Cisco APs Randomly Reboots - Page 3

B A · ‎10-15-2019

Hello.

This is what happens. Recently we replaced and connected 45 new AIR-AP1852I-E-K9 APs to non-PoE switches. However, we used TP-Link Power adapter to power all APs so WLC showed "PoE/Medium Power". To solve this we bought Cisco PWRINJ6 power injectors and replaced all TP-Links and as a result, WLC showed "Power Injector/Full Power". All radios were fully working and we were satisfied.

However, since that time three access points randomly reboot (3-5 times a day) and after a reboot they switch from "Full Power" to "Medium Power". There is no patter when they reboot. All 45 APs have the same firmware version.

What we did: we changed a power cable to an injector, we changed the injector twice, we changed a patch cord between the injector and a switch, we used a different port on a switch, we tested the cable between the AP and the injector... all is ok, we checked the configuration of these APs on WLC, we also changed the AP. But still no joy. No matter what we change, three APs reboot.

1. Why just three APs reboot? 2. Why do they switch to Medium Power?

Any Cisco expert here?

Thanks for any help.

B A · ‎10-22-2019

I checked logs again (after the reboot) and this is what I got:

(Cisco Controller) >show msglog
*spamApTask7: Oct 22 10:58:50.051: %CAPWAP-3-DTLS_CLOSED_ERR: [PA]capwap_ac_sm.c:7095 75:c5:c5:55:75:e5: DTLS connection closed forAP 192:168:1:32 (5256), Controller: 192:168:1:2 (5246) Normal Termination
*spamApTask7: Oct 22 10:56:11.290: %CAPWAP-3-DTLS_CON_CLOSED: [PA]capwap_ac_dtls.c:149 Not sending DTLS session closed notification to CAPWAP for AP 75:c5:c5:55:75:e5
*spamApTask7: Oct 22 10:56:11.290: %CAPWAP-3-DTLS_CLOSED_ERR: [PA]capwap_ac_sm.c:7095 75:c5:c5:55:75:e5 : DTLS connection closed forAP 192:168:1:32 (5256), Controller: 192:168:1:2 (5246) Multiple Join Request
*spamApTask4: Oct 22 09:40:19.636: %CAPWAP-3-DTLS_CLOSED_ERR: [PA]capwap_ac_sm.c:7095 75:c5:c5:55:75:e5 : DTLS connection closed forAP 192:168:1:32 (5248), Controller: 192:168:1:2 (5246) Echo Timer Expiry
*spamApTask4: Oct 22 09:40:19.636: %CAPWAP-3-ECHO_ERR: [PA]capwap_ac_sm.c:7840 Did not receive heartbeat reply; AP: 75:c5:c5:55:75:e5

I also compared logs between the AP that is ok and the AP that is rebooting and not getting the Full Power. I am posting here only the difference...

AP_GOOD_ONE#sh logging
Oct 22 10:34:21 brain: Power mode: Full-Power, power_detection: DC_adapter(FALSE), 802.3AF_POE(FALSE)

AP_BAD_ONE#sh logging
System logging:
Oct 22 10:34:02 brain: CDP PoE - waiting for CDP from PSE, timeout 60
Oct 22 10:34:03 brain: CDP PoE - waiting for CDP from PSE, timeout 59
Oct 22 10:34:03 brain: CDP PoE - waiting for CDP from PSE, timeout 58
Oct 22 10:34:03 brain: CDP PoE - waiting for CDP from PSE, timeout 57
Oct 22 10:34:04 brain: CDP PoE - waiting for CDP from PSE, timeout 56
Oct 22 10:34:05 brain: CDP PoE - waiting for CDP from PSE, timeout 55
Oct 22 10:34:06 brain: CDP PoE - waiting for CDP from PSE, timeout 54
Oct 22 10:34:07 brain: CDP PoE - waiting for CDP from PSE, timeout 53
Oct 22 10:34:08 brain: CDP PoE - waiting for CDP from PSE, timeout 52
Oct 22 10:34:09 brain: CDP PoE - waiting for CDP from PSE, timeout 51
Oct 22 10:34:10 brain: CDP PoE - waiting for CDP from PSE, timeout 50
Oct 22 10:34:11 brain: CDP PoE - waiting for CDP from PSE, timeout 49
Oct 22 10:34:12 brain: CDP PoE - waiting for CDP from PSE, timeout 48
Oct 22 10:34:13 brain: CDP PoE - waiting for CDP from PSE, timeout 47
Oct 22 10:34:14 brain: CDP PoE - waiting for CDP from PSE, timeout 46
Oct 22 10:34:15 brain: CDP PoE - waiting for CDP from PSE, timeout 45
Oct 22 10:34:16 brain: CDP PoE - waiting for CDP from PSE, timeout 44
Oct 22 10:34:17 brain: CDP PoE - waiting for CDP from PSE, timeout 43
Oct 22 10:34:18 brain: CDP PoE - waiting for CDP from PSE, timeout 42
Oct 22 10:34:19 brain: CDP PoE - waiting for CDP from PSE, timeout 41
Oct 22 10:34:20 brain: CDP PoE - waiting for CDP from PSE, timeout 40
Oct 22 10:34:21 brain: CDP PoE - waiting for CDP from PSE, timeout 39
Oct 22 10:34:22 brain: CDP PoE - waiting for CDP from PSE, timeout 38
Oct 22 10:34:23 brain: CDP PoE - waiting for CDP from PSE, timeout 37
Oct 22 10:34:24 brain: CDP PoE - waiting for CDP from PSE, timeout 36
Oct 22 10:34:26 brain: CDP PoE - waiting for CDP from PSE, timeout 35
Oct 22 10:34:27 brain: CDP PoE - waiting for CDP from PSE, timeout 34
Oct 22 10:34:28 brain: CDP PoE - waiting for CDP from PSE, timeout 33
Oct 22 10:34:29 brain: CDP PoE - waiting for CDP from PSE, timeout 32
Oct 22 10:34:30 brain: CDP PoE - waiting for CDP from PSE, timeout 31
Oct 22 10:34:31 brain: CDP PoE - waiting for CDP from PSE, timeout 30
Oct 22 10:34:32 brain: CDP PoE - waiting for CDP from PSE, timeout 29
Oct 22 10:34:33 brain: CDP PoE - waiting for CDP from PSE, timeout 28
Oct 22 10:35:35 brain: CDP PoE - waiting for CDP from PSE, timeout 27
Oct 22 10:35:36 brain: CDP PoE - waiting for CDP from PSE, timeout 26
Oct 22 10:35:37 brain: CDP PoE - waiting for CDP from PSE, timeout 25
Oct 22 10:35:38 brain: CDP PoE - waiting for CDP from PSE, timeout 24
Oct 22 10:35:39 brain: CDP PoE - waiting for CDP from PSE, timeout 23
Oct 22 10:35:40 brain: CDP PoE - waiting for CDP from PSE, timeout 22
Oct 22 10:35:41 brain: CDP PoE negotiation START
Oct 22 10:36:52 brain: CDP PoE negotiation FAILED !!
Oct 22 10:36:52 brain: LLDP PoE negotiation START
Oct 22 10:37:24 brain: LLDP PoE negotiation FAILED !!
Oct 22 10:37:24 brain: Power mode: Degraded/Reduced Power, power_detection: DC_adapter(FALSE), 802.3AF_POE(TRUE)

Leo TI · ‎01-13-2022

I have the 6 AP 1850 mobility express, with the same problem I was with version 8.10.151.0 and it restarted every 30 to 40 passes 8.10.162.0 and now it restarts every 24 or 48 hours and I see that the wlc changes ap every Once, check the power injector cables, the switches to which they are connected were updated by the:

Jan 11 20:03:41 brain: CDP PoE negotiation FAILED !!
Jan 11 20:03:41 brain: LLDP PoE negotiation START
--More--

Jan 11 20:04:14 brain: LLDP PoE negotiation FAILED !!
Jan 11 20:04:14 brain: Power mode: Full-Power, power_detection: DC_adapter (FALSE), 802.3AF_POE (FALSE)

In the wlc configuration point the use of power injector through cli to the APs. But they keep restarting, does anyone have a solution?

B A · ‎05-09-2022

We had old Cisco switches and a year ago we replaced them with Cisco C1000. The issue has been gone since then.