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WLC 2100 and LAP1131AG are disconnecting.

d-santangelo
Level 1
Level 1

‎10-11-2010 06:53 AM - edited ‎07-03-2021 07:16 PM

Since few days the WLC 2100 series controller and 3x LAP1131AG are getting disconnected and the controller gets offline via the local ip address.  At that point I have to reboot. To get anywhere and after I connect wirelessly to the AP before I know it it disconnects.  It worked for 3 years straight no fuss. And now nothing. I reconfigured the WLC 10times and no diffference.  Please logs here below and help, the following is odd and I do not know what it means: Controller is out of sync with the central timebase.  Many thanks.   

Logs

0Mon Oct 11 15:02:50 2010Rogue : 00:24:b2:2e:79:fc removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
1Mon Oct 11 15:02:50 2010Rogue : 00:22:b0:ef:3c:10 removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
2Mon Oct 11 14:59:50 2010Rogue : 00:22:b0:dc:49:2d removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
3Mon Oct 11 14:56:50 2010Rogue : 00:26:44:21:87:e3 removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
4Mon Oct 11 14:46:26 2010RF Manager updated Channel for Base Radio MAC: 00:1e:7a:a7:1c:80 and slotNo: 0. New Channel is: 1
5Mon Oct 11 14:42:49 2010Rogue AP : 00:22:b0:ef:3c:10 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -94 and SNR: -1
6Mon Oct 11 14:39:49 2010Rogue AP : 00:22:b0:dc:49:2d detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -92 and SNR: 0
7Mon Oct 11 14:38:50 2010Rogue : 00:8b:5d:8d:b4:5a removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
8Mon Oct 11 14:32:50 2010Rogue : 00:22:b0:dc:49:2d removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
9Mon Oct 11 14:29:50 2010Rogue : 00:22:b0:ef:3c:10 removed from Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g)
10Mon Oct 11 14:27:49 2010Rogue AP : 00:24:b2:2e:79:fc detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -90 and SNR: 2
11Mon Oct 11 14:18:50 2010Rogue AP : 00:8b:5d:8d:b4:5a detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -91 and SNR: 1
12Mon Oct 11 14:12:50 2010Rogue AP : 00:22:b0:dc:49:2d detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -98 and SNR: -2
13Mon Oct 11 14:09:50 2010Rogue AP : 00:26:44:21:87:e3 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -91 and SNR: 1
14Mon Oct 11 14:09:50 2010Rogue AP : 00:24:17:f2:fc:f9 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -71 and SNR: 17
15Mon Oct 11 14:09:50 2010Rogue AP : 00:22:b0:ef:3c:10 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -94 and SNR: -1
16Mon Oct 11 14:06:50 2010Rogue AP : 00:21:63:cf:f0:f9 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -82 and SNR: 10
17Mon Oct 11 14:06:50 2010Rogue AP : 00:26:5a:0d:64:98 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -73 and SNR: 21
18Mon Oct 11 14:03:50 2010Rogue AP : 00:16:e3:07:b5:d6 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -76 and SNR: 13
19Mon Oct 11 14:03:50 2010Rogue AP : 1c:bd:b9:80:7e:47 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -39 and SNR: 55
20Mon Oct 11 14:03:50 2010Rogue AP : 00:1b:9e:e2:7c:29 detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -67 and SNR: 26
21Mon Oct 11 14:03:50 2010Rogue AP : 00:1f:9f:d5:ff:dd detected on Base Radio MAC : 00:1e:7a:a7:1c:80 Interface no:0(802.11b/g) with RSSI: -68 and SNR: 29
22Mon Oct 11 13:57:50 2010AP's Interface:0(802.11b) Operation State Up: Base Radio MAC:00:1e:7a:a7:1c:80 Cause=Unknown
23Mon Oct 11 13:57:50 2010AP's Interface:1(802.11a) Operation State Up: Base Radio MAC:00:1e:7a:a7:1c:80 Cause=Unknown
24Mon Oct 11 13:57:25 2010AP's Interface:1(802.11a) Operation State Down: Base Radio MAC:00:1e:7a:a7:1c:80 Cause=Unknown
25Mon Oct 11 13:57:25 2010AP's Interface:0(802.11b) Operation State Down: Base Radio MAC:00:1e:7a:a7:1c:80 Cause=Unknown
26Mon Oct 11 13:57:24 2010AP Associated. Base Radio MAC: 00:1e:7a:a7:1c:80
27Mon Oct 11 13:56:11 2010Cold Start:
28Mon Oct 11 13:56:10 2010Temperature Sensor Hardware Failure has Occured.Can't determine the temperature.
29Mon Oct 11 13:56:10 2010Link Up: Slot: 0 Port: 1
30Mon Oct 11 13:56:06 2010Controller time base status - Controller is out of sync with the central timebase.

2 people had this problem
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0 Helpful
6 Replies 6

Tiago Antunes
Cisco Employee
Cisco Employee

‎10-12-2010 12:01 AM

Hi,

the message "Controller time base status - Controller is out of sync with the central timebase." usually means that the WLC is not able to synch with the NTP server.

Also this could be the reason for APs not being able to join the WLC.

Do you have any logs from the APs console or from the WLC console?

On the WLC console, you can enable lwapp debugs and filter by the mac address of a specific AP having trouble to join:

debug mac addr xx:xx:xx:xx:xx:xx

debug lwapp packet enable

LWAPP troubleshooting guide: http://www.cisco.com/en/US/tech/tk722/tk809/technologies_tech_note09186a00806c9e51.shtml.

Please share the debugs with us so we can take a look.

HTH,

Tiago


0 Helpful

Nicolas Darchis
Cisco Employee
Cisco Employee

‎10-12-2010 12:32 AM

The controller out of time sync can be ignored as it can be seen it happened at the same time as a reboot.

So when it boots it is out of time synch but then quickly syncrhonizes itself.

Nicolas

0 Helpful

d-santangelo
Level 1
Level 1
In response to Nicolas Darchis

‎10-12-2010 01:55 AM

Thank you guys for the responses.

What seems odd is it run for a whole day just fine I connected only 1AP for troubleshooting and then used the wifi on 2 machines all day.

At one point I decided to use my iphone on WiFi too and no later than 1 minute the AP fell from the sync with Controller.

Now that I believe is the real issue. Has anyone heard of such problem before?

Davide

0 Helpful

d-santangelo
Level 1
Level 1

‎10-19-2010 02:52 AM

Found this post somewhere on the net which it could possibly fix our problem, any idea where to find some of these  on a 2100 controller? Got the Beacon interval and the Fragmentation interval. But the rest I cannot find it there, has anyone got an idea?   Open the router setup page and under the Wireless tab,Change the Radio band to Wide-40MHz Channel,Wide Channel to 11 and Standard Chanel to 13-2.472Ghz and click on save settings..Under the Advanced Wireless Settings,Change the Beacon Interval to 75,Change the Fragmentation Threshold to 2304,Change the RTS Threshold to 2304 and Click on Save Settings...Under the Security tab,uncheck "Filter Anonymous Internet Requests" and click on save settings..Now,power cycle the network and check.

0 Helpful

Tiago Antunes
Cisco Employee
Cisco Employee
In response to d-santangelo

‎10-19-2010 02:56 AM

Hi David,

Those settings have nothing to do with the AP-WLC connectivity.

They are simply related to the Wireless clients and AP connectivity.

If you follow my previous post, maybe we can help you more.

HTH,

Tiago

--

If  this helps you and/or answers your question please mark the question as  "answered" and/or rate it, so other users can easily find it.

0 Helpful

mirajkar.mayur
Level 1
Level 1
In response to Tiago Antunes

‎01-29-2013 07:22 PM

Hi Devid, d-santangelo,

We are facing same  problem on WLC 5508 controller.

Please find below logs.

Wed Jan 30 06:56:22 2013    Controller time base status -

Controller is out of sync with the central timebase.

44    Wed Jan 30 06:56:21 2013    Cold Start:

45    Wed Jan 30 06:55:44 2013    Link Up: Slot: 0 Port: 1

46    Wed Jan 30 06:55:33 2013    A RF group member has been added on

802.11a network on controller with IP 172.16.20.10(MAC f0:f7:55:2c:03:80)

47    Wed Jan 30 06:55:33 2013    A RF group member has been added on

802.11b/g network on controller with IP 172.16.20.10(MAC f0:f7:55:2c:03:80)

48    Wed Jan 30 06:55:13 2013    Link Down: Slot: 0 Port: 8

49    Wed Jan 30 06:55:13 2013    Link Down: Slot: 0 Port: 7

50    Wed Jan 30 06:55:13 2013    Link Down: Slot: 0 Port: 6

51    Wed Jan 30 06:55:12 2013    Link Down: Slot: 0 Port: 5

52    Wed Jan 30 06:55:12 2013    Link Down: Slot: 0 Port: 1

53    Wed Jan 30 06:55:12 2013    Link Down: Slot: 0 Port: 4

54    Wed Jan 30 06:55:12 2013    Link Down: Slot: 0 Port: 1

55    Wed Jan 30 06:55:12 2013    Link Down: Slot: 0 Port: 3

56    Wed Jan 30 06:55:11 2013    Link Down: Slot: 0 Port: 2

57    Wed Jan 30 06:55:11 2013    Link Down: Slot: 0 Port: 1

Please suggest me !!!!!

0 Helpful
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