topic Re: Unclear wireless clients behavior in Wireless

Unclear wireless clients behavior

slyfox — Mon, 05 Jul 2021 18:15:28 GMT

Hello,

we have WLC 3504 ios 8.8.120.0 + set of AIR-CAP3702I-E-K9

From time to time, clients experience problems connecting to a wireless network. Two identical twin laptops can be a meter away from the access point and on one there will be everything OK and on the other there are communication problems.

Laptops equipped with Intel AC 9560.

Event log for problem laptop attached.

Re: Unclear wireless clients behavior

Leo Laohoo — Thu, 07 Nov 2019 08:08:20 GMT

A metre away from the AP ... a 3702E.
What antenna is the 3702E using?

Re: Unclear wireless clients behavior

slyfox — Thu, 07 Nov 2019 08:35:46 GMT

Hello @Leo Laohoo I mentioned 3702I, it has an integrated antenna.

Re: Unclear wireless clients behavior

Leo Laohoo — Thu, 07 Nov 2019 08:42:34 GMT

Only these two wireless clients having problems?
What about other wireless clients? They having same problems?

Re: Unclear wireless clients behavior

slyfox — Thu, 07 Nov 2019 08:53:10 GMT

At one point, a problem can be observed with 1-2 clients, but then go through and not appear at all anywhere. Replacing a wifi adapter may help. Also moving laptop btw AP also may help.

Can AAA settings affect?

Re: Unclear wireless clients behavior

Mark Elsen — Thu, 07 Nov 2019 09:00:24 GMT

- Following your debug log(s) , you may want to feed them into the Wireless Debug Analyzer available from the link below. You may also want to have a look at the Wireless Config Analyzer - WCAE and or the Wireless Lan Config Analyzer (WLCCA). Have your configuration analyzed, check advisories and or correct errors :

https://developer.cisco.com/docs/wireless-troubleshooting-tools/#!wireless-troubleshooting-tools/wireless-troubleshooting-tools

Re: Unclear wireless clients behavior

Leo Laohoo — Thu, 07 Nov 2019 09:18:16 GMT

And what firmware are the Intel 9560 running on?

Re: Unclear wireless clients behavior

slyfox — Thu, 07 Nov 2019 09:33:10 GMT

@Leo Laohoo Intel 21.20.1.1 from 5/30/2019

Re: Unclear wireless clients behavior

Leo Laohoo — Thu, 07 Nov 2019 10:22:38 GMT

Try the latest driver, 21.50.X.

Re: Unclear wireless clients behavior

slyfox — Thu, 07 Nov 2019 10:56:04 GMT

@Leo Laohoo
didn't help

what ERRORS at event log can mean ?

Re: Unclear wireless clients behavior

Leo Laohoo — Thu, 07 Nov 2019 20:58:33 GMT

Do a "debug client <MAC ADDRESS>" and log it.
What happens, with the debug enabled, and this issue occurs?

Re: Unclear wireless clients behavior

slyfox — Mon, 11 Nov 2019 11:09:14 GMT

Hello @Leo Laohoo

debug info attached

Re: Unclear wireless clients behavior

Leo Laohoo — Mon, 11 Nov 2019 21:03:20 GMT

I've had a look and I don't see any issues with this debug.
The debug starts at "12:59:48.549" and by "12:59:48.583" the client got an IP address of "10.84.150.205".

Please expand, with more details, what issue(s) are observe when this happens?

Do the wireless clients get a yellow "!"? Did the wireless clients loose wireless network? Did the wireless clients lost access to a certain DB?

Re: Unclear wireless clients behavior

slyfox — Tue, 12 Nov 2019 06:09:18 GMT

Hello @Leo Laohoo

Client experience high level packet drops. It can begin as unexpectedly as it ends.

without any kind of OS changes, on the hotspot from the phone at the same time, there are no problems.

Re: Unclear wireless clients behavior

Leo Laohoo — Tue, 12 Nov 2019 06:57:07 GMT

Can you replicate the issue (ping drops) with, say, a smart phone?

Re: Unclear wireless clients behavior

slyfox — Tue, 12 Nov 2019 12:13:18 GMT

Hello @Leo Laohoo

No,

Re: Unclear wireless clients behavior

Leo Laohoo — Tue, 12 Nov 2019 21:04:35 GMT

So with a smartphone, the ping drops doesn't occur. Is that correct?

Re: Unclear wireless clients behavior

slyfox — Wed, 13 Nov 2019 10:39:28 GMT

mobile devices connect only to the guest network and are not the main business devices. Since I can’t repeat the problem even on a usually PC, I can’t say that there are no problems on the mobile.

A mobile device can use the GSM connection automatically if there is no connection via a wi-fi network without notifying the user.

Re: Unclear wireless clients behavior

Scott Fella — Wed, 13 Nov 2019 11:53:26 GMT

You need to test with other devices and isolate if the issue is with a device with the same NIC or not. If that is the case, then it’s a driver issue. We have seen things like that in the past and you have to wait until another version is available. If this happens to all your devices, then it’s probably an issue with the code or your configuration. Create a test ssid that is basic, open, then pSK then 802.11x and see if one works and others don’t. This way you can probably reproduce the issue and you have isolated the issue further.

Re: Unclear wireless clients behavior

Leo Laohoo — Wed, 13 Nov 2019 21:32:33 GMT

Test the smart phones with the wireless.
If the issue cannot be replicated with the smart phone, tablet or any other wireless client, then everything points to the wireless driver (just as Scott has said).