Symptom: A lightweight AP fails to join its WLC, although it can ping the WLC. The AP console shows the following errors:
*Oct 28 23:27:36.057: %CAPWAP-3-ERRORLOG: Go join a capwap controller *Oct 28 23:27:38.000: %CAPWAP-5-DTLSREQSEND: DTLS connection request sent peer_ip: 192.168.200.30 peer_port: 5246 *Oct 28 23:27:38.123: DTLS_CLIENT_ERROR: ../capwap/base_capwap/dtls/base_capwap_dtls_handshake.c:90 First fragment for seq 2 is missing *Oct 28 23:27:38.124: DTLS_CLIENT_ERROR: ../capwap/base_capwap/dtls/base_capwap_dtls_handshake.c:90 First fragment for seq 2 is missing *Oct 28 23:28:08.119: DTLS_CLIENT_ERROR: ../capwap/base_capwap/dtls/base_capwap_dtls_connection_db.c:2134 Max retransmission count reached! *Oct 28 23:28:37.999: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to 192.168.200.30:5246
Conditions: The IPv4 path between the WLC and the AP has an MTU of less than 576 (for example, 500.)
Workaround: Redesign the network path between the AP and the WLC to have an MTU of at least 576.
Further Problem Description: The CUWN design standard is to support lightweight APs joining via a network path of 500 bytes.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
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I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...