Lan connectivity or interface problem

[Herewerare2024]

Ok so I have a F6-424 Max with the OS installed on an NVME drive with a secondary nvme for read/write cache. 64GB ram with a 48 GB "ramdisk" created for plex transcodes. I have the storage portion configured in EXT4 TRAID. I use LAN 1 for network and it is operating at 10G.

Lately the web interface and plex clients are unable to access the NAS. It is as though the NAS is disconnected from the network. Upon investigation in the router, there is the proper IP assigned to the nas in the client list of active addresses. I did observe that the NAS would disappear from the list periodically.

A reboot of the NAS seems to restore connectivity for a random amount of time. Recently, disconnecting the lan cable from the nas and reconnecting it also seems to restore connectivity for an indeterminate duration.

While I do feel more investigation is required in order to isolate the issue, I was wondering if anyone else experienced similar behavior. The device in about 30 days old.

Moving forward I will try utilizing lan 2 port and see if the fault disappears which would point at a lan 1 port problem. I will also try to replace the lan cable if the port swap doesn't affect positive results. The basic TOS 6 logs that populate do not indicate any network issues or any other errors. All drives in the system report "green" with no issues.

[Herewerare2024]

Update: Changed network port to LAN 2, removed USB connection to cyberpower UPS (Was bombarding syslog with status timeout entries). Has been stable over night. Wondering is the ramdisk creation ends up creating a memory problem but thats a wild shot in the dark.

Other interesting behavior includes PLEX clients being able to view available content but failed to launch playback. This self healed over time which I am at a loss to understand. No changes to the plex server ecosystem occurred during the troubleshooting time.

Indications at this time point to poor driver support for the UPS as it was the only change within the time frame. Still initially experienced connectivity issues when moving to lan 2. After 6 hours of intermittent checks, the usb connection to the UPS seemed to stabilize the lan connectivity.

There are adjustments referenced on support forum for alternative configurations for the usb connection but these changes do not persist after a reboot.

[IrisLi]

Thanks for the feedback!
From the information you provided, you are experiencing a series of issues related to the network, UPS (uninterruptible power supply), and the PLEX media server. Considering that the UPS is a recent factor of change, it is advisable to check if the drivers of the UPS are up to date or try to connect the UPS using a different USB port.
Since you mentioned that the problem is self-healing, it may indicate that this is a transient network or server performance issue.

Regarding the issue that you found on the forum that the alternative configuration adjustment does not persist after the reboot, our lab will verify this issue.

It is advisable to continue to monitor the stability of the system, especially the network connection and the working status of the UPS.
If the problem recurs, please feel free to contact us again.

[Herewerare2024]

System remained stable with the UPS disconnected (USB). Still on lan 2, will move to LAN 1 and repeat multiday stability test. Indications at this time point to TOS 6 not directly supporting the UPS "out of the box". TOS 6 may require additional driver update or software?

[Herewerare2024]

Specific UPS: CyberPower CP1500PFCLCD PFC Sinewave UPS System, 1500VA. Installation was literally just plugging in via usb. Seemed to be "plug and play" but over time (about 12hours) the system became inaccessible via web interface and plex server non-reachable to clients.

[bugacha]

Ok so I have a F6-424 Max with the OS installed on an NVME drive with a secondary nvme for read/write cache. 64GB ram with a 48 GB "ramdisk" created for plex transcodes. I have the storage portion configured in EXT4 TRAID. I use LAN 1 for network and it is operating at 10G.

Lately the web interface and plex clients are unable to access the NAS. It is as though the NAS is disconnected from the network. Upon investigation in the router, there is the proper IP assigned to the nas in the client list of active addresses. I did observe that the NAS would disappear from the list periodically.

A reboot of the NAS seems to restore connectivity for a random amount of time. Recently, disconnecting the lan cable from the nas and reconnecting it also seems to restore connectivity for an indeterminate duration.

While I do feel more investigation is required in order to isolate the issue, I was wondering if anyone else experienced similar behavior. The device in about 30 days old.

Moving forward I will try utilizing lan 2 port and see if the fault disappears which would point at a lan 1 port problem. I will also try to replace the lan cable if the port swap doesn't affect positive results. The basic TOS 6 logs that populate do not indicate any network issues or any other errors. All drives in the system report "green" with no issues.

On your switch, trying fixing speed to 10G on port where NAS is connected and check if this makes difference

[Herewerare2024]

Bit of an update, tested that the instability was not tied to a specific ethernet port. Disconnecting the usb interface to the UPS did increase the time before the NAS would stop communicating over LAN. I reconfigured which usb drivers via the UPS config files with some degree of success. I was not able to prevent all errors related from continuing to populate the syslog but reduced some types of entries.
I did not feel the configuration would have much of an impact and found that the NAS would stop responding to LAN after again a day or two. I realized that plugging and unplugging the LAN cable would reconnect the NAS without requiring a reboot. I implemented a daily network reset via scheduled tasks which has proven to keep the NAS reliably connected for the past couple weeks.

The ram disk for plex transcodes is still auto created via script on boot. Drive remains active so it doesn't seem to be causing a memory issue or some such thing. No amount of app usage seems to affect the situation. Logs do not indicate any specific issue causing the LAN issues. What causes the LAN to cease "talking", I do not know.

As to the specific reason of this issue, I cannot identify it specifically. I basically ruled out hardware failure and suspect configuration to some degree is causing some of the experienced issue. Most of the NAS is stock and the connected network is not overly complex. I will continue to monitor this thread as someone else may see the same behavior and any other solutions would be great to know.

[mrslother]

For what it's worth, my week old nas (u4-423) experiences similar problems when I plug in the UPS' USB cable. System almost immediately becomes unresponsive and requires pulling out the usb cable and rebooting.

Running latest TOS6. Feels more like a fragile and brittle beta.

[TMeric]

Bit of an update, tested that the instability was not tied to a specific ethernet port. Disconnecting the usb interface to the UPS did increase the time before the NAS would stop communicating over LAN. I reconfigured which usb drivers via the UPS config files with some degree of success. I was not able to prevent all errors related from continuing to populate the syslog but reduced some types of entries.
I did not feel the configuration would have much of an impact and found that the NAS would stop responding to LAN after again a day or two. I realized that plugging and unplugging the LAN cable would reconnect the NAS without requiring a reboot. I implemented a daily network reset via scheduled tasks which has proven to keep the NAS reliably connected for the past couple weeks.

The ram disk for plex transcodes is still auto created via script on boot. Drive remains active so it doesn't seem to be causing a memory issue or some such thing. No amount of app usage seems to affect the situation. Logs do not indicate any specific issue causing the LAN issues. What causes the LAN to cease "talking", I do not know.

As to the specific reason of this issue, I cannot identify it specifically. I basically ruled out hardware failure and suspect configuration to some degree is causing some of the experienced issue. Most of the NAS is stock and the connected network is not overly complex. I will continue to monitor this thread as someone else may see the same behavior and any other solutions would be great to know.

This is an unusual issue, and we haven't encountered it on our side. You could also try removing Hyper Cache and see if that resolves the issue of the NAS disappearing from the network.

[Herewerare2024]

I do have the OS on one NVME and the hyper cache enable on the second NVME. I did read that this was not a supported configuration but that was met with mixed reviews as far as that still being the current case. While I was able to create a hyper cache I wasn't sure it was actually being utilized as the usage on the drive never changes. To test the system network stability without the hyper cache is easy. Given the current daily network reset has band aided the situation effectively I will look into the possibility after the holiday period. Additionally, I updated the OS to the 535 release and while I am unaware of any changes in the update that would impact this situation perhaps some affect will be had from that as well.