ZyXEL nbg-334w Guia Do Utilizador

Chapter 5 Wireless LAN

NBG334W User’s Guide

Figure 34   Roaming Example

The steps below describe the roaming process.

1 Wireless station Y moves from the coverage area of access point AP 1 to that of access 

point AP 2. 

2 Wireless station Y scans and detects the signal of access point AP 2. 
3 Wireless station Y sends an association request to access point AP 2.
4 Access point AP 2 acknowledges the presence of wireless station Y and relays this 

information to access point AP 1 through the wired LAN. 

5 Access point AP 1 updates the new position of wireless station Y.

The following requirements must be met in order for wireless stations to roam between the 
coverage areas. 

1 All the access points must be on the same subnet and configured with the same ESSID. 
2 If IEEE 802.1x user authentication is enabled and to be done locally on the access point, 

the new access point must have the user profile for the wireless station.

3 The adjacent access points should use different radio channels when their coverage areas 

overlap. 

4 All access points must use the same port number to relay roaming information. 
5 The access points must be connected to the Ethernet and be able to get IP addresses from 

a DHCP server if using dynamic IP address assignment. 

This section discusses the Quality of Service (QoS) features available on the NBG334W.