AP 9120 AXI cannot join WLC9800-L-F

[judicaelguei]

hello dear

i have issue AP 9120  AXE connect and disconnect to WLC 9800

from the AP

[*08/30/2022 14:48:39.1611] CAPWAP State: Discovery
[*08/30/2022 14:48:39.1621] IP DNS query for CISCO-CAPWAP-CONTROLLER.IARD.CI.SANLAM.COM
[*08/30/2022 14:48:39.1631] DNS resolved CISCO-CAPWAP-CONTROLLER.IARD.CI.SANLAM.COM
[*08/30/2022 14:48:39.1631] DNS discover IP addr: 192.168.224.253
[*08/30/2022 14:48:39.1641] Discovery Request sent to 192.168.224.253, discovery type DNS(3)
[*08/30/2022 14:48:39.1711] Discovery Request sent to 255.255.255.255, discovery type UNKNOWN(0)
[*08/30/2022 14:48:39.1711] Discovery Response from 192.168.224.253
[*08/30/2022 14:48:39.1741] Discovery Response from 192.168.224.253
[*08/30/2022 14:52:23.0000]
[*08/30/2022 14:52:23.0000] CAPWAP State: DTLS Setup
[*08/30/2022 14:52:23.3780]
[*08/30/2022 14:52:23.3780] CAPWAP State: Join
[*08/30/2022 14:52:23.3950] Sending Join request to 192.168.224.253 through port 5254
[*08/30/2022 14:52:23.3990] Join Response from 192.168.224.253
[*08/30/2022 14:52:23.3990] AC accepted join request with result code: 0
[*08/30/2022 14:52:23.4070] Received wlcType 0, timer 30
[*08/30/2022 14:52:23.4490]
[*08/30/2022 14:52:23.4490] CAPWAP State: Image Data
[*08/30/2022 14:52:23.4500] AP image version 17.3.3.26 backup 8.10.130.0, Controller 17.3.3.26
[*08/30/2022 14:52:23.4500] Version is the same, do not need update.
[*08/30/2022 14:52:23.4740] upgrade.sh: Script called with args:[NO_UPGRADE]
[*08/30/2022 14:52:23.5140] do NO_UPGRADE, part2 is active part
[*08/30/2022 14:52:23.5190]
[*08/30/2022 14:52:23.5190] CAPWAP State: Configure
[*08/30/2022 14:52:23.5260] capwapd: reading file /click/nss_lag_control/lacp_state: No such file or directory
[*08/30/2022 14:52:23.5260] capwapd: reading file /click/nss_lag_control/capwap_state: No such file or directory
[*08/30/2022 14:52:26.4200] Re-Tx Count=1, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*08/30/2022 14:52:26.4200]
[*08/30/2022 14:52:29.2700] Re-Tx Count=2, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*08/30/2022 14:52:29.2700]
[*08/30/2022 14:52:32.1210] Re-Tx Count=3, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*08/30/2022 14:52:32.1210]
[*08/30/2022 14:52:34.9720] Re-Tx Count=4, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*08/30/2022 14:52:34.9720]
[*08/30/2022 14:52:35.0820] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: Configure(8).
[*08/30/2022 14:52:37.8230] Re-Tx Count=5, Max Re-Tx Value=5, SendSeqNum=1, NumofPendingMsgs=1
[*08/30/2022 14:52:37.8230]
[*08/30/2022 14:52:40.6740] Max retransmission count exceeded, going back to DISCOVER mode.
[*08/30/2022 14:52:40.6740] Dropping msg CAPWAP_CONFIGURATION_STATUS, type = 4, len = 2746, eleLen = 2754, sendSeqNum = 1
[*08/30/2022 14:52:40.6740] GOING BACK TO DISCOVER MODE
[*08/30/2022 14:52:40.6900]
[*08/30/2022 14:52:40.6900] CAPWAP State: DTLS Teardown
[*08/30/2022 14:52:40.7470] upgrade.sh: Script called with args:[ABORT]
[*08/30/2022 14:52:40.7870] do ABORT, part2 is active part
[*08/30/2022 14:52:40.8030] upgrade.sh: Cleanup tmp files ...
[*08/30/2022 14:52:40.8250] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: DTLS Teardown(4).
[*08/30/2022 14:52:40.8250] Discarding msg CAPWAP_WTP_EVENT_REQUEST(type 9) in CAPWAP state: DTLS Teardown(4).

[marce1000]

   -  Review the current WLC9800-L-F  configuration with the CLI command : show  tech wireless , have the output analyzed by  https://cway.cisco.com/tools/WirelessAnalyzer/  , please note do not use classical show tech-support (short version) , use the command denoted in green for Wireless Analyzer. Check all advisories and or correct critical ones (if any)

 M.

[Rich R]

17.3.3.26 = Cisco IOS XE Amsterdam 17.3.3 - plenty of known bugs.

Start off by updating to 17.3.5b as per https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/214749-tac-recommended-ios-xe-builds-for-wirele.html#anc14 then see if you still have the same problem.

Debugs and packet captures on WLC to see why the CAPWAP connection is timing out.

[Arshad Safrulla]

Does it join the WLC when the AP is placed on the same VLAN as WLC WMI or when the WMI IP is manually configured in the AP itself?

Make sure that the WMI interface is defined on the WLC and NTP is synced. Also check if there is any firewalls in the path that it is not dropping any traffic.

[judicaelguei]

Hello Dears,

Thank you for your support,

it was just a country code which did not match beetween AP and WLC

Best Regard

[alberto.sanchez2]

Hello,

I just have the same issue with same AP models C9120AX and controller C9800-CL version 17.6.4

Finally, It was resolved by restarting the WLC.

Regards.