I have a similar issue with the following hardware:
Before that I had 7.0.14-15-pve and with that it never happened.
I reverted to 7.0.14-15-pve now and so far the issue did not reoccur. I will post an update if that changes.
Attached is an excerpt of my system log from the time when it happened and my /etc/network/interfaces file.
- Mainboard: Supermicro H12SSL-NT
- NIC: Broadcom BCM57416 NetXtreme-E 10GBase-T Ethernet
- First occurrence was 1.5 hours after booting
and - second occurrence was 1 hour after booting.
Before that I had 7.0.14-15-pve and with that it never happened.
I reverted to 7.0.14-15-pve now and so far the issue did not reoccur. I will post an update if that changes.
Attached is an excerpt of my system log from the time when it happened and my /etc/network/interfaces file.