wlc 5508&3802&2802 5g interference

[willwillwang]

Recently, my wireless network interference is very serious, and the problem occurs in 5g. What may be the cause? How can I track 5g interference

[Leo Laohoo]

Go to the site and verify the co-channel interference. 

If verified, find out what is causing it.

If this is happening in 5 Ghz: 

1.  Find out the channel(s) affecting

2.  Channel Utilization (CU) level

3.  How often is this CCI happening?

[willwillwang]

i can't find effecting beacuse i don't know what is it.

cu like this picture.

it is happen in work time.

[Leo Laohoo]

Near this AP, are there any motion sensors?

[willwillwang]

i don't setting sensors near by this ap  

i think nobody to setting sensor in there after i go to find some rogue device

[Leo Laohoo]

---

@willwillwang wrote:

i don't setting sensors near by this ap  

i think nobody to setting sensor in there after i go to find some rogue device

---

Are you, presently, at the site?

[willwillwang]

yes  

[Leo Laohoo]

Do you have the 24-hour CU graph of the place? 

Is the CCI stronger near the window or near the centre of the floor?

What is the 5 Ghz set for 20-, 40-, 80- or 160 Mhz channel bond?

[willwillwang]

24hour graph

near center

20ghz

[Leo Laohoo]

If that is the CU then very low values from midnight to around 9am.  Is this correct?

Can you check what channels are affected?

What channels are enabled on the WLC?

[willwillwang]

10.1-10.7 is Holiday 

I will check it when I back workroom

[willwillwang]

i see the CU  rate less than 10% in the holiday（10.1--10.7）

The affected channel is irregular

i use 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161 channels