ZyXEL Communications PLA-450 - V3.60, Руководство пользователя

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Chapter 6 Wireless LAN
PLA450 User’s Guide
62
Figure 29 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 .
6.3.1 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
The adjacent access points should use different radio channels when their coverage areas
overlap.
3
All access points must use the same port number to relay roaming information.
4 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.
6.4 Quality of Service
This section discusses the Quality of Service (QoS) features available on the PLA450.
X
AP 1
Y Y
AP 2