Configuration >Wireless>Advanced
路径下可以看看Band Select和Optimized Roaming 的参与,AireOS中有一个low RSSI check,在 C9800中貌似没有找到,看文档说是在Optimized Roaming可以Check low RSSI,但是修改这个请谨慎!
Optimized roaming also prevents client association when the client's RSSI is low. This feature checks the RSSI of the incoming client against the RSSI threshold. This check prevents the clients from connecting to a Wi-Fi network unless the client has a viable connection. In many scenarios, even though clients can hear beacons and connect to a Wi-Fi network, the signal might not be strong enough to support a stable connection.