Re: Anyone else seen this. [Draytek rebooting]

On 03/07/2026 16:21, The Natural Philosopher wrote:
> Recently my router (Draytek 2726) has been spontaneously rebooting.
> 
> Examination of the logs show a kernel panic caused by 'attempt to 
> execute an illegal instruction'.
> 
> My assumption, possibly erroneous, is that the actual firmware code is 
> corrupted
> The router is rated only to +45°C but that is the recommended limit for 
> flash memory, and the room temperature has been up towards 40°C. which 
> doesn't leave a great deal of margin for router internal heat production.
> My query is whether anyone else has seen issues with flash memory in the 
> recent hear wave.
> 
> Surely phones get hotter than this?
> 
> Genuinely interested in other's experiences.
> 

I have a Draytek 2927 series - it is not new to me, but was previously 
used in a commercial environment with no issues AFAIK.

I have noticed a situation with mine where the connection both wired and 
wireless) appears to drop momentarily, on occasion (couple of times a week?)

I recently looked at the log, and saw something similar to what you 
describe - the router was in fact rebooting, and the log shows something 
like:

 > sys ver dbg

Router Model: Vigor2927ax    Version: 4.5.2 English
Profile version: 4.0.0    Status: 1 (0x9de71d0f)
Router IP: 192.168.0.1    Netmask: 255.255.255.0
Firmware Build Date/Time: Feb 12 2026 17:45:01
Router Name: DrayTek
Revision: 6562_fd593bfca2 drayos2015
Router serial no: None

---------firmware exception debug info on cpu0-----------------------------

# etc.

There are a few Draytek support pages around this, and typically they 
want to blame the PSU. My PSU is not the original Draytek, but can 
supply substantially more current - 4.5A IIRC, so I doubt that is the
issue.

My router is not in one of the hotter places in the house. I have just 
felt it now, it is pretty warm though. I may try to lift it up off the 
shelf it sits one, for more airflow, to see if that makes a difference

(I should say that I think my issue has pre-dated the recent heatwaves)

     J^n