AP C1832I not JOIN WLC 2504

[gtstech]

I have a WLC 2504 running version 8.5.182 and AP C1832I also the same version WLC but I have a problem AP cannot join WLC 2504. Please help me.

7486.0B58.5868#[*12/10/2024 10:21:42.0000] can't find the Ip from discoveryRequest array
[*12/10/2024 10:21:42.0000]
[*12/10/2024 10:21:42.0000]
[*12/10/2024 10:21:42.0000] CAPWAP State: DTLS Setup
[*12/10/2024 10:21:42.2099] Allowing expired MIC certificate
[*12/10/2024 10:21:42.2099] Certificate Start Date: Jan 7 16:34:11 2014 GMT
[*12/10/2024 10:21:42.2099] Certificate End Date: Jan 7 16:44:11 2024 GMTem
[*12/10/2024 10:21:42.2099]
[*12/10/2024 10:21:42.2099] CAPWAP State: Join
[*12/10/2024 10:21:42.2099] Sending Join request to 192.168.3.2 through port 5248
[*12/10/2024 10:21:42.2199] Join Response from 192.168.3.2
[*12/10/2024 10:21:42.3299]
[*12/10/2024 10:21:42.3299] CAPWAP State: Image Data
[*12/10/2024 10:21:42.3799] do NO_UPGRADE, part1 is active part
[*12/10/2024 10:21:42.3799]
[*12/10/2024 10:21:42.3799] CAPWAP State: Configure
[*12/10/2024 10:21:42.3799] DOT11_CFG[0] Radio Mode is changed from Local to Local
[*12/10/2024 10:21:42.3799] DOT11_CFG[1] Radio Mode is changed from Local to Local
[*12/10/2024 10:21:45.2190] Re-Tx Count=1, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*12/10/2024 10:21:45.2190]
[*12/10/2024 10:21:48.0681] Re-Tx Count=2, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*12/10/2024 10:21:48.0681]
[*12/10/2024 10:21:50.9172] Re-Tx Count=3, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*12/10/2024 10:21:50.9172]
[*12/10/2024 10:21:53.7763] Re-Tx Count=4, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*12/10/2024 10:21:53.7763]
[*12/10/2024 10:21:56.6254] Re-Tx Count=5, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*12/10/2024 10:21:56.6254]
[*12/10/2024 10:21:59.4745] Re-Tx Count=6, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*12/10/2024 10:21:59.4745]
[*12/10/2024 10:21:59.4745] Max retransmission count exceeded, going back to DISCOVER mode.
[*12/10/2024 10:21:59.4845] GOING BACK TO DISCOVER MODE
[*12/10/2024 10:21:59.4845]
[*12/10/2024 10:21:59.4845] CAPWAP State: DTLS Teardown
[*12/10/2024 10:22:04.3430]
[*12/10/2024 10:22:04.3430] CAPWAP State: Discovery
[*12/10/2024 10:22:04.3430] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
[*12/10/2024 10:22:04.3430] Discovery Response from 192.168.3.2

[Flavio Miranda]

@gtstech 

This seems to be the problem

*12/10/2024 10:21:42.2099] Certificate End Date: Jan 7 16:44:11 2024 GMTem

Run the command

config ap cert-expiry-ignore mic enable

[MHM Cisco World · Accepted solution]

You already allow expire cert.

But you have max retransmit' check country code of AP

https://blog.router-switch.com/2013/11/a-solution-for-2504-wlc-configuration-to-different-regions-of-aps/

MHM

[gtstech]

How to know which country the AP is in?

[marce1000]

  - I would also suggest to try : config ap cert-expiry-ignore ssc enable   (so in the end use both commands including)
                                                config ap cert-expiry-ignore  mic enable

   If that does not help then disable NTP on the controlller and set the clock back in time.

  M.

[gtstech]

I tried but the problem still happens.

[Leo Laohoo]

What is the serial number of the AP?

[Rich R]

What do the AP join stats on the WLC show?

Make sure you're using the latest code version 8.5.182.12 on the WLC (link below)