Wifi - Roaming outage

Jose Pablo · ‎06-17-2016

Hi,

I'm doing tests with a WLC 4404 and two APs 1142 to know how this controller manage the wifi user mobility but I see that when I change of AP my smartphone lost the Internet conection during several second.

The smartphone doesn't lost the wifi signal but I lost the Internet connectivity.

Note: The APs are installed arround 10-15 between them so it not a problem with the wifi coverage.

On the WLC logs I see a reauthentication proccess when I walk from one APs to the another one (on the moment that I have the outage)

I suppose this is normal beacuse the smartphone is reconnecting to another APs but I'm not sure.

I'm looking information about that but I'm very frustate because I don't find nothing to attack the problem.

Can anybody show me the way to attack this issue?

Thanks in advance,

Francesco Molino · ‎06-17-2016

Hi

If mobility group is configured correctly, roaming will not have any impact on user traffic (no outage)

I'll paste 2 links that can help you on checking how mobility had to be configured :

http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/107188-mobility-groups-faq.html

http://www.cisco.com/c/en/us/td/docs/wireless/controller/7-0/configuration/guide/c70/c70mobil.html

After checking these documents let me know if to have further questions

Thanks

PS: Please don't forget to rate and mark as correct answer if this solved your issue

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question

George Stefanick · ‎06-17-2016

Do this remove all security and try it on an open network and see if it improves. Also what device is it ? BTW thats a very old controller...

"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
___________________________________________________________

Jose Pablo · ‎06-20-2016

Hi,

Supportlan,

Is it neccesary to configure the mobility?

I thought that options was neccesary when it's used more than one WLC.

George,

I would like to have another but at this moment it's no possible :-)

Anyway...I repeat the probe with anoter SSID with only one user connected to it (with & without security enabled) and... in this case it's work. I don't lost the connectivity anytime. Why is it possible?

The only differents that I found at this moment is....the user number connecter to the other SSID is greater. Do the user number affect to that?

Thanks,

Francesco Molino · ‎06-20-2016

Hi

Mobility is for sure with multiple wlc and I thought you had more than 1, sorry.

With only 1 wlc, impact are caused by number of users on 1 AP (how many users you have on 1 AP?)

It could be also when radio are misconfigured ( roaming value, RRM).

Did you leave default values?

Thanks

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question

Jose Pablo · ‎06-21-2016

Hi,

I have about 5 users per AP.

I didn't change nothing about the radio settings and the wlan has been created without change any option expcept the HREAP option.

I use the following option on the HREAP settings:

HREAP
H-REAP Local Switching   Enabled
H-REAP Local Auth       Enabled
Learn Client IP Address Enabled

I'm using the same setting on both wlan.

I don't understand why I can move me with one wlan and not with the other.

Jose Pablo · ‎06-21-2016

Hi,

Do you know if are there any restriction with the characters used on the PSK?

If I remove the character "&" in my key.... work!!!

I'm doing more probes to confirm that with more devices.

Regards,

Francesco Molino · ‎06-21-2016

Which version of wlc are you using?

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question

Jose Pablo · ‎06-21-2016

It's the version 7.0.235.3

Francesco Molino · ‎06-21-2016

Very version. Have you tried to upgrade to the last recommended version?

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question

Jose Pablo · ‎06-21-2016

Yes, it's a old version.

I would like to upgade but I don't have user to download it :-(

Anyway, I'll try to do it,

Do you heard something about this kind of issue before on this versions?

I'm going to do more test to confirm the fix.

Francesco Molino · ‎06-21-2016

It's been a while I'm not using this version but I had some bugs that were all addressed with version 7.6.

I can't remember is there were some issues with special characters within psk and/or flexconnect roaming issues.

I would highly recommend to upgrade before troubleshooting and maybe calling TAC case if needed

Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question

Wifi - Roaming outage

HREAP H-REAP Local Switching EnabledH-REAP Local Auth EnabledLearn Client IP Address Enabled

HREAP
H-REAP Local Switching Enabled
H-REAP Local Auth Enabled
Learn Client IP Address Enabled