2700 AP forever stuck downloading..
C9800 WLC is on 17.3.x software.
below are the logs. think is the MIC on the AP expired.
extracting ap3g2-k9w8-mx.153-3.JPJ9/R2.bin (15184 bytes)!!
extracting info.ver (291 bytes)
*Dec 7 03:11:22.359: Currently running a Release Image
*Dec 7 03:11:22.379: DTLS_CLIENT_ERROR: ../capwap/base_capwap/dtls/base_capwap_dtls_record.c:169 Pkt too old last_seq_num : 11109,Received sequence num: 1 distance: -11108
*Dec 7 03:11:22.383: Using SHA-2 signed certificate for image signing validation.
*Dec 7 03:11:22.451: %PKI-3-CERTIFICATE_INVALID_EXPIRED: Certificate chain validation has failed. The certificate (SN: 4E78A210000000000007) has expired. Validity period ended on 21:43:46 UTC Dec 4 2022
*Dec 7 03:11:22.451: Image signing certificate validation failed (1A).
*Dec 7 03:11:22.455: Failed to validate signature
*Dec 7 03:11:22.455: Digital Signature Failed Validation (flash:/update/ap3g2-k9w8-mx.153-3.JPJ9/final_hash)
*Dec 7 03:11:22.455: AP image integrity check FAILED
Aborting Image Download
Download image failed, notify controller!!! From:126.96.36.199 to 188.8.131.52, FailureCode:3