> In your case you could simply remove the stanzas for enp4s0f0 and enp4s0f1 > which would leave you with just the stanza for bond1:
> iface bond1 inet static > bond-slaves enp4s0f0 enp4s0f1 Thank you Oleander. It works with this hint (the physical interfaces were left out of the config). Working config: ===================================================== ck@bullseye:~$ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback auto bond0 iface bond0 inet static address 192.168.12.4/24 gateway 192.168.12.1 bond-slaves enp3s0f0 enp3s0f1 bond-mode 802.3ad bond-miimon 100 bond-lacp-rate 1 ===================================================== > That should work but it is still a regression as it breaks configuration > which worked before. Yes, agree. Do you know if your patch (I have not tested) will be included in the next point release? > https://serverfault.com/a/1075192/267378 > > Best regards, > Arunas You mention both bond-master of the physical devices and blond-slaves on the bond interface. This causes networking service to hiccup in my case: Sep 01 15:58:23 irczsrvp09 systemd[1]: Starting Raise network interfaces... Sep 01 15:58:23 irczsrvp09 ifup[1251]: No iface stanza found for master bond0 Sep 01 15:58:23 irczsrvp09 ifup[1249]: run-parts: /etc/network/if-pre-up.d/ifenslave exited with return code 1 Sep 01 15:58:23 irczsrvp09 ifup[1242]: ifup: failed to bring up enp3s0f0 Sep 01 15:58:23 irczsrvp09 ifup[1256]: No iface stanza found for master bond0 Sep 01 15:58:23 irczsrvp09 ifup[1254]: run-parts: /etc/network/if-pre-up.d/ifenslave exited with return code 1 Sep 01 15:58:23 irczsrvp09 ifup[1242]: ifup: failed to bring up enp3s0f1 Sep 01 15:58:23 irczsrvp09 ifup[1261]: No iface stanza found for master bond1 Sep 01 15:58:23 irczsrvp09 ifup[1259]: run-parts: /etc/network/if-pre-up.d/ifenslave exited with return code 1 Sep 01 15:58:23 irczsrvp09 ifup[1242]: ifup: failed to bring up enp4s0f0 Sep 01 15:58:23 irczsrvp09 ifup[1266]: No iface stanza found for master bond1 Sep 01 15:58:23 irczsrvp09 ifup[1264]: run-parts: /etc/network/if-pre-up.d/ifenslave exited with return code 1 Sep 01 15:58:23 irczsrvp09 ifup[1242]: ifup: failed to bring up enp4s0f1 Although the bonding interface seems to work with your workaround, the Systemd service (networking) is stuck at failed state. So for now the "proper" way to fix this seems to be to remove the physical device stanzas and only use the bonding interfaces - until this bug is fixed.
