topic Re: Random AP reboots: heartbeats lost + kernel panic in Access Points - Indoor and Outdoor

Random AP reboots: heartbeats lost + kernel panic

pieter_schepens — Fri, 31 Jan 2020 08:18:45 GMT

We're seeing random reboots of certain AP's (R500 and R510), connected to our ZoneDirector 1200 (release 10.3.1.0 build 21).

In the ZoneDirector Events/Activities:
AP[...] joins with uptime [79] s and last disconnected reason [AP Restart : kernel panic]

In the AP Events/Activities:
First AP[...] heartbeats lost, followed by AP[...] joins with uptime [79] s and last disconnected reason [AP Restart : kernel panic]the same entry as

There's no pattern as to when it occurs: it can happen in the middle of the night, during working hours, not always on the same AP's. We don't know what's the reason of those kernel panics and we can't reproduce the issue. Any advice or related information could be helpful.

Re: Random AP reboots: heartbeats lost + kernel panic

alexey_isakov — Fri, 31 Jan 2020 08:25:58 GMT

I have had an expirience whith the same situation on the cisco APs. There were due to SIP on wifi phones.

Re: Random AP reboots: heartbeats lost + kernel panic

andrew_mwakudua — Sun, 02 Feb 2020 14:13:06 GMT

Sip on phones?

Re: Random AP reboots: heartbeats lost + kernel panic

sanjay_kumar — Mon, 03 Feb 2020 01:20:04 GMT

Hi Pieter,

I would suggest you to open a case with the support team so that we can check on the logs based on the event and identify the issue.

Re: Random AP reboots: heartbeats lost + kernel panic

alexey_isakov — Mon, 03 Feb 2020 06:17:34 GMT

You should better to open a case & pick up some logs.
In another vendor, not ruckus, the reason of the same troubles was:
While SIP call initiation, AP crashes and Kernel panic seen. Root Cause: While SIP call initiation, WLC sends AP_SIP_CAC_CALL_BW_PAYLOAD to AP. The Payload contains SIP INVITE message, which further has to be sent to client. After AP receive the payload, AP makes Packet (SIP INVITE) from buffer inside the payload but didn't set transport header location in the packet. While the packet reach IPClassifier element, Transport header is dereferenced and crash happens. This issue got exposed after IPClassifier element was inserted between sip_snooping_tx and todev_aprXvY path
You'd better open a case in Ruckus.

Re: Random AP reboots: heartbeats lost + kernel panic

pieter_schepens — Thu, 06 Feb 2020 11:55:06 GMT

Since the update of the ZoneDirector to 10.4.0.0 build 69, we're seeing more random AP reboots, but with another reason in the logs: AP Restart : target fail detect.

Re: Random AP reboots: heartbeats lost + kernel panic

pieter_schepens — Fri, 28 Feb 2020 12:11:13 GMT

Update: we performed a factory reset on a couple of AP's on which the reboots occurred (kernel panic or target fail detect). After more than a week, those AP's that have been reset are behaving normal again: the occasional reboots haven't occurred again.
We'll watch it closely and will reset other AP's that have the same issue.