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Hi again, thanks for the reply. It seems to be a Lenovo specific BIOS bug. Did an BIOS update for my M920q and now it works! ChatGPT told me it's the "PHY-Bug".

Hi everyone, I'm experiencing a consistent issue where every time I restart my router (FritzBox), my Unraid server loses its network connection and becomes unreachable. The only way to restore connectivity is a hard reboot of the server itself. I did an update from 7.0.1 -> 7.1.4, but the problem persists. I've captured the syslog from the moment I restart the router, and I've attached the full log to this post. Here is a key snippet from the log showing the moment of failure: Oct 18 19:00:41 Lenovo-Unraid dhcpcd[1607]: br0: fe80::3e37:12ff:fe65:8b39: no longer a default router Oct 18 19:00:41 Lenovo-Unraid dhcpcd[1607]: br0: deleting default route via fe80::3e37:12ff:fe65:8b39 Oct 18 19:00:55 Lenovo-Unraid dhcpcd[1607]: br0: failed to request DHCPv6 information Oct 18 19:01:13 Lenovo-Unraid kernel: e1000e 0000:00:1f.6 eth0: NIC Link is Down Oct 18 19:01:13 Lenovo-Unraid kernel: bond0: (slave eth0): link status definitely down, disabling slave Oct 18 19:01:13 Lenovo-Unraid kernel: e1000e 0000:00:1f.6 eth0: left promiscuous mode Oct 18 19:01:13 Lenovo-Unraid kernel: e1000e 0000:00:1f.6 eth0: left allmulticast mode Oct 18 19:01:13 Lenovo-Unraid kernel: bond0: now running without any active interface! Oct 18 19:01:13 Lenovo-Unraid kernel: br0: port 1(bond0) entered disabled state Oct 18 19:01:14 Lenovo-Unraid dhcpcd[1607]: br0: carrier lost Oct 18 19:01:14 Lenovo-Unraid dhcpcd[1538]: br0: carrier lost Oct 18 19:01:14 Lenovo-Unraid avahi-daemon[15548]: Withdrawing address record for 192.168.1.10 on br0. Oct 18 19:01:14 Lenovo-Unraid avahi-daemon[15548]: Leaving mDNS multicast group on interface br0.IPv4 with address 192.168.1.10. Oct 18 19:01:14 Lenovo-Unraid avahi-daemon[15548]: Interface br0.IPv4 no longer relevant for mDNS. Oct 18 19:01:14 Lenovo-Unraid dhcpcd[1538]: br0: deleting route to 192.168.1.0/24 Oct 18 19:01:14 Lenovo-Unraid dhcpcd[1538]: br0: deleting default route via 192.168.1.1 Oct 18 19:01:14 Lenovo-Unraid dhcpcd[1607]: br0: deleting address 2003:de:1736:b700:9afa:9bff:fe3c:957d/64 Syslog 7.0.1.rtf Syslog 7.1.4.rtf