Cisco1852i wifi that joins the controller and then disconnect

[quang-nv]

I have a Cisco 1852i wifi that joins the controller and then disconnects.

We have a new 1852i AP joining another 1852i AP running ME.
When show ap join stats summary all the status shows Joined but on the controller dashboard it doesn't show any information (ip address and up time) and it disconnects after a while.

Has anyone experienced this?

I think there is a problem with the image download as shown below

--More-- [*08/01/2024 08:38:49.0544] Image download did not start for 120 seconds.

[*08/01/2024 08:38:49.0544]

[*08/01/2024 08:38:49.0544] Going to restart CAPWAP (reason : image download cannot start)...

[*08/01/2024 08:38:49.0544]

[*08/01/2024 08:38:49.0644] Invalid event 50 & state 10 combination.

[*08/01/2024 08:38:49.0644] SM handler: Failed to process timer message. Event 50, state 10

[*08/01/2024 08:38:49.0644] Failed to handle timer message.

[*08/01/2024 08:38:49.0644] FSM failure while processing message with id: 1

[*08/01/2024 08:38:49.0644] Restarting CAPWAP State Machine.

[*08/01/2024 08:38:49.0644] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: Image Data(10).

[*08/01/2024 08:38:49.0644]

[*08/01/2024 08:38:49.0644] CAPWAP State: DTLS Teardown

[*08/01/2024 08:38:49.0743] Dropping dtls packet since session is not established. Peer 172.168.1.250-5246, Local 172.168.1.198-5272, conn (nil)

[Flavio Miranda · Accepted solution]

Hi @quang-nv 

 Take a look on the image version on the AP and on the WLC and make sure they have similar version. One reason I can imagine for this problem is if the AP and the WLC have different versions.

[marce1000 · Accepted solution]

  - Checkout : https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-2/b_Mobility_Express_Deployment_guide/b_Mobility_Express_Deployment_guide_chapter_01010.html

 M.

[MHM Cisco World]

5272 <<- this Port is not common ? are AP behind NAT ? if Yes you need to forwarding two ports 5246/5247

MHM

[Rich R · Accepted solution]

@quang-nv The link Marce provided has the answer.  You either need to pre-install the correct software image version on the AP yourself or provide a TFTP server where the AP can download the image from, and on the ME WLC configure the TFTP server details which ME will send to the AP so that it knows where to get the image from.

ME does not store the AP images for download like a normal WLC.

[quang-nv · Accepted solution]

After uploading slave AP to ME image matching Master AP version everything worked fine.

Thanks again everyone.