Hello all,
This problem only seems to affect one of our sites. Every once in a while, several APs would lose link to the 5508 and get stranded. The only way to fix the issue is either to power cycle, or better yet SSH into the APs and use the command "capwap ap controller ip address x.x.x.x", and then they'd automatically rejoin the controller. At first, I thought network hiccups caused the APs to lose connectivity, but there's none that I could find. I have the primary/secondary controller IPs configured in them as well. See log below:
[previous log entries show AP working as intended, then...]
*Jan 18 05:29:29.632: %CAPWAP-3-ERRORLOG: Retransmission count for packet exceeded max(CAPWAP_ECHO_REQUEST
., 1)
*Jan 18 05:29:29.632: %LWAPP-3-CLIENTEVENTLOG: Switching to Standalone mode
*Jan 18 05:29:29.645: %CAPWAP-3-ERRORLOG: GOING BACK TO DISCOVER MODE
*Jan 18 05:29:29.645: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to [ommitted due to security reason]:5246
*Jan 18 05:29:29.704: %WIDS-6-DISABLED: IDS Signature is removed and disabled.
*Jan 18 05:29:32.797: %CLEANAIR-6-STATE: Slot 0 down
*Jan 18 05:29:32.797: %CLEANAIR-6-STATE: Slot 1 down
*Jan 18 05:32:35.214: %CAPWAP-3-DHCP_RENEW: Could not discover WLC using DHCP IP. Renewing DHCP IP.
*Jan 18 05:32:38.278: %LWAPP-3-LWAPP_INTERFACE_GOT_IP_ADDRESS: Interface BVI1 obtained IP from DHCP...
*Jan 18 05:32:38.278: %CAPWAP-3-ERRORLOG: Invalid event 38 & state 2 combination.
*Jan 18 05:32:38.379: %DHCP-6-ADDRESS_ASSIGN: Interface BVI1 assigned DHCP address 10.100.1.20, mask 255.255.255.0, hostname AP020
*Jan 18 05:32:38.379: %LWAPP-3-LWAPP_INTERFACE_GOT_IP_ADDRESS: Interface BVI1 obtained IP from DHCP...
*Jan 18 05:32:46.215: %CAPWAP-3-ERRORLOG: Did not get log server settings from DHCP.
*Jan 18 05:35:41.753: %CAPWAP-3-DHCP_RENEW: Could not discover WLC using DHCP IP. Renewing DHCP IP.
*Jan 18 05:35:44.817: %LWAPP-3-LWAPP_INTERFACE_GOT_IP_ADDRESS: Interface BVI1 obtained IP from DHCP...
*Jan 18 05:35:44.817: %CAPWAP-3-ERRORLOG: Invalid event 38 & state 2 combination.
*Jan 18 05:35:44.898: %DHCP-6-ADDRESS_ASSIGN: Interface BVI1 assigned DHCP address 10.100.1.20, mask 255.255.255.0, hostname AP020
*Jan 18 05:35:44.898: %LWAPP-3-LWAPP_INTERFACE_GOT_IP_ADDRESS: Interface BVI1 obtained IP from DHCP...
*Jan 18 05:35:52.753: %CAPWAP-3-ERRORLOG: Did not get log server settings from DHCP.
*Jan 18 05:38:48.260: %CAPWAP-3-DHCP_RENEW: Could not discover WLC using DHCP IP. Renewing DHCP IP.
*Jan 18 05:38:51.324: %LWAPP-3-LWAPP_INTERFACE_GOT_IP_ADDRESS: Interface BVI1 obtained IP from DHCP...
*Jan 18 05:38:51.324: %CAPWAP-3-ERRORLOG: Invalid event 38 & state 2 combination.
*Jan 18 05:38:51.405: %DHCP-6-ADDRESS_ASSIGN: Interface BVI1 assigned DHCP address 10.100.1.20, mask 255.255.255.0, hostname AP020
[These log messages keep looping endlessly]
These APs discover the controller by using DHCP + DNS. Any suggestion will be greatly appreciated!
Thanks,
Wil
