ZyXEL Communications Corporation VSG1435B101 Manuel D’Utilisation

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Chapter 7 Wireless
VSG1435-B101 Series User’s Guide
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wireless station A and B can still access the wired network but cannot 
communicate with each other.
Figure 38   Basic Service set
7.9.6  MBSSID
Traditionally, you need to use different APs to configure different Basic Service 
Sets (BSSs). As well as the cost of buying extra APs, there is also the possibility of 
channel interference. The ZyXEL Device’s MBSSID (Multiple Basic Service Set 
IDentifier) function allows you to use one access point to provide several BSSs 
simultaneously. You can then assign varying QoS priorities and/or security modes 
to different SSIDs.
Wireless devices can use different BSSIDs to associate with the same AP.
7.9.6.1  Notes on Multiple BSSs
• A maximum of eight BSSs are allowed on one AP simultaneously.
• You must use different keys for different BSSs. If two wireless devices have 
different BSSIDs (they are in different BSSs), but have the same keys, they 
may hear each other’s communications (but not communicate with each other).
• MBSSID should not replace but rather be used in conjunction with 802.1x 
security.