Ubiquity UNify UAP problem with link flapping
Posted on 2016-10-17
We have a customer that has a number of Ubiquity Unify UAP WIFI APs installed. They are all experiencing the same issue. The laptops stay connected to the WIFI and signal strength is strong. But they are dropping their RDP and Client/Server sessions intermittently. Ping tests show that the latency comes and goes in waves (sometimes 9ms, sometimes 400ms) and it is dropping packets (15%). Then it will be good for a few minutes, then bad again.
Looking at the switch, the port is set to Auto. The connection speed is 100 half duplex. Setting the switch port to 100 Full does not help. In fact, the problem gets a little worse.
We took a laptop, disabled WIFI, and plugged it in hardwire to the port that the AP is on, and the laptop preformed flawlessly.
We took the AP and plugged it into another switch port, and the problems continued.
This problem seemed to start about several weeks after upgrading the controller software and unit firmware to the latest versions. But because it didn't start happening immediately, I'm dubious as to that being the cause. And I've heard that downgrading firmware on these can easily brick the unit.
Anyone have a better idea before we warm up the Kiln?