Requirements For Roaming; Figure 5-11 Roaming Example - ZyXEL Communications ZyAir Access Point Series User Manual

The steps below describe the roaming process.
Step 1. As wireless station Y moves from the coverage area of access point AP 1 to that of access point
AP 2, it scans and uses the signal of access point AP 2.
Step 2.
Access point AP 2 acknowledges the presence of wireless station Y and relays this information
to access point AP 1 through the wired LAN.
Step 3.
Access point AP 1 updates the new position of wireless station.
Step 4. Wireless station Y sends a request to access point AP 2 for reauthentication.

5.5.1 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.
System Screens

Figure 5-11 Roaming Example

ZyAIR Access Point Series User's Guide
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