06-15-2022 11:01 AM
Hello I am having an issue with a wireless controller Catalyst model 9800 L-F and access point model C9115AXI-B. The APs are able to join the WLC but after 2 minutes or so, they will drop, start blinking green, red, and off and then rejoin the WLC. It does this every 2 minutes or so. When it is joined, I am able to connect to the AP with another device, the light will turn solid blue, device will pull an IP address and get wifi but it will still drop and rejoin every few minutes.
WLC and APs are running version 17.3.4c
Also, is it possible to use Aruba access points with this model of WLC?
Solved! Go to Solution.
06-15-2022 02:48 PM
The WLC 9800 uses WNCD instances for AP association, if a WNCD instance is overloaded it could start dropping the APs, it seems that Cisco has worked on that kind of issue and fixed it on the 17.3.5a release:
You should go to that code to discard any issue triggered by WLC's performance.
regarding your second question, you could only use Cisco APs with your Cisco WLC, so you cant connect Aruba APs to the WLC 9800. To see the list of supported APs, check the Cisco Wireless Solutions Software Compatibility Matrix:
https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html
Kind regards.
06-15-2022 11:10 AM
Looks for me is the AP is in correct region, and any cert issue, what is the Logs show on the Controller ?
also verify the config as mentioned in cisco document :
06-15-2022 04:50 PM
below is what I see in syslog in the troubleshooting tool on GUI. I am still new to networking and configuring so will try to verify if I have the right config.
Jun 16 00:38:51.724: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxx[5279] Mac: xxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:38:32.803: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxx[5266] Mac: xxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:38:17.332: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxx, MAC: xxxxxxxxx Joined
Jun 16 00:37:51.165: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxxx[5265] Mac: xxxxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:36:59.122: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxxxxxx, MAC: xxxxxxxxx Joined
Jun 16 00:36:40.144: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxxxxxx, MAC: xxxxxxxxxx Joined
Jun 16 00:36:32.969: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxxxx[5279] Mac: xxxxxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:36:14.247: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxxxx Mac: xxxxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:35:58.569: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxxxxx, MAC: xxxxxxxxxxxxxxx Joined
Jun 16 00:35:32.434: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxxxx[5265] Mac: xxxxxxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:34:40.374: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxxxxxxx, MAC: xxxxxxxxxxxxxx Joined
Jun 16 00:34:21.592: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxxxxxxxx, MAC: xxxxxxxxxxxx Joined
Jun 16 00:34:14.220: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxxxxx[5279] Mac: xxxxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:33:55.703: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: Session-IP: xxxxxxxxxxx[5266] Mac: xxxxxxxxxxx CAPWAP DTLS session closed for AP, cause: DTLS server session shutdown
Jun 16 00:33:39.848: %CAPWAPAC_SMGR_TRACE_MESSAGE-5-AP_JOIN_DISJOIN: Chassis 1 R0/0: wncd: AP Event: AP Name: xxxxxxxxx, MAC: xxxxxxxx Joined
n
Log Buffer (4096 bytes):
Logging Source-Interface: VRF Name:
Trap logging: level informational, 21528 message lines logged
No active filter modules.
Persistent logging: disabled
Count and timestamp logging messages: disabled
Exception Logging: size (4096 bytes)
filtering disabled
Buffer logging: level debugging, 21533 messages logged, xml disabled,
filtering disabled
Monitor logging: level debugging, 0 messages logged, xml disabled,
filtering disabled
Console logging: level debugging, 21390 messages logged, xml disabled,
No Inactive Message Discriminator.
No Active Message Discriminator.
Syslog logging: enabled (0 messages dropped, 3 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)
06-15-2022 11:43 AM
Hi
"Also, is it possible to use Aruba access points with this model of WLC? "
No. Mix vendor is impossible.
"Hello I am having an issue with a wireless controller Catalyst model 9800 L-F and access point model C9115AXI-B. The APs are able to join the WLC but after 2 minutes or so, they will drop, start blinking green, red, and off and then rejoin the WLC. It does this every 2 minutes or so. When it is joined, I am able to connect to the AP with another device, the light will turn solid blue, device will pull an IP address and get wifi but it will still drop and rejoin every few minutes. "
I see two possibility here:
= bug
=link problem
06-15-2022 02:48 PM
The WLC 9800 uses WNCD instances for AP association, if a WNCD instance is overloaded it could start dropping the APs, it seems that Cisco has worked on that kind of issue and fixed it on the 17.3.5a release:
You should go to that code to discard any issue triggered by WLC's performance.
regarding your second question, you could only use Cisco APs with your Cisco WLC, so you cant connect Aruba APs to the WLC 9800. To see the list of supported APs, check the Cisco Wireless Solutions Software Compatibility Matrix:
https://www.cisco.com/c/en/us/td/docs/wireless/compatibility/matrix/compatibility-matrix.html
Kind regards.
06-15-2022 11:21 PM
- Review the 9800 L-F configuration with the CLI command : show tech wireless , have the output analyzed by https://cway.cisco.com/tools/WirelessAnalyzer/ , please note do not use classical show tech-support (short version) , use the command denoted in green for Wireless Analyzer
M.
06-19-2022 04:13 AM
Thank you all for the speedy replies! I ended up updating the firmware to 17.3.5 and that got the APs to stay connected. @marce1000 the wirelessanalyzer tool was useful. I didn't know about it before. Thanks again everyone!
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