Intermittent network connection

[voideris]

Hello everyone,
I am experiencing intermittent network connection drops. At first I was thinking it was my multi WAN failover setup doing some strange things but after few test runs with unplugging failover WAN connection I could not replicate the issue.

After scouring the forum for similar case I found one:
https://forum.opnsense.org/index.php?topic=22086.0

But the difference is that my hardware does not use Realtek based cards. I am using Shuttle barebone with:

• I211 Gigabit Network card on motherboards reported as I211 card
• 4 port INTEL PRO 1000VT on PCI-E reported as 82576 Gigabit Network Connection

Code: [Select]

OPNsense 21.1.4-amd64
FreeBSD 12.1-RELEASE-p15-HBSD
OpenSSL 1.1.1k 25 Mar 2021

Ping log from another machine:

Code: [Select]

2021-04-15 00:18:38 8.8.8.8 : [22980], 64 bytes, 62.0 ms (57.7 avg, 0% loss)
2021-04-15 00:18:48 8.8.8.8 : [22981], 64 bytes, 62.0 ms (57.7 avg, 0% loss)
2021-04-15 00:18:58 8.8.8.8 : [22982], 64 bytes, 61.6 ms (57.7 avg, 0% loss)
2021-04-15 00:19:09 8.8.8.8 : [22983], timed out (57.7 avg, 0% loss)
2021-04-15 00:19:19 8.8.8.8 : [22984], timed out (57.7 avg, 0% loss)
2021-04-15 00:19:29 8.8.8.8 : [22985], timed out (57.7 avg, 0% loss)
2021-04-15 00:19:39 8.8.8.8 : [22986], timed out (57.7 avg, 0% loss)
2021-04-15 00:19:49 8.8.8.8 : [22987], timed out (57.7 avg, 0% loss)
2021-04-15 00:19:59 8.8.8.8 : [22988], timed out (57.7 avg, 0% loss)
2021-04-15 00:20:09 8.8.8.8 : [22989], timed out (57.7 avg, 0% loss)
2021-04-15 00:20:19 8.8.8.8 : [22990], timed out (57.7 avg, 0% loss)
2021-04-15 00:20:29 8.8.8.8 : [22991], timed out (57.7 avg, 0% loss)
2021-04-15 00:20:39 8.8.8.8 : [22992], timed out (57.7 avg, 0% loss)
2021-04-15 00:20:49 8.8.8.8 : [22993], timed out (57.7 avg, 0% loss)
2021-04-15 00:20:59 8.8.8.8 : [22994], timed out (57.7 avg, 0% loss)
2021-04-15 00:21:09 8.8.8.8 : [22995], timed out (57.7 avg, 0% loss)
2021-04-15 00:21:19 8.8.8.8 : [22996], timed out (57.7 avg, 0% loss)
2021-04-15 00:21:29 8.8.8.8 : [22997], timed out (57.7 avg, 0% loss)
2021-04-15 00:21:39 8.8.8.8 : [22998], timed out (57.7 avg, 0% loss)
2021-04-15 00:21:49 8.8.8.8 : [22999], timed out (57.7 avg, 0% loss)
2021-04-15 00:21:59 8.8.8.8 : [23000], timed out (57.7 avg, 0% loss)
2021-04-15 00:22:09 8.8.8.8 : [23001], 64 bytes, 54.1 ms (57.7 avg, 0% loss)
2021-04-15 00:22:19 8.8.8.8 : [23002], 64 bytes, 52.9 ms (57.7 avg, 0% loss)
2021-04-15 00:22:29 8.8.8.8 : [23003], 64 bytes, 51.9 ms (57.7 avg, 0% loss)
2021-04-15 00:22:39 8.8.8.8 : [23004], 64 bytes, 53.5 ms (57.7 avg, 0% loss)

General log

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2021-04-14T22:52:31 configctl[26362] event @ 1618433550.50 exec: system event config_changed
2021-04-15T00:19:24 kernel pflog0: promiscuous mode disabled
2021-04-15T00:19:24 kernel pflog0: promiscuous mode enabled
2021-04-15T00:23:06 kernel pflog0: promiscuous mode disabled
2021-04-15T00:23:06 kernel pflog0: promiscuous mode enabled
2021-04-15T00:39:23 sshd[95206] Accepted publickey for [cut]
2021-04-15T00:48:04 kernel igb3: link state changed to DOWN
2021-04-15T00:48:04 opnsense[99928] /usr/local/etc/rc.linkup: DEVD Ethernet detached event for opt3
2021-04-15T00:48:04 dhclient[37819] connection closed
2021-04-15T00:48:04 dhclient[37819] exiting.
Backend log

Code: [Select]

2021-04-14T22:52:31 configd.py[98565] [d2f94373-bd62-4568-8ba9-7260118605c8] trigger config changed event2021-04-15T00:19:23 configd.py[98565] [32f40b91-58cb-477d-8639-feb052a6c508] Reloading filter
2021-04-15T00:19:24 configd.py[98565] [81fe5405-1866-43c4-95de-c731163efff4] generate template OPNsense/Filter
2021-04-15T00:19:24 configd.py[98565] generate template container OPNsense/Filter
2021-04-15T00:19:24 configd.py[98565] OPNsense/Filter generated //usr/local/etc/filter_tables.conf
2021-04-15T00:19:24 configd.py[98565] OPNsense/Filter generated //usr/local/etc/filter_geoip.conf
2021-04-15T00:19:24 configd.py[98565] [b7390b54-6ad0-4b21-b6b2-0b07b91bb70e] refresh url table aliases
2021-04-15T00:19:24 configd.py[98565] [b9233996-cfdf-4933-a290-496eb8f89fbf] updating dyndns [cut]
2021-04-15T00:19:24 configd.py[98565] message b7390b54-6ad0-4b21-b6b2-0b07b91bb70e [filter.refresh_aliases] returned {"status": "ok"}
2021-04-15T00:23:06 configd.py[98565] [a82d9ef4-d7f5-4da0-8a41-33f421c65c8a] Reloading filter
2021-04-15T00:23:06 configd.py[98565] [872c4080-1f2e-4fdc-97eb-ab4682549533] generate template OPNsense/Filter
2021-04-15T00:23:06 configd.py[98565] generate template container OPNsense/Filter
2021-04-15T00:23:06 configd.py[98565] OPNsense/Filter generated //usr/local/etc/filter_tables.conf
2021-04-15T00:23:06 configd.py[98565] OPNsense/Filter generated //usr/local/etc/filter_geoip.conf
2021-04-15T00:23:06 configd.py[98565] [a47d9cd9-b9cd-4f99-a5ff-63eb71945bab] refresh url table aliases
2021-04-15T00:23:06 configd.py[98565] [01adcf42-85b0-4125-bd81-f94186a56fdd] updating dyndns [cut]
2021-04-15T00:23:07 configd.py[98565] message a47d9cd9-b9cd-4f99-a5ff-63eb71945bab [filter.refresh_aliases] returned {"status": "ok"}


After looking at the logs the issue seem similar in a way that there is "kernel   pflog0: promiscuous mode disabled" nearly at the same time I get connection loss.

Is there anything more that I could do to narrow issue down? I specifically went with Intel based card to avoid known Realtek drivers issues.

Apart from multi WAN  failover setup (followed avaiable tutorial) I have installed:

• os-acme-client not used
• os-clamav not used
• os-dyndns not used
• os-iperf
• os-smart
• os-upnp not used