why some APs would register with Secondary WLC while they are configured to Primary WLC

Ahmed Ayaad · ‎06-03-2014

Dears,

I faced strange behavior i have two WLC one primary and the other one secondary.

some AP join to secondary WLC for short period (2 min or less) and returned to primary, while they are configured to primary WLC.

Two WLC image version: 7.4.121.0

Wait your replies plz.

Thanks,

Sandeep Choudhary · ‎06-03-2014

Hi,

From which controller AP will join it is depends on our configuration on each WLC: The AP can be configured to recognize its primary and secondary controller name.

Wireless > Access Points > All APs > Select AP > High Availability Configuration

Change the primary wlc ip and name to 2nd wlc ip address/name , then check again.

More info about failover:

http://rscciew.wordpress.com/2014/01/22/ap-failover/

Regards

Dont forget to rate helpful posts

Ahmed Ayaad · ‎06-03-2014

Thanks for your reply,

Already i configured HA Configuration on all AP, and working well.

but i mean there are some AP leave primary controller and join Secondary for 2 min approximately and returned again to Primary WLC. While these AP previously configured with HA Configuration.

Plz give me your feedback.

Thanks

Sandeep Choudhary · ‎06-03-2014

means AP are loosing connection with primary wlc thats the only reson to join 2nd WLC.

Regards

Ahmed Ayaad · ‎06-03-2014

Thanks for your support.

Please can you clarify why APs loosing connection with Primary WLC however it's up and joined on it more than 300 AP in different sites.

For Clarification AP join on Secondary WLC and fallback to Primary within 2 minutes approximately.

Wait your feedback please,

Thanks,

Ahmed Ayaad · ‎06-03-2014

Thanks for your support,

Please Can you clarify why AP Loosing the connection with primary WLC however its up and joined on it more than 300 AP from different sites.

and for clarification after AP joined the secondary WLC fallback to Primary with in 2 minutes.

Wait your feedback Please.

Thanks,

Sandeep Choudhary · ‎06-03-2014

Can you paste logs from wlc and AP console. Then we can find out the root cause.

Regards

Ahmed Ayaad · ‎06-03-2014

please find Logs from Secondary WLC. and i can't get Access point logs cause i Remote site.

465 Tue Jun 3 13:20:36 2014 AP '90068-02', MAC: 34:a8:4e:bb:08:90 disassociated previously due to Link Failure. Uptime: 0 days, 18 h 46 m 25 s . Reason: Capwap WTP Event request.
466 Tue Jun 3 13:20:36 2014 AP on the 802.11a radio with Base Radio MAC 34:a8:4e:bb:08:90 (90068-02) is unable to associate. The regulatory domain configured on it '-E' does not match the controller's regulatory domain: -C

493 Tue Jun 3 13:16:59 2014 AP '90068-02', MAC: 34:a8:4e:bb:08:90 disassociated previously due to Link Failure. Uptime: 0 days, 18 h 42 m 55 s . Reason: Capwap WTP Event request.
494 Tue Jun 3 13:16:59 2014 AP on the 802.11a radio with Base Radio MAC 34:a8:4e:bb:08:90 (90068-02) is unable to associate. The regulatory domain configured on it '-E' does not match the controller's regulatory domain: -C

59 Tue Jun 3 13:20:42 2014 AP '90068-01', MAC: 34:a8:4e:bb:06:30 disassociated previously due to Link Failure. Uptime: 0 days, 18 h 47 m 17 s . Reason: Capwap WTP Event request.
460 Tue Jun 3 13:20:42 2014 AP on the 802.11a radio with Base Radio MAC 34:a8:4e:bb:06:30 (90068-01) is unable to associate. The regulatory domain configured on it '-E' does not match the controller's regulatory domain: -C

0   Tue Jun 3 14:51:09 2014   Coverage hole pre alarm for client[1] 94:01:c2:82:26:27 on 802.11b/g interface of AP 54:78:1a:88:2c:c0 (90002-01). Hist: 0 0 1 1 4 8 26 30 22 24 12 21 9 7 3 7 2 2 1 1 0 0 0 0 0 0 0 0 0 0 0
1   Tue Jun 3 14:51:09 2014   Coverage hole pre alarm for client[1] 88:32:9b:5f:e7:91 on 802.11b/g interface of AP 54:78:1a:88:2c:c0 (90002-01). Hist: 1 4 7 15 4 9 4 4 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2   Tue Jun 3 14:51:09 2014   Coverage hole pre alarm for client[1] cc:3a:61:69:d9:4c on 802.11b/g interface of AP 54:78:1a:88:2c:c0 (90002-01). Hist: 0 0 0 0 0 2 13 16 19 13 5 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3   Tue Jun 3 14:51:09 2014   Coverage hole pre alarm for client[1] bc:44:86:09:f1:ec on 802.11b/g interface of AP 54:78:1a:88:2c:c0 (90002-01). Hist: 0 0 0 3 21 24 13 6 2 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 2 3 0 0

Wait your feedback plz.

Thanks,

Ahmed Ayaad · ‎06-03-2014

Sorry for inconvenience.

i can get Logs from AP. please find attached.

Sandeep Choudhary · ‎06-03-2014

How to change country on WLC:

By CLI

Before you can change the country code of a WLC, you must disable the 802.11a and 802.11b network :

config 802.11a disable network

config 802.11b disable network

Now you can change the country code of the controller. In this case we change it from CN to FR (France)

config country FR

then enable again the both networks

config 802.11a enable network

config 802.11b enable network

By GUI:

First disable both network 802.11a and 802.11b

Follow these steps to disable the 802.11a and 802.11b/g networks as follows:

Choose Wireless> 802.11a/n > Network.
Unselect the 802.11a Network Status check box.
Click Apply to commit your changes.
Choose Wireless > 802.11b/g/n > Network.
Unselect the 802.11b/g Network Status check box.
Click Apply to commit your changes.

Change country code on WLC now:

Choose Wireless > Country

Regards

Sandeep Choudhary · ‎06-03-2014

Can you check these:

Tue Jun 3 13:16:59 2014 AP on the 802.11a radio with Base Radio MAC 34:a8:4e:bb:08:90 (90068-02) is unable to associate. The regulatory domain configured on it '-E' does not match the controller's regulatory domain: -C.

Both AP and WLC must match the reulatery domain.

Paste output from AP: sh version

Paste from WLC: sh sysinfo

Regards

Ahmed Ayaad · ‎06-03-2014

Plz find attached files

Sh ver --> AP

sh sysinfo --> 2 WLC

For clarification we have this log also

Tue Jun 3 13:20:36 2014 AP '90068-02', MAC: 34:a8:4e:bb:08:90 disassociated previously due to Link Failure. Uptime: 0 days, 18 h 46 m 25 s . Reason: Capwap WTP Event request.

If this mean the AP loosing connectivity due to network/routing issue ?

or as example AP send CAPWAP message and didn't receive response from Primary WLC so join on secondary and once get the response from primary returned and join to it.

Wait your feedback plz,

Thanks,

Sandeep Choudhary · ‎06-03-2014

Hi,

As per your logs:

1st wlc have country code france.

(WiSM-slot2-1) >show sysinfo 
System Name...................................... RMS-WLC1
Configured Country............................... FR  - France

2nd wlc have country code China.

(WiSM-slot2-1) >show sysinfo 
System Name...................................... UTO-WLC1
Configured Country............................... CN  - China

and your AP only can be used for europe domain:

AIR-CAP1602I-E-K9

So it can work with china domain. You must change the country code on your UTO-WLC1.

Regards

Dont forget to rate helpful posts

Ahmed Ayaad · ‎06-03-2014

Thanks for your reply,

OK i agree with you about country coded. but this not related to AP joined on Secondary and Quickly fallback to primary again.

wait your feedback.

Sandeep Choudhary · ‎06-03-2014

I am not sure about this. But give a try and change country first and test it again. It may helps and then we can go ahead with troubleshooting.

Regards