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Member
Posts: 198
Registered: ‎04-21-2014
Kudos: 50

AP Crashing instead of limiting clients?

Morning,

 

I had the following issue yesterday. I am wondering if anyone has any advice.

 

Library Lecture Theatre

Yesterday in our Library Lecture Theatre I had a strange issue that I was hoping you could help shed some light on. I had around one hundred students in my Library Lecture Theatre who were getting their new devices.

 

At first all was fine and I had an even spread of devices across the AP’s (4 in total. 2 HD, 1 SHD, 1 EDU).

 

The students were accessing our portal and digitally signing a consent form, thing Google Forms type setup. After that they had some free time and were allowed to ‘explore their devices’. This of course lead to them all trying to access the internet. What else do 10 year old students do.

 

As this happened the wireless struggles and one of the AP’s fell over causing the clients to be stuck in limbo while that AP came back up as they weren’t informed by the AP to change. I checked the event logs, there is no indication of the clients roaming to another AP.

 

HBlock.jpeg

 

H/E Block

I also had similar issues in H Block and E Block. During handouts

 

Again it was one the kids all had their notebooks and got some free time.

 

E9.jpegHBlock.jpeg

 

Overall

 

Granted I am not an expert, but my opinion is that because we run 40MHz channels each client can get up to 400 Mbps, and they were trying to achieve that full amount… all 20-30 pre AP. Which caused the AP to be overwhelmed.

 

I know I can rate limit all students, but I would rather have the AP allow clients at a high rate and rate limit only if needed, not have the AP crash.

 

Thoughts?

 

| UEWA | eduitguy.com | father | husband | NERD! |


A UBNT Nerd who loves Education and Technology!

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Re: AP Crashing instead of limiting clients?

[ Edited ]

I'm not sure if my comments will appeal but:

 

> when any access point fails, it's clearly up to the

   client device to recognize that and attempt to

   acquire a new one. Obviously, the failed access

   point can't do that--and neither can a UniFi controller.

 

> I can't say why that access point failed; you don't

   provide a full desription. But I doubt it has to do with

   'data overload'.

 

> clearly, you need to configure rate limits for this class

   of users [WLAN]. Remember that this limit is for each 

   user--not for the aggregate. it makes no sense to permit

   one 10-year-old student to have full Internet rates. If that

    fixes your problem, all is good.     Dave


> HQ in Seacoast region New Hampshire U.S.A.
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Re: AP Crashing instead of limiting clients?

Hello @Dave-N,

 

When exactly is the UAP crashing?

Why do give everyone full bandwidth, do they need it?

 

 

Regards,

Glenn R.

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