AP Status joined but obb error image download

[lisavbedt]

My ap Is joined but l got errors with obb 

AP-model ap-air2802i-b-k9 wireless controller 9800-CL 17.9.4

[*04/20/2024 19:08:59.6159] Discovery Request sent to 192.168.178.150, discovery type STATIC_CONFIG(1)
[*04/20/2024 19:08:59.6432] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
[*04/20/2024 19:08:59.6434] Discovery Response from 192.168.178.150
[*04/20/2024 19:08:59.6477] Discovery Response from 192.168.178.150
[*04/20/2024 19:09:10.0000] Started wait dtls timer (60 sec)
[*04/20/2024 19:09:10.0096]
[*04/20/2024 19:09:10.0096] CAPWAP State: DTLS Setup
[*04/20/2024 19:09:10.0343] First connect to vWLC, accept vWLC by default
[*04/20/2024 19:09:10.0343]
[*04/20/2024 19:09:10.0369] dtls_verify_server_cert: vWLC is using SSC, returning 1
[*04/20/2024 19:09:10.7297]
[*04/20/2024 19:09:10.7297] CAPWAP State: Join
[*04/20/2024 19:09:10.8308] OOBImageDnld: OOB Image Download in ap_cap_bitmask(2)
[*04/20/2024 19:09:10.8311] Sending Join request to 192.168.178.150 through port 5256, packet size 1376
[*04/20/2024 19:09:15.5037] OOBImageDnld: OOB Image Download in ap_cap_bitmask(2)
[*04/20/2024 19:09:15.5039] Sending Join request to 192.168.178.150 through port 5256, packet size 1376
[*04/20/2024 19:09:15.5348] Join Response from 192.168.178.150, packet size 1397
[*04/20/2024 19:09:15.5348] AC accepted previous sent request with result code: 0
[*04/20/2024 19:09:15.5348] Received wlcType 0, timer 30
[*04/20/2024 19:09:15.6890]
[*04/20/2024 19:09:15.6890] CAPWAP State: Image Data
[*04/20/2024 19:09:15.7112] AP image version 17.9.4.27 backup 17.9.3.154, Controller 17.9.4.27
[*04/20/2024 19:09:15.7113] Version is the same, do not need update.
[*04/20/2024 19:09:15.7562] status 'upgrade.sh: Script called with args:[NO_UPGRADE]'
[*04/20/2024 19:09:15.8175] do NO_UPGRADE, part1 is active part
[*04/20/2024 19:09:15.8327]
[*04/20/2024 19:09:15.8327] CAPWAP State: Configure
[*04/20/2024 19:09:17.3020] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: Configure(8).
[*04/20/2024 19:09:17.3100] DOT11_CFG[1]: Starting radio 1
[*04/20/2024 19:09:17.9165] DOT11_DRV[1]: Started Radio 1
[*04/20/2024 19:09:17.9171] DOT11_CFG[0]: Starting radio 0
[*04/20/2024 19:09:18.4892] DOT11_DRV[0]: Started Radio 0
[*04/20/2024 19:09:18.6581] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: Configure(8).
[*04/20/2024 19:09:18.6582] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: Configure(8).
[*04/20/2024 19:09:18.9483]
[*04/20/2024 19:09:18.9483] CAPWAP State: Run
[*04/20/2024 19:09:18.9809] AP has joined controller
[*04/20/2024 19:09:19.7884] Previous AP mode is 0, change to 0
[*04/20/2024 19:09:19.7949] Current session mode: ssh, Configured: Telnet-No, SSH-No, Console-Yes
[*04/20/2024 19:09:19.7950]
[*04/20/2024 19:09:19.7950] Current session mode: telnet, Configured: Telnet-No, SSH-No, Console-Yes
[*04/20/2024 19:09:19.7950]
[*04/20/2024 19:09:19.7952] Current session mode: console, Configured: Telnet-No, SSH-No, Console-Yes
[*04/20/2024 19:09:19.7952]
[*04/20/2024 19:09:19.8361] chpasswd: password for user changed
[*04/20/2024 19:09:19.8824] chpasswd: password for user changed
[*04/20/2024 19:09:19.9906]
[*04/20/2024 19:09:19.9906] Same LSC mode, no action needed
[*04/20/2024 19:09:20.3788] CLSM[00:00:00:00:00:00]: U3 Client RSSI Stats feature is deprecated; can no longer be enabled
[*04/20/2024 19:09:20.5462] Got WSA Server config TLVs
[*04/20/2024 19:09:21.0288] SD AVC only supports 802.11ax AP
[*04/20/2024 19:09:21.5333] AP tag change to default-policy-tag

[*04/20/2024 19:09:47.5896] set cleanair [slot0][band0] enabled
[*04/20/2024 19:09:47.5955] set cleanair [slot1][band1] enabled
[*04/20/2024 19:10:01.3149] DOT11_DRV[0]: Stopped Radio 0
[*04/20/2024 19:10:02.0830] DOT11_DRV[1]: Stopped Radio 1
[*04/20/2024 19:11:09.5650] FOUND CONFIGURED WLC (Primary) REDISCOVER TO CONNECT WITH THAT.
[*04/20/2024 19:11:09.5983] OOBImageDnld: OOBImageDownloadTimer expired for image download..
[*04/20/2024 19:11:09.5983] OOBImageDnld: Do common error handler for OOB image download..
[*04/20/2024 19:11:09.6307]
[*04/20/2024 19:11:09.6307] CAPWAP State: DTLS Teardown
[*04/20/2024 19:11:10.6977] OOBImageDnld: Do common error handler for OOB image download..
[*04/20/2024 19:11:10.7889] status 'upgrade.sh: Script called with args:[CANCEL]'
[*04/20/2024 19:11:10.8463] do CANCEL, part1 is active part
[*04/20/2024 19:11:10.8615] status 'upgrade.sh: Cleanup tmp files ...'
[*04/20/2024 19:11:10.8961] Dropping dtls packet since session is not established. Peer 192.168.178.150-5246, Local 192.168.178.88-5256, conn (nil)
[*04/20/2024 19:11:10.8962] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: DTLS Teardown(4).
[*04/20/2024 19:11:10.8963] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: DTLS Teardown(4).

[balaji.bandi]

Is this only 1 AP having issue all other AP have same issue ?

May be worth AP factory reset and test it or Manually Upgrade the image on AP and try to join

[lisavbedt]

lt did reset ap but it getting same problem and l know how upgrade ap

[balaji.bandi]

Is this only 1 AP having issue all other AP have same issue ?

[lisavbedt]

Yes l have 24 ap but getting same problem

[balaji.bandi]

If all 24 having the issue ? - did this worked before or fresh setup ? or Migration from OLD WLC to new WLC ?

check the matrix :

https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html

what is the Cat 9800 controller side Logs ?  

 l know how upgrade ap   - i take this as you manually upgraded the AP desired version and trying to join WLC (what is the outcome ?)

Do you have any other AP model on the Lan which is working with Cat 9800 ?

AP and WLC in the same LAN ?

[lisavbedt]

No ap is joined in cloud Wireless controller 9800-CL

[marce1000]

                      >...No ap is joined in cloud Wireless controller 9800-CL
  - What do you mean , because you start the post with :  AP Status joined but obb error image download

 M.

[Leo Laohoo]

Please avoid 17.9.4/17.9.4a or 17.9.5.  My reasons can be found HERE.

Downgrade to 17.6.6 or use 17.12.3.

[marce1000]

 - Make sure that the regulatory domain on the APs and controller match , look into :
           https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/218396-troubleshoot-catalyst-9800-ap-join-or-di.html
         And or https://logadvisor.cisco.com/logadvisor/wireless/9800/9800APJoin  for further troubleshooting on the issue , 

 M.

[Rich R]

You can ignore the OOBImageDnld messages - they're misleading if you're not using https image download.
In any case there is no need for the AP to download since it is already running the correct image:
"AP image version 17.9.4.27 backup 17.9.3.154, Controller 17.9.4.27"

If all your APs are affected then the problem is probably the WLC not the APs.
Check your WLC config using the Config Analyzer (link below).
Check the WLC logs.
Make sure you have the SMUs and APSP installed.
Do a radioactive trace on one of the AP MAC address and packet capture on WLC to see why the joins are failing.