please delete this post

[Dunuin]

No, no one has access at the moment. There is no way I can revert back to how it was before?

Not if you didn't backuped the "/etc" folder (which you should do regularly to also have host backuos in addition to your guest backups).

 

[kemil]

Not if you didn't backuped the "/etc" folder (which you should do regularly to also have host backuos in addition to your guest backups).

No backups. But what makes the /etc/network/interfaces empty?? I just run the cmd, apt install ifupdown2 and now in rescue mode. no network?

 

[alexskysilk]

Hey, I tried this but did not work. If you could check and let me know what could be wrong.

2: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 56:b2:32:58:4e:bc brd ff:ff:ff:ff:ff:ff

if you applied the configuration I showed you and rebooted, there would be no bond0. I also have no knowledge where ifb's, tuns, taps, and gres are coming from. for the purpose of troubleshooting turn all that off until you get to the root cause.

Its really very simple. use ethtool to see which of your nics (eth0,1) has an ethernet connection. use that nic for your bridge port.

Once you verify, then you can build the rest of your networking.

 

[Dunuin]

it was same as the working server
vmbr0 as bridge and eno1 and eno2 as network devices.

Did you actually use both if the NICs? Or just one of them? Because in case you used them as for example a LACP bond, the switch was setup listen to a LACP bond too and we could try as much as we want create single NIC connection and it will fail.

 

[vesalius]

No, no one has access at the moment. There is no way I can revert back to how it was before?

If you had a backup before changes, yes. Otherwise no.

 

[kemil]

if you applied the configuration I showed you and rebooted, there would be no bond0. I also have no knowledge where ifb's, tuns, taps, and gres are coming from. for the purpose of troubleshooting turn all that off until you get to the root cause.

I did apply it and rebooted. I am not sure from where ifb's and others came from either.

Its really very simple. use ethtool to see which of your nics (eth0,1) has an ethernet connection. use that nic for your bridge port.

I think it is eth0.

Once you verify, then you can build the rest of your networking.