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New Member
Posts: 8
Registered: ‎05-14-2018
Kudos: 1

Increase Wireless anomalies

I have seen a huge increase in these messages since moving, and I have experienced some problems with some devices as well over the past few days. Apart from being unable to remove interference (other SSID, APs, etc) is there anything else I can do to resolve this issue?

Anomalies over 7 devices
4:00pm
High TCP latency for Client sonytvfor last 2 hours
4:00pm
Low bandwidth for Client sonytvfor last 2 hours
4:00pm
High WiFi retries for Client NestCamera
4:00pm
High TCP latency for Client Pixelfor last 2 hours
4:00pm
High WiFi retries for Client RPifor last 2 hours
4:00pm
High WiFi retries for Client sonytvfor last 2 hours
4:00pm
Low bandwidth for Client RPifor last 2 hours
3:00pm
Access Point ap.1 rejected some MAC address
3:00pm
High WiFi retries for Client Pixel
1:00pm
High WiFi retries for Client NestCamera
1:00pm
High TCP latency for Client Pixel
1:00pm
High WiFi retries for Client RPifor last 3 hours
1:00pm
Low bandwidth for Client RPifor last 3 hours
1:00pm
High WiFi retries for Client Pixel
1:00pm
Low bandwidth for Client Pixel
1:00pm
Low signal strength for Client Pixel
12:00pm
High WiFi retries for Client sonytv
12:00pm
Low bandwidth for Client NestCamerafor last 2 hours
12:00pm
Access Point ap.1 rejected some MAC address
12:00pm
High WiFi retries for Client Google-Home
11:00am
High WiFi retries for Client NestCamera
11:00am
High TCP latency for Client Pixelfor last 2 hours
11:00am
High TCP latency for Client NestCamera
9:00am
High TCP latency for Client NestCamera
8:00am
Access Point ap.1 rejected some MAC address
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SuperUser
Posts: 42,297
Registered: ‎06-23-2009
Kudos: 8636
Solutions: 1448

Re: Increase Wireless anomalies

[ Edited ]

Taken as a batch, these seem to imply high interference.

So it's probably not 'apart from'...that's what you should

focus on. That may mean more access points closer to

client devices or changing channels or bands.   Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
New Member
Posts: 8
Registered: ‎05-14-2018
Kudos: 1

Re: Increase Wireless anomalies

Unfortunately, putting APs closer to the client devices is not an option, not for any other reason other than the clients are all within 20 feet of the AP. This is in a single bedroom apartment.

I have tried changing bands from 1, 11, 6, and 9, and leaving it on AUTO.

Unfortunately, none of this has helped remedy the situation.
SuperUser
Posts: 42,297
Registered: ‎06-23-2009
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Re: Increase Wireless anomalies

[ Edited ]

You should not be using the 2.4GHz band in a heavily

populated area. Change to 5GHz for all devices or

live with the interference.

 

In any case, you should do a site scan to verify that

the issues are due to interference.    Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Member
Posts: 125
Registered: ‎05-29-2015
Kudos: 13
Solutions: 7

Re: Increase Wireless anomalies

1. I would make sure your APs are updated.
2. I would do a site scan to determine which channels are not being used.
3. I would recommend that you change the channels if possible to ones not being used to prevent interference.
4. I would turn on band steering or make another SSID for the 5Ghz and apply that SSID to the 5Ghz radio.
5. I would move all devices that you could over to the 5Ghz SSID.

Cheers...
New Member
Posts: 8
Registered: ‎05-14-2018
Kudos: 1

Re: Increase Wireless anomalies

I have attached an RF Analysis I did several days ago. 

 

As far as moving everything off of 2.4 GHz, I have done so and will take some time to see if that changes things. Unfortunately, two devices don't operate on the 5 GHz spectrum which is mildly annoying.

 

I have Band Steering enabled for 5GHz already. 

5GHzRF.PNG
24GHzRF.PNG
Member
Posts: 242
Registered: ‎08-07-2018
Kudos: 57
Solutions: 3

Re: Increase Wireless anomalies

I will take the counter on making sure your APs are up to date. Try rolling back a few revs on the FW. I found 3.9.19 resolved all of the anomalies that I was seeing. Not sure if this corrects them or they are not being identified in this firmware but my console is clean now. 

SuperUser
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Re: Increase Wireless anomalies

Those scans show a fairly high utilization of all the

available 2.4GHz channels. They seem to show

that somebody is being piggish and using 40MHz

channel width in this band.

 

There's only so much you can do when the band

is loaded up. You can add more access points and

assure that one is fairly close to each of the clients.

You can consider upgrading those 2.4GHz clients.   Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Member
Posts: 242
Registered: ‎08-07-2018
Kudos: 57
Solutions: 3

Re: Increase Wireless anomalies

The challenge most will have is that 2.4GHz clients are often IoT devices, upgrading them may not be an option.

Regular Member
Posts: 464
Registered: ‎09-28-2017
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Solutions: 33

Re: Increase Wireless anomalies

@hylon Try using channel 11 to minimize the contention with channel 5 @ HT40.  Open the 5G to VHT40.  Even though channel 38 has a little higher usage than 52, I would try it just to get away from the DFS band.  What are your power settings?  Try setting the 2G radio to Low and the 5G to Med.  Too much power is just as bad as not enough.  Adjust and test, rinse and repeat to find the sweet spot.

Senior Member
Posts: 2,770
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Re: Increase Wireless anomalies

It is a bit of a pain, but you can set up separate SSIDs for 2.4 and 5.

SuperUser
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Re: Increase Wireless anomalies

I don't see how using a particular channel ['11'] will do

anything to reduce contention--when every single 20MHz

and 40MHz 2.4GHz channel is heavily loaded.

 

For UniFi, the 5GHz band is set to VHT40 by default.   Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Regular Member
Posts: 464
Registered: ‎09-28-2017
Kudos: 129
Solutions: 33

Re: Increase Wireless anomalies

[ Edited ]

@Dave-D Take a look at the scans again, I think you may have missed that the displayed channel in use is 52 @ VHT20; a 20 Mhz channel, not 52 @ VHT40 (52+56); channel 54, a 40 Mhz channel.  What something defaults to is one thing, what it's set to is another.  As for the 2G contention, let him try it, he just might like it!  If he has to use a 2G channel, which is more likely to work better for him 1, 6, 9 or 11?  Test, rinse, repeat.  

SuperUser
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Re: Increase Wireless anomalies

[ Edited ]

Sometimes it helps to search for a more clear channel.

But the small differences you mention aren't likely to

have a major effect on the overall system. Of course

he's welcome to experiment, but not to expect much here.

 

You suggested to use VHT40 channels on 5GHz; that is

the default setting for UniFi access points--not a change.

 

For the 2.4GHz band, the scan speaks for itself--a bit

more than 'test, rinse, repeat'--whatever that means.

There are only three clear 20MHz channels on this

band: 1, 6 and 11; channel 9 is not one of them.   Dave

 


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
Regular Member
Posts: 464
Registered: ‎09-28-2017
Kudos: 129
Solutions: 33

Re: Increase Wireless anomalies

[ Edited ]

"Sometimes it helps to search for a more clear channel"

 

It always helps to look for the clearest channel.  When have you found that it doesn't?

 

"You suggested to use VHT40 channels on 5GHz; that is the default setting for UniFi access points--not a change"

 

Dave, take a look at the scan.  He is clearly using VHT20.  It doesn't matter what it defaults to, he has clearly set it to VHT20.  Are you trying to tell me what is set in the configuration doesn't matter?  I'm certainly always interested in learning something new.

 

"There are only three clear 20MHz channels on this band: 1, 6 and 11; channel 9 is not one of them."

 

Yeah... that may be why I suggested he choose the channel I did.  Using the scan above, which would you set your system to if you had to use a 2G channel?

SuperUser
Posts: 42,297
Registered: ‎06-23-2009
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Re: Increase Wireless anomalies

[ Edited ]

Sorry, I won't take part in a debate.  Dave


> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
     UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
UBNT.NH@gmail.com
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