Self Rebooting and "Detected Cold Boot"

[davidvw]

We have been having a reoccurring issue with one of our Netonix switches. There are two at this particular location but only one of them is having the issue.

What has been happening is that the switch will often reboot it self when the other will not. We have already replaced this unit and still have the same problem. As far as I know, they are both being powered off the same supply but I can get more details related to that.

This morning it did not reboot or maybe just not completely but the log stated:

Code: Select all

Apr 13 12:17:56 switch[923]: Error reading temp sensor
Apr 13 12:17:58 switch[979]: Detected cold boot
Apr 13 12:17:58 switch[927]: Unable to read shutdown flag from power supply after 10 tries, still trying...
Apr 13 12:17:59 switch[979]: PoE enabled on port 2, PoE Smart is starting cable check
Apr 13 12:18:00 switch[979]: Port 2 cable check results: Ok, Ok, Ok, Ok
Apr 13 12:18:00 switch[979]: Port 2 passed PoE Smart cable check, turning on power


Port 2 just by the way is sending PoE to one of our devices and would have been offline during that time.

And the status page shows many errors related to power:



What is odd is that this time the device uptime is over 3 days. I double checked this with our monitoring software. We definitely lost connection to it though during the time stated in the log as well as several other times just this morning.

Any help or guidance would be appreciated to help troubleshoot this.

[sirhc]

Is this location near an FM broadcast tower?

[davidvw]

Is this location near an FM broadcast tower?

Yes, actually it is. Sorry I forgot that detail.

That's interesting you mention that. What clued you off?

[sirhc]

Because we already know our DC switches do NOT work at FM tower locations.

We are working on a hardware fix.

Read this thread: viewtopic.php?f=17&t=1342&hilit=fm+tower

READ THE WHOLE THREAD

[davidvw]

Thanks I'll look through that thread.

We may be able to work around this issue for now. Any ETA on a fix?

[sirhc]

Thanks I'll look through that thread.

We may be able to work around this issue for now. Any ETA on a fix?

This is not something that can be fixed with software. We have a new software coming out tonight v1.4.0rc12 that will make it a little better "MAYBE"

This will require a hardware change which we have done already and will be implemented in the next production batch.

All of our AC switches do work fine at FM Towers.

We might consider putting in a software change that makes the switch DC dumb which means it will just work but not be able to monitor DC input and such.