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Beginner

ap fails to join WLC [dtls_disconnect: ERROR shutting down]

Hi.

ap fails to join WLC

 

WLC : 5508

AP : 2802

 

Ping is no problem.

WLC time is my current time.
The time between WLC and AP seems to be different, but does it matter?

I will attach AP and WLC logs.

What is the problem ??

 

-AP LOG-

May 9 04:49:16 kernel: [*05/09/2020 04:49:16.0551] CAPWAP State: Discovery
May 9 04:49:16 kernel: [*05/09/2020 04:49:16.0574] Discovery Request sent to 172.20.201.9, discovery type STATIC_CONFIG(1)
May 9 04:49:16 kernel: [*05/09/2020 04:49:16.0595] Discovery Request sent to 172.20.201.9, discovery type STATIC_CONFIG(1)
May 9 04:49:16 kernel: [*05/09/2020 04:49:16.0612] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
May 9 04:49:16 kernel: [*05/09/2020 04:49:16.0619] Discovery Response from 172.20.201.9
May 9 04:49:16 kernel: [*05/09/2020 04:49:16.0705] Discovery Response from 172.20.201.9
May 9 04:49:26 kernel: [*05/09/2020 04:49:26.0000]
May 9 04:49:26 kernel: [*05/09/2020 04:49:26.0000] CAPWAP State: DTLS Setup
May 9 04:50:23 kernel: [*05/09/2020 04:50:23.0133] dtls_disconnect: ERROR shutting down dtls connection ...

2 ACCEPTED SOLUTIONS

Accepted Solutions
Highlighted
Hall of Fame Community Legend

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

AP Running Image     : 8.3.150.0
Primary Boot Image   : 8.3.150.0
Backup Boot Image    : 8.3.143.0

Ok, so this AP has joined a controller in the past.  

Do this command on the AP: 

capwap ap erase all

See if this works.

View solution in original post

Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

Hi.
There was NAC appliance on site.
We allowed AP IP and everything is normal.
Thanks for your interest in my question.

View solution in original post

11 REPLIES 11
Highlighted
Hall of Fame Community Legend

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

May  9 04:56:26 kernel: [*05/09/2020 04:56:26.6105] CAPWAP State: Discovery
May  9 04:56:26 kernel: [*05/09/2020 04:56:26.6162] Discovery Request sent to 172.20.201.9, discovery type STATIC_CONFIG(1)
May  9 04:56:26 kernel: [*05/09/2020 04:56:26.6176] Discovery Request sent to 172.20.201.9, discovery type STATIC_CONFIG(1)
May  9 04:56:26 kernel: [*05/09/2020 04:56:26.6196] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)

Check firewall. 

Logs in the AP shows the AP sending out join request to the controller, however, there is no response from the WLC.

Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

Thank you for answer.
But it doesn't go through the firewall.
Highlighted
Hall of Fame Community Legend

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

Can the AP ping the WLC IP address?

Post the complete output to the following WLC command: 

show ap join stats detailed <AP NAME>

NOTE:   Put the output in a TEXT file (instead of an XLS).

Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

WLC and AP can be ping.
The APs is not joined to the WLC, so cannot perform the command you request.
Highlighted
Hall of Fame Community Legend

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]


@Snika wrote:
so cannot perform the command you request.

I don't care. 

Enter the command in the WLC and post the complete output.  

Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

(Cisco Controller) >show ap join stats detailed C4B2.39F7.2A02
No join information found for AP: c4:b2:39:f7:2a:02

Highlighted
Hall of Fame Community Legend

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

Good.
This means something is blocking the AP's Join Request from reaching the controller.
What happens if the AP and the WLC in the same VLAN?
Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

WLC and AP are not the same vlan.
However, other APs that were installed in the past are already joined to WLC.
However, only two APs installed today are not joining.
One good news is that one of the two unjoined APs succeeded in joining.
One does not know why the join succeeded.
Highlighted
Hall of Fame Community Legend

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

AP Running Image     : 8.3.150.0
Primary Boot Image   : 8.3.150.0
Backup Boot Image    : 8.3.143.0

Ok, so this AP has joined a controller in the past.  

Do this command on the AP: 

capwap ap erase all

See if this works.

View solution in original post

Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

Hi.
There was NAC appliance on site.
We allowed AP IP and everything is normal.
Thanks for your interest in my question.

View solution in original post

Highlighted
Beginner

Re: ap fails to join WLC [dtls_disconnect: ERROR shutting down]

The remaining APs that failed to join were also joined.
Since the discovery was repeated with 200.9 and 201.9, it was joined after AP Reset.
Cause not found T_T