Ubiquity UNify UAP problem with link flapping

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?

Thanks.
LVL 1
cef_soothsayerAsked:
Who is Participating?
 
masnrockCommented:
I'm wondering if it's something about the switch or the controller. Could you put a small switch on the side and see what happens? But also, are you noticing anything in the UniFi controller itself?
0
 
masnrockCommented:
What type of switch do you have, and is everything with it up to date?
0
 
cef_soothsayerAuthor Commented:
Firmware & controller software on UAPs has been updated.
Switches are manageable HP Smart Stack 2810a-48G
Have already tried different ports.
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

 
cef_soothsayerAuthor Commented:
>> Could you put a small switch on the side and see what happens?

Already recommended that the other day.  Client is remote, and is buying a small workgroup switch to try it with.

>>But also, are you noticing anything in the UniFi controller itself?

Nope.  Eerily calm.
0
 
masnrockCommented:
Just writing to see if you've heard anything from the client.
0
 
cef_soothsayerAuthor Commented:
Nothing yet.  Expect to talk with him today.
0
 
masnrockCommented:
Hopefully at least most of those APs are still under warranty. I'd be going after Ubiquiti assuming using the other switch doesn't help.
0
 
cef_soothsayerAuthor Commented:
We put the UAP APs on a small 8 port work-group class gigabit switch and then connected the work-group switch to the  HP stack in the original port that the AP was in. (unmanageable work-group switch is set to auto obviously)

Works Great.  No more dropped packets.  No more lost connections.

Client is looking at replacing the six HP stack 48 port manageable switches on the upcoming annual budget, as the HPs are almost 10 years old anyway.

Thanks.
0
 
cef_soothsayerAuthor Commented:
Just a band-aid solution, but found the issue.
0
 
masnrockCommented:
Great to hear that helped your issue dramatically. You might be able to get the client to even look into a switch that can power the APs, which would cut out the need for injectors if that's what you're using.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.