User manual

Unified Services Router User Manual
80
4.6 Wireless distribution system (WDS)
Setup > Wireless Settings > WDS
Wireles s distribution s ys tem is a s ys tem enabling the wireles s interconnection of
acces s points in a network. This feature is only guaranteed to work only between
devices of the s ame type.
Figure 49: Wirele ss Distribution Syste m
 This feature is only guaranteed to work only between devices of the same type (i.e.
us ing the s ame chips et/driver). For example between two DSR250N boxes , or
between two DSR1000N. It s hould als o interoperate between a DSR 1000N and
DSR 500 N boxes s ince they are bas ed on the same chips et/driver.
When the user enables the WDS links us e the s ame s ecurity configuration as the
default access point. The WDS links do not have true WPA/WPA2 s upport, as in there
is no WPA key handshake performed. Instead the Ses sion Key to be us ed with a WDS
Peer is computed using a has hing function (s imilar to the one us ed for computing a
WPA PMK). The inputs to this function are a PSK (configurable by an admi nis trator
from the WDS page) and an internal "magic" s tring (non -configurable).
In effect the WDS links us e TKIP/AES encryption, depending on the encryption
configured for the default AP. In cas e the default AP us e s mixed encryption (TKIP +
AES).The WDS link will us e the AES encryption scheme.