Upgrade 6 to 7 - nic names changed - no network working

[Pierre-Yves]

Hello
I've got a 4 hosts cluster (3 with exactly the same hardware, and 1 with another).
I've launched an upgrade on one of my host a few hours ago (1 of the 3 same).
No problem during the upgrade.
At reboot, no network.
I found that my nic names have changed (for a part of them).
After looking after who became who using "udevadm info /sys/class/net/" on a same running host and on the upgraded host, I found that several of my nics have changed like this :
eno1 -> eno1 (no change)
eno2 -> eno2 (no change)
enp196s0f0 -> enp196s0f0 (no change)
enp196s0f1 -> enp196s0f1 (no change)
ens1f0 -> enp2s0f0
ens1f1 -> enp2s0f1
ens3f0 -> enp65s0f0
ens3f1 -> enp65s0f1

I update my "/etc/network/interfaces" file according to this new names and reboot.
No more network at all ...
Networking service seems to work when I ask "systemctl status networking", it answers "active (exited)".

Can you help me ?

Regards

 

[vesalius]

Some folks needed to configure bridge MAC-Address' explicitly, by switching to ifupdown2 and adding hwaddress to the respective entry in /etc/network/interfaces.

https://pve.proxmox.com/wiki/Upgrade_from_6.x_to_7.0#Network

 

[Pierre-Yves]

In my cluster, we both have bridges, bonds, vlans, iscsi, multipaths iscsi ...
This is not a good news that networking breaks upgrading 6 to 7.
Moreover it seems that something tells somewhere that enp196s0f0=enp196s0f0 when networking starts (show in the status at starting) ...
Maybe somewhere, you can assign new names to old ones in order not to modify your interfaces file (something in the beginnning of the interfaces file that would assign new names to old names : ens1f1=enp2s0f1).
Do you know something about this kind of things ?

 

[vesalius]

try this: https://wiki.debian.org/NetworkInterfaceNames#How_to_migrate_to_this_scheme_on_upgraded_systems

@spirit has been helpful on how to do this in the past as well as many other network issues.

https://forum.proxmox.com/threads/set-network-interface-name-in-vm.86848/post-380875

 

[spirit]

Some folks needed to configure bridge MAC-Address' explicitly, by switching to ifupdown2 and adding hwaddress to the respective entry in /etc/network/interfaces.

https://pve.proxmox.com/wiki/Upgrade_from_6.x_to_7.0#Network

hwaddress is not needed anymore with last ifupdown2 update.
(only needed of ifupdown1)

 

[Pierre-Yves]

Maybe the Support Team knowns hot how to solve this trouble. The nic name changing is indicated on the migration notes ...
I can post old /etc/network/interfaces running on my Proxmox v6 hosts and the new Proxmox v7 and they can tell what to change.

 

[Pierre-Yves]

I found.
In /etc/network/interfaces file, if your network cards are part of a bond, you did not put the "auto eth0" directive.
Now all works fine (except I have to find the new names of network cards and change them in the file).
Hope it will help someone.