ap上线后经常掉线 通过再ap上抓取报文发现 keepalive 问题 报文如下
11/21/2019 10:28:25.3299] CAPWAP State: Discovery
[*11/21/2019 10:28:25.3299] Discovery Request sent to 10.177.1.50, disc type STATIC_CONFIG(1)
[*11/21/2019 10:28:25.3399] Discovery Request sent to 221.4.37.33, disc type STATIC_CONFIG(1)
[*11/21/2019 10:28:55.3799] Discovery Request sent to 10.177.1.50, disc)
[*11/21/2019 10:28:55.3899] Discovery Request sent to 221.4.37.33, disc)
[*11/21/2019 10:28:55.5499] Discovery Request sent to 255.255.255.255,
[*11/21/2019 10:28:55.5499] Discovery Response from 221.4.37.33
[*11/21/2019 10:29:25.0000] Discovery Response from 192.168.11.126
[*11/21/2019 10:29:25.0000]
[*11/21/2019 10:29:25.0000] CAPWAP State: DTLS Setup
[*11/21/2019 10:29:25.0000] Discarding msg CAPWAP_WTP_EVENT_REQUEST(typ Setup(3).
[*11/21/2019 10:29:25.6899] spamLoadCertificates: LSC Root Certificate
[*11/21/2019 10:29:25.6899]
[*11/21/2019 10:29:26.0199] dtls_crypto_read_cert_pem_file: Error openie.cert
[*11/21/2019 10:29:26.1799] spamGetLradCertificate: Use MIC device cert
[*11/21/2019 10:29:26.1799]
[*11/21/2019 10:29:26.1799] dtls_crypto_read_priv_key_pem_file: Error okey
[*11/21/2019 10:29:26.1799] spamGetLradPrivateKey: Use MIC device cert
[*11/21/2019 10:29:26.1799]
[*11/21/2019 10:29:26.4899]
[*11/21/2019 10:29:26.4899] CAPWAP State: Join
[*11/21/2019 10:29:26.4899] Sending Join request to 221.4.37.33 through
[*11/21/2019 10:29:26.5999] Join Response from 221.4.37.33
[*11/21/2019 10:29:26.7499]
[*11/21/2019 10:29:26.7499] CAPWAP State: Image Data
[*11/21/2019 10:29:26.8399] do NO_UPGRADE, part2 is active part
[*11/21/2019 10:29:26.8399]
[*11/21/2019 10:29:26.8399] CAPWAP State: Configure
[*11/21/2019 10:29:26.8499] NO-ENC-PROVIDER for DOT11R_WLC_MAC_IP_PAYLO
[*11/21/2019 10:29:27.3599] DOT11_DRV[0]: Start Radio0
[*11/21/2019 10:29:27.3699] DOT11_DRV[1]: Start Radio1
[*11/21/2019 10:29:27.3999] DOT11_DRV[0]: Stop Radio0
[*11/21/2019 10:29:27.3999] DOT11_DRV[0]: Start Radio0
[*11/21/2019 10:29:27.5899] DOT11_DRV[1]: Stop Radio1
[*11/21/2019 10:29:27.5899] DOT11_DRV[1]: Start Radio1
[*11/21/2019 10:29:27.5899] DOT11_DRV[1]: Stop Radio1
[*11/21/2019 10:29:27.5899] DOT11_DRV[1]: Start Radio1
[*11/21/2019 10:29:27.7299] Discarding msg CAPWAP_WTP_EVENT_REQUEST(typigure(8).
[*11/21/2019 10:29:27.7299] Discarding msg CAPWAP_WTP_EVENT_REQUEST(typigure(8).
[*11/21/2019 10:29:27.7299] Discarding msg CAPWAP_WTP_EVENT_REQUEST(typigure(8).
[*11/21/2019 10:29:27.7299] Discarding msg CAPWAP_WTP_EVENT_REQUEST(typigure(8).
[*11/21/2019 10:29:27.7299] Discarding msg CAPWAP_WTP_EVENT_REQUEST(typigure(8).
[*11/21/2019 10:29:30.7399] DOT11_DRV[0]: Stop Radio0
[*11/21/2019 10:29:30.7499] DOT11_DRV[0]: Start Radio0
[*11/21/2019 10:29:30.7799] DOT11_DRV[1]: Stop Radio1
[*11/21/2019 10:29:30.7799] DOT11_DRV[1]: Start Radio1
[*11/21/2019 10:29:30.7799] DOT11_DRV[1]: Stop Radio1
[*11/21/2019 10:29:30.7799] DOT11_DRV[1]: Start Radio1
[*11/21/2019 10:29:31.0499]
[*11/21/2019 10:29:31.0499] CAPWAP State: Run
[*11/21/2019 10:29:31.2099] AP has joined controller admin
en[*11/21/2019 10:30:28.3099] Warning, unencrypted data keepalive failed
[*11/21/2019 10:30:28.3099] Failed to receive data keepalive
[*11/21/2019 10:30:28.3099]
[*11/21/2019 10:30:28.3099] Lost connection to the controller, going to restart CAPWAP...
[*11/21/2019 10:30:28.3099]
[*11/21/2019 10:30:28.3099] Restarting CAPWAP State Machine.
[*11/21/2019 10:30:28.3099] DOT11_DRV[0]: Stop Radio0
[*11/21/2019 10:30:28.3099] DOT11_DRV[1]: Stop Radio1
[*11/21/2019 10:30:28.3199] dtls_send_Alert: Sending FATAL : Close notify Alert
[*11/21/2019 10:30:28.4799]
[*11/21/2019 10:30:28.4799] CAPWAP State: DTLS Teardown
[*11/21/2019 10:30:28.4999] Dropping dtls packet since session is not established. Peer 221.4.37.33-5246, Local 192.168.11.101-5272, conn (nil)
[*11/21/2019 10:30:28.4999] Dropping dtls packet since session is not established. Peer 221.4.37.33-5246, Local 192.168.11.101-5272, conn (nil)
[*11/21/2019 10:30:28.4999] Discarding msg CAPWAP_CHANGE_STATE_EVENT_REQUEST(type 11) in CAPWAP state: DTLS Teardown(4).
[*11/21/2019 10:30:28.4999] Discarding msg CAPWAP_CHANGE_STATE_EVENT_REQUEST(type 11) in CAPWAP state: DTLS Teardown(4).
[*11/21/2019 10:30:33.2499]
[*11/21/2019 10:30:33.2499] CAPWAP State: Discovery
这种问题怎么解决，望各位大神指点指点
