I've been fighting an intermittent networking issue with my Unraid server (currently on version 6.12.4) for some time now, and I'm hoping one of you will be able to point me in the right direction.

 

The symptom that I am noting is that outbound network connections to the WAN initiated by my Unraid server intermittently don't work. This state will persist for a few minutes, then output network connections to the WAN will start working again.

 

For example, I can be logged in to my server via SSH, with a `ping` command checking connectivity with Google DNS at `8.8.8.8`:

 

64 bytes from 8.8.8.8: icmp_seq=59 ident=48056 ttl=117 time=22.2 ms
64 bytes from 8.8.8.8: icmp_seq=60 ident=48056 ttl=117 time=22.1 ms
64 bytes from 8.8.8.8: icmp_seq=61 ident=48056 ttl=117 time=22.1 ms
64 bytes from 8.8.8.8: icmp_seq=62 ident=48056 ttl=117 time=22.0 ms
64 bytes from 8.8.8.8: icmp_seq=63 ident=48056 ttl=117 time=22.0 ms
64 bytes from 8.8.8.8: icmp_seq=64 ident=48056 ttl=117 time=22.2 ms
64 bytes from 8.8.8.8: icmp_seq=65 ident=48056 ttl=117 time=21.1 ms
64 bytes from 8.8.8.8: icmp_seq=66 ident=48056 ttl=117 time=22.1 ms
64 bytes from 8.8.8.8: icmp_seq=67 ident=48056 ttl=117 time=21.9 ms
no answer yet for icmp_seq=68
no answer yet for icmp_seq=69
no answer yet for icmp_seq=70
no answer yet for icmp_seq=71
no answer yet for icmp_seq=72
no answer yet for icmp_seq=73
no answer yet for icmp_seq=74
... (condensed)
no answer yet for icmp_seq=301
no answer yet for icmp_seq=302
64 bytes from 8.8.8.8: icmp_seq=303 ident=48056 ttl=117 time=21.9 ms
64 bytes from 8.8.8.8: icmp_seq=304 ident=48056 ttl=117 time=21.9 ms
64 bytes from 8.8.8.8: icmp_seq=305 ident=48056 ttl=117 time=21.6 ms
64 bytes from 8.8.8.8: icmp_seq=306 ident=48056 ttl=117 time=21.7 ms
64 bytes from 8.8.8.8: icmp_seq=307 ident=48056 ttl=117 time=21.4 ms

 

This affects traffic specifically from my Unraid server destined for the WAN. Pinging my router or another LAN device does not show this behavior. VMs running on my server are not affected. Docker containers appear to be affected.

 

Do you have any ideas what could be causing this intermittent issue? Any suggestions where I can go to troubleshoot further? Thanks in advance for your help.

scarif-diagnostics-20230914-1403.zip

Edited September 14, 20232 yr by Krennic

Nothing obvious in the syslog, I assume it covers an event? Do you know the time it happened?

Yes, the diagnostics upload would have covered one or more of these events since they occur multiple times per hour. The instance illustrated in the ping output would have occurred between 13:47 and 14:03 - after I opened the SSH session, but before I generated the diagnostics file.

There's nothing logged, suggesting it might not be an Unraid issue, if this happens multiple times a day I would try with a new flash drive with a stock install, to rule out any config issues.

I kept putting off using a stock install on a new flash drive as I still need to purchase one. However, I've noticed increased stability over the past month or so as my Storj node has been shut down. I'm now curious whether that is connected. I'll continue to monitor it and try a stock install if the issue returns.