topic Connectivity bounce issue on wireless in Wireless

Connectivity bounce issue on wireless

yong khang NG — Sun, 04 Jul 2021 05:24:02 GMT

Hi all,

Currently facing some wireless network connectivity issue. Problem statement is at a fix hour (11:00 am somewhere), the connected endpoint will disconnect, connectivity bounce and after a period of time (say 1-2 minutes) then automatic connecting again..

This is the supporting log i can found during the case reported hour

Coverage hole pre alarm for client[1] xx:xx:xx:xx:xx:xx on 802.11b/g interface of AP yy:yy:yy:yy:yy:yy

Hist: 0 0 0 2 15 10 14 8 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

*apfMsConnTask_7: Jul 14: %APF-3-CHECK_SUPP_RATES_FAILED: apf_utils.c:203 Could not check supported rates. Invalid Supported Rates from station . Length :0. Mobile MAC: xx:xx:xx:xx:xx:xx.

*dot11a: Jul 14 : %RRM-3-RRM_LOGMSG: rrmLrad.c:791 RRM LOG: M-WLC : Airewave Director: Unsupported tx power level selected on AP xx:xx:xx:xx:xx:xx(1) to ( 17 dBm, level 7)

Fact:

01. WLC 5508, running on code 7.2.110.0

02. AP model is AIR-cap3502I-S-K9, IOS running on 12.4(25e)JA1$

Question

01. Is there any update or relase about defect on this 7.2.110.0 code? Feel weird it happen only on every 11:00am (my timezone is +8 GMT).

or is there any setting i need to tweak?

02. please suggest, based on the above 3 statement, any effort i can further tune on the wireless connectivity?

million thanks

Noel

Connectivity bounce issue on wireless

Leo Laohoo — Sat, 14 Jul 2012 06:45:43 GMT

01.  Is there any update or relase about defect on this 7.2.110.0 code? Feel  weird it happen only on every 11:00am (my timezone is +8 GMT).

This sounds like RRM doing it's work.

Connectivity bounce issue on wireless

yong khang NG — Sat, 14 Jul 2012 06:52:59 GMT

good call leo

attach the RRM snapshot, any suggestion where to fine tune?

anywhere i can set it not to happen on production hour?

thanks

Noel

Connectivity bounce issue on wireless

Leo Laohoo — Sat, 14 Jul 2012 07:24:28 GMT

I don't have a WLC handy, check under WLAN 802.11a or 802.11b/g and look under DCA and TPC and make sure the refresh (?) is set for every 24 hours. You can test my theory by disabling this. If it is the culprit then you can turn this feature back on OUTSIDE business hours.

Re: Connectivity bounce issue on wireless

yong khang NG — Tue, 17 Jul 2012 05:45:41 GMT

Hi Leo,

Thanks for reply.

I attached the setting of DCA to review.

Just would like to know what's the impact of tuning the DCA channel assignment method to "Freeze" and "OFF".

What is the industry best practise for this case?

FYI, i am using TCP v2 in this case.

Thanks for helping,

Noel

Re: Connectivity bounce issue on wireless

Leo Laohoo — Tue, 17 Jul 2012 05:52:54 GMT

FYI, i am using TCP v2 in this case.

DON'T. Stay with v1. TPC v2 is a "new" feature and there's alot of "funny" stuffs happening.

What is the industry best practise for this case?

Enable it but you can set the interval to 24-hours.