Here are three examples of non-DFS channels:
 36 - 5180 MHz
 40 - 5200 MHz
Table 8. Available Encryption Settings on WDS Bridges
Radio Mode VAP0 Security Level
Available WDS Bridge
Encryption
non-802.11n None, static WEP, or
802.1x None or Static WEP
non-802.11n WPA Personal or WPA
Enterprise None, Static WEP, or WPA
Personal
802.11n mode None None
802.11n mode WPA Personal or WPA
Enterprise None or WPA Personal