Weird behavior in wireless

[Jogh]

Hi,

I am not sure if I have placed this question in the correct entity. But we are experiencing a weird behavior in our wireless network.

We have a WLC in HA AP-SSO setup with 1602i and 2602i Access Points. We have 2 SSIDs, 1 for guest and the other for corporate users. Guests use PSK authentication while Corp users use 802.1x authentication with NPS as RADIUS server.

The issue that occurs several times is that there are instances that users could not connect to either guest SSID, corporate SSID, and worse, sometimes both SSIDs. Our temporary solution is to reboot the APs and everything is fine again.

What we have noticed is that this occurs to APs with a long uptime. I know that this shouldn't be happening even if the APs are up for more than a year.

Hope you could help us here.

Thanks!
Jogh

[Leo Laohoo]

Post the complete output to the command "sh sysinfo".

[Jogh]

Here you go

(hqwlc01) >show sysinfo

Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.0.120.0
Bootloader Version............................... 1.0.18
Field Recovery Image Version..................... 7.6.95.16
Firmware Version................................. FPGA 1.7, Env 1.8, USB console 2.2
Build Type....................................... DATA + WPS

System Name...................................... HQWLC01
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1069
Redundancy Mode.................................. SSO
IP Address....................................... 172.21.0.10
IPv6 Address..................................... ::
Last Reset....................................... Software reset
System Up Time................................... 17 days 0 hrs 41 mins 54 secs
System Timezone Location......................... (GMT +8:00) HongKong, Bejing, Chongquing
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180

Configured Country............................... PH  - Philippines
Operating Environment............................ Commercial (0 to 40 C)
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +42 C
External Temperature............................. +27 C
Fan Status....................................... OK

State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 5
Number of Active Clients......................... 2250

Burned-in MAC Address............................ 3C:08:F6:C9:E4:60
Power Supply 1................................... Present, OK
Power Supply 2................................... Present, OK
Maximum number of APs supported.................. 500
System Nas-Id.................................... HQWLC01
WLC MIC Certificate Types........................ SHA1

[Leo Laohoo]

When this event happens, do the APs get a valid IP address? 

How do you reboot the APs?  Via the GUI of the controllers or turning PoE off and then on?

[Jogh]

Hi Leo,

Yes, APs acquire IP address from DHCP via option 43.

We reboot APs via WLC GUI.

Jogh

[Jogh]

Hi Leo,

For the meantime, we just created a script for the APs to be rebooted manually every 2 weeks. After applying a reboot on all APs over the weekend, we are not experiencing issues this week so far. Would still be looking for a permanent workaround on this.

Should we open a TAC case already?

Thank you,

Jogh