PVE loses network connection after kernel upgrade to proxmox-kernel-7.0.0-3-pve

[Psilospiral]

Greetings Forum,

Running PVE 9.1.9 on a Dell T630 & a Dell T620. After a recent upgrade, no network connection. When booting into proxmox-kernel-6.17.13-6-pve from GRUB, network functions normally.

When booting proxmox-kernel-7.0.0-3-pve, 'ip a' shows 'nic0' DOWN. 'ip link set nic0 up' brings it UP, but no connection and is no longer UP after a reboot.

Has anybody experienced this with the upgrade to kernel-7?

 

[daanw]

Hard to say without any logs/journals/config, but maybe 7.0.x names the interface(s) in a different way.
If for example 6.17.x names an interface eth0 and that eth0 name is used in the configurations, it won't work if 7.0.x names it nic0.
If so, either change the config so it uses nic0 instead of the old interface name, or use interface-pinning to keep the old name.
See: https://pve.proxmox.com/pve-docs/chapter-sysadmin.html#network_override_device_names

 

[shanreich]

as the previous poster already said, logs of the boot as well as an overview of the network configuration would be interesting:

journalctl -b > syslog.txt

cat /etc/network/interfaces
cat /etc/network/interfaces.d/sdn

 

[Psilospiral]

as the previous poster already said, logs of the boot as well as an overview of the network configuration would be interesting:

journalctl -b > syslog.txt

cat /etc/network/interfaces
cat /etc/network/interfaces.d/sdn

Stefan & daanw, thank you for responding. syslog.txt attached from a boot into kernel-6.17.13-6-pve. (I cannot ssh in to capture output when booting into kernel-7*, but can capture terminal screenshots via iDRAC if needed.)

Attached is an image of 'ip a' and /etc/network/interfaces from kernel-7.0.0-3-pve (on the left) and kernel-6.17.13-6-pve (on the right) for comparison. Both identify nic0 & nic1, but the boot into kernel-7 has no vmbr interface entry.

root@t620:~# stat /etc/network/interfaces.d/sdn
stat: cannot statx '/etc/network/interfaces.d/sdn': No such file or directory

Server's NIC is set to 10.0.0.41/16, 10.0.0.2 gateway