User's Manual

Chapter 5 Wireless
B222s User’s Guide
67
I n step 3, you add another access point (AP2 ) t o your net work. AP2 is out of range of AP1 , so you
cannot use AP1 for the WPS handshake w it h t he new access point . However, you know t hat Clie n t
2 support s t he registrar function, so you use it t o perfor m t he WPS handshake instead.
Figure 35 WPS: Exam ple Net work St ep 3
5.7.6.5 Limitations of WPS
WPS has som e lim itat ions of which you should be aware.
• WPS works in I nfrast ruct ure net works only ( where an AP and a wireless client com municate) . I t
does not work in Ad- Hoc net w orks (where there is no AP) .
• When you use WPS, it wor ks bet ween t wo devices only. You cannot enroll m ultiple devices
sim ultaneously, you m ust enroll one after the other.
For inst ance, if you have t w o enrollees and one registrar you m ust set up t he first enrollee ( by
pressing the WPS but ton on t he registrar and the first enrollee, for exam ple) , t hen check t hat it
successfully enrolled, t hen set up the second device in t he sam e way.
• WPS works only wit h other WPS-enabled devices. However, you can st ill add non-WPS devices t o
a network you already set up using WPS.
WPS works by aut om atically issuing a random ly- generat ed WPA- PSK or WPA2- PSK pre- shared
key from t he regist rar device to the enrollee devices. Whet her t he net work uses WPA-PSK or
WPA2- PSK depends on t he device. You can check t he configurat ion int erface of t he regist rar
device t o discover t he key the network is using ( if t he device support s this feat ure). Then, you
can ent er the key into t he non-WPS device and j oin t he net work as norm al (t he non-WPS device
m ust also support WPA- PSK or WPA2- PSK) .
CLIENT 1
AP1
REGISTRAR
CLIENT 2
EXISTING CONNECTION
S
E
C
U
R
I
T
Y
I
N
F
O
ENROLLEE
AP2
E
X
I
S
T
I
N
G
C
O
N
N
E
C
T
I
O
N