ZyXEL Communications NBG334W - Manual (Page 78)

Chapter 5 Wireless LAN
NBG334W User’s Guide
78
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.
5.3.1 Requirements for Roaming
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.
5.4 Quality of Service
This section discusses the Quality of Service (QoS) features available on the NBG334W.