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CCNA Wireless 640-722 Official Cert Guide by David Hucaby

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Intracontroller Roaming

In a CUWN, lightweight APs are bound to a wireless LAN controller through CAPWAP tunnels. The roaming process is similar to that of autonomous APs; clients must still reassociate to new APs as they move about. The only real difference is that the controller handles the roaming process because of the split-MAC architecture.

Figure 12-4 shows a two-AP scenario where both APs connect to a single controller. Client-1 is associated to AP-1, which has a Control and Provisioning of Wireless Access Points (CAPWAP) tunnel to controller WLC-1. The controller maintains a client database that contains detailed information about how to reach and support each client. For simplicity, Figure 12-4 shows the database as a list of its APs, ...

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