Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

5508 WLC with 1142 Waps: Access points randomly dropping out

Hello,

I am experiencing an issue where seemingly random access points are dropping off from the controller. They are receiving poe via brocade switching and the team has already worked extensively with Brocade to rule out the switching, poe values on individual ports, and available power on the switch as potential causes.

This is an AIR-CT5508-K9 controller running 7.4.100.0 with AIR-LAP1142N-A-K9 access points on the same firmware. There are 31 access points (License for 50) total and they are all on the same network / physical location as the controller.

The controller system log (under show tech-support) is filled with the following:

#DOT1X-3-INVALID_REPLAY_CTR: 1x_eapkey.c:360 Invalid replay counter from client (followed by MAC of client machines)

#DHCP-3-BIND_SRPORT_ERR: dhcp_support.c:373 Binding service port failed.

The WAPs are showing (Monitor > Statisitcs > Select WAP that isn't joined:

There is mismatch between the Requests Received and Responses Sent are different; in this case Received is 12 and sent is 4.

Last error Summary:

Last AP Connection Failure: Number of message retransmission to the AP has reached maximum

Last AP Disconnect Reason: AP's DTLS timer expired

Last Error Occurred Reason: AP got or has been disconnected

Last Error Occurred Reason: Number of message retransmission to the AP has reached maximum

I can provide more information as needed but this point I would like to find a more definitive troubleshooting direction instead of supplying more logs.

Thanks in advance

1 REPLY
VIP Purple

Re: 5508 WLC with 1142 Waps: Access points randomly dropping out

Hi Peter,

This is a bug of this 7.4.100.0 software code. Please upgrade it to 7.4.110.0 (7.4MR1) to fix it. Also make sure your 5508 FUS upgraded (1.7.0.0) as well. Refer this for that & keep in mind this will take 30-40 min downtime to your wireless.

http://www.cisco.com/en/US/docs/wireless/controller/release/notes/fus_rn_1_7_0_0.html

Here is the bug details

CSCud97983:1040/1140 crashing after upgrading to 7.4.100.0

Symptom: 1040/1140 AP crashing /disassociating from wlc once a day

Conditions:unknown

Workaround: Reboot the AP

Known Fixed Releases:(4)

7.4(100.1)

7.4(100.60)

15.2(2)JB2

7.4(110.0)

HTH

Rasika

**** Pls rate all useful responses ****

526
Views
0
Helpful
1
Replies
CreatePlease login to create content