GS1900-8 switch randomly reset/reboot (Fixed)

My topology:

[GS1900-8] Port 1 --- PC
[GS1900-8] Port 2 --- Fritzbox 6490 (DHCP)  --- WAN
[GS1900-8] Port 3 --- PC
[GS1900-8] Port 4 --- PC
[GS1900-8] Port 5 --- Netgear Powerline Adapter PLW1000  --- Netgear ProSafe GS105 Switch
[GS1900-8] Port 6 --- Brother MFC L2740DW Printer
[GS1900-8] Port 7 --- LAG1 --- Synology DS718+
[GS1900-8] Port 8 --- LAG1 --- Synology DS718+

Netgear Switch Topology:
Port 1 --- Sony Bravia TV
Port 2 --- empty
Port 3 --- empty
Port 4 --- Yamaha ax rv 779 Av Receiver

Reboots very infrequent. When my pc was on port 6, i had reboots every 2-3 hours. Now i have installed a beta firmware, to capture pakets with wireshark (pc needs to be port 1 for this to work). Since i put my pc at port 1 had no reboots for 30 hrs.

Hello, 

yesterday around 11 pm i sent a shutdown request to the synology NAS. When i checked next day, it was still online. it seems to have rebooted instead of shutdown. Strange thing is, shortly after i sent the shutdown request to the nas over the web gui, the gs1900 reboots appeared again. the reboots happened very frequently, sometimes even 3x in a hour. I counted 16 reboots in total from yesterday 11:30 pm. The latest reboot happened today at 4:30 pm (exact timestamp see file attached). i captured the latest reboot with wireshark (65 gb package files in total). i will compress them and upload to an ftp. i also have a ping.log to the fritzbox.

aprox. Reboot timestamp according to when i lost connection to a vm on the synology nas:

Just started to see the same symptoms with my 2 GS1900-8 switches although strangely my GS1900-24 is absolutely fine. One switch is worse than the other and is restarting regularly, sometimes multiple times per hour and othertimes it will stay up for a couple of hours.
From syslog:
<132> Mar 01 2018 08:01:35 192.168.1.22 %System-4: System reboot     192.168.1.22    01/03 08:01:36.386
<133> Jan 01 2017 00:00:09 192.168.1.22 %System-5-RESTART: System restarted - Warm Start     192.168.1.22    01/03 08:02:16.839   

This suggests that it was an initiated reboot and not some power failure. Both switches are running firmware 2.40 which I upgraded to yesterday but this had started happening on 2.30. I only began noticing this yesterday after starting to work on a new server on the worst of the 2 switches but it may have been happening for longer.
All my switches have at least one pair of 1Gb connections aggregated for trunk connections (the GS1900-24 has 2), the 2 GS1900-8s have a second static LAG for connection to my 2 VMWARE ESXi servers and the GS1900-24 has another LAG to a NAS device. All the switches are configured with 3 VLANs

I have created a crude network diagram



[GS1900-8] --- LAG1 --- GS1900-24
[GS1900-8] --- LAG1 --- GS1900-24
[GS1900-8] --- PC
[GS1900-8] --- Satellite receiver
[GS1900-8] --- Pioneer AV receiver
[GS1900-8] --- LAG2 -- VMware ESXi 6.5
[GS1900-8] --- LAG2 -- VMware ESXi 6.5
[GS1900-8] --- iLO port on HP Microserver Gen8

Hello Zyxel_Jason, thank for the PM, I will get it installed and do some packet capturing.

My NAS is a QNAP TS569 Pro which is powered down for all but a couple of hours one day a week when it backs up my file server, it does however still have connectivity as it's set to WOL. The NAS is directly connected to my GS1900-24 which is rock solid. Definitely no Fritzbox on my network!

I've done some more testing over the weekend and removed the aggregated trunk links (red lines on my diagram) so that all switches only have a single link and I found that:

• The better of the two GS1900-8 stayed up for 2 days before a random reboot and has currently been up for 1 day, 21 hours. So in nearly 4 days it's rebooted once, which is an improvement on multiple reboots although still not perfect!
• The other, the worst of the two, hasn't rebooted once in nearly 4 days compared to multiple times an hour

I'm leaning more towards a LAG config issue rather than a specific device as a result of what I've seen.

As mentioned I will try the beta firmware and capture some packets!

Steve