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WLC with 5.2.178: AIR-AP1220-IOS-UPGRD Failed to get serial number.

Goodmorning.

I have a wireless solution with n.18 AIR-LAP1242AG-E and n.7 AIR-AP1220-IOS-UPGRD and WLC4402-25 IOS 4.1.185.0.

I run a upgrade of the wlc from 4.1.185 -> 4.2.176 ->5.2.178

The AIR-LAP1242 and only 5 AIR-AP1220-IOS-UPGR running to join the wlc but not the other two.

Below the AP debug

#######################################

User Access Verification

*Mar 6 10:42:02.056: %DTLS-5-ALERT: Received WARNING : Close notify alert from 172.21.34.21

*Mar 6 10:42:02.057: %DTLS-5-PEER_DISCONNECT: Peer 172.21.34.21 has closed connection.

*Mar 6 10:42:02.057: %DTLS-5-SEND_ALERT: Send WARNING : Close notify Alert to 172.21.34.21

*Mar 6 10:42:02.327: %CAPWAP-5-CHANGED: CAPWAP changed state to DISCOVERY

*Mar 6 10:42:02.345: Power level 0 adjusted on slot 0 for chan 13

*Mar 6 10:42:02.346: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to administratively down

*Mar 6 10:42:02.352: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up

*Mar 6 10:42:02.352: %CAPWAP-3-ERRORLOG: Could Not resolve CISCO-LWAPP-CONTROLLER

*Mar 6 10:42:02.355: %CAPWAP-3-ERRORLOG: Could Not resolve CISCO-CAPWAP-CONTROLLERwtpDecodeDiscovery Response

numOfCapwapDiscoveryResp = 0

wtpDecodeDiscovery Response numOfCapwapDiscoveryResp = 1

wtpDecodeDiscovery Response numOfCapwapDiscoveryResp = 2

*Mar 6 10:42:02.358: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset

*Mar 6 10:42:02.372: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up

*Mar 6 10:42:12.356: capwapHandleDiscoveryTimer Expired

*Mar 6 10:42:12.356: %CAPWAP-3-ERRORLOG: Go join a capwap controller

*Mar 6 10:42:12.000: %CAPWAP-5-DTLSREQSEND: DTLS connection request sent peer_ip: 172.21.34.21 peer_port: 524

6

*Mar 6 10:42:13.846: %CAPWAP-5-DTLSREQSUCC: DTLS connection created sucessfully peer_ip: 172.21.34.21 peer_po

rt: 5246

*Mar 6 10:42:13.847: %CAPWAP-3-ERRORLOG: Failed to get serial number.

*Mar 6 10:42:13.847: %CAPWAP-3-ERRORLOG: WTP Board data: Failed to get serial number.

*Mar 6 10:42:13.847: %CAPWAP-3-ERRORLOG: Join request: Failed to encode WTP Board Data message element.

*Mar 6 10:42:13.847: %CAPWAP-3-ERRORLOG: Failed to encode Join request.

*Mar 6 10:42:13.847: %CAPWAP-3-ERRORLOG: Failed to send Join request to 172.21.34.21

###########################################

and below debug of wlc with the command:

###########################################

(Cisco Controller) >debug capwap errors enable

(Cisco Controller) >*Mar 06 10:48:30.336: sshpmFreePublicKeyHandle: freeing public key

*Mar 06 12:09:05.329: Discarding non-ClientHello Handshake OR DTLS encrypted packet from 172.21.44.9:34717)si

nce DTLS session is not established

*Mar 06 12:09:05.329: Failed to process packet from 172.21.44.9:34717

*Mar 06 12:09:05.617: 00:1d:70:9c:79:60 Join Priority Processing status = 0, Incoming Ap's Priority 1, MaxLrad

s = 25, joined Aps =22

*Mar 06 12:09:05.617: Received a packet which is a (type = DISCOVERY_REQUEST) with session id 0

*Mar 06 12:09:05.618: 00:1d:70:9c:79:60 Join Priority Processing status = 0, Incoming Ap's Priority 1, MaxLrad

s = 25, joined Aps =22

*Mar 06 12:09:05.618: 00:1d:70:9c:79:60 Join Priority Processing status = 0, Incoming Ap's Priority 1, MaxLrad

s = 25, joined Aps =22

*Mar 06 12:10:14.667: Discarding non-ClientHello Handshake OR DTLS encrypted packet from 172.21.44.9:34716)si

nce DTLS session is not established

*Mar 06 12:10:14.667: Failed to process packet from 172.21.44.9:34716

*Mar 06 12:10:14.957: 00:1d:70:9c:79:60 Join Priority Processing status = 0, Incoming Ap's Priority 1, MaxLrad

s = 25, joined Aps =22

*Mar 06 12:10:14.957: Received a packet which is a (type = DISCOVERY_REQUEST) with session id 0

*Mar 06 12:10:14.957: 00:1d:70:9c:79:60 Join Priority Processing status = 0, Incoming Ap's Priority 1, MaxLrad

s = 25, joined Aps =22

###########################################

Any ideas???

Regards.

Mirko Severi.

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