WLC5508 版本7.6.120.0 管理AIR-CAP3502I-A-K9 AP上不了线，AP上报错如下：*Jan 10 09:51:29.000: %CAPWAP-5-DTLSREQSEND: DTLS connection request sent peer_i
p: 172.16.10.200 peer_port: 5246
*Jan 10 09:51:29.000: %CAPWAP-5-CHANGED: CAPWAP changed state to
*Jan 10 09:51:29.132: %PKI-3-CERTIFICATE_INVALID_NOT_YET_VALID: Certificate chai
n validation has failed. The certificate (SN: 2961C940000000016AB8) is not yet
valid Validity period starts on 14:28:30 UTC Jan 20 2014
*Jan 10 09:51:29.135: %LWAPP-3-CLIENTERRORLOG: Peer certificate verification fai
led
*Jan 10 09:51:29.135: %CAPWAP-3-ERRORLOG: Certificate verification failed!
*Jan 10 09:51:29.135: DTLS_CLIENT_ERROR: ../capwap/capwap_wtp_dtls.c:348 Certifi
cate verified failed!
*Jan 10 09:51:29.135: %DTLS-4-BAD_CERT: Certificate verification failed. Peer IP
: 172.16.10.200
*Jan 10 09:51:29.135: %DTLS-5-SEND_ALERT: Send FATAL : Bad certificate Alert to
172.16.10.200:5246
*Jan 10 09:51:29.135: %DTLS-3-BAD_RECORD: Erroneous record received from 172.16.
10.200: Malformed Certificate
*Jan 10 09:51:29.135: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to 172
.16.10.200:5246
把WLC5508系统时间改成当前或2010年-2013年还是一样 AP的polioies 也选了MIC 没也有用，如何排查
