Create Bridged error: iface eno1 - ip address can't be set on interface if bridged in vmbr0 (500)

[Igor Vinicios]

Good afternoon,

After installing proxmox ve on Debian 12 bookworm, I am unable to create the vmbr0 bridge pointing to my NIC eno1, the following error is reported:


iface eno1 - ip address can't be set on interface if bridged in vmbr0 (500)

Can someone help me? to resolve this error, my vms will not connect to the internet if this point is not resolved. Thank you for your attention.

 

[Vlodek]

Hello,

can you please post the output of commands

ip a
cat /etc/network/interfaces

I assume you used the installation description from the site:

Install Proxmox VE on Debian 12 Bookworm

Where do you create vmbr0 ? Through a GUI?

Vlodek

 

[Igor Vinicios]

Hello,

can you please post the output of commands

ip a
cat /etc/network/interfaces

I assume you used the installation description from the site:

Install Proxmox VE on Debian 12 Bookworm

Where do you create vmbr0 ? Through a GUI?

Vlodek

source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet static
address 172.20.100.14/23
gateway 172.20.100.253
dns-nameservers 172.20.100.1
dns-search proxmox.local
# dns-* options are implemented by the resolvconf package, if installed

iface enp3s0f0 inet manual

iface enp3s0f1 inet manual


Exactly I did the installation using the link https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_12_Bookworm as a reference. vmbr0 was created in the Proxmox VE web interface.

 

[Vlodek]

Hello,

if you want to connect vmbr0 to eno1, eno1 must not have an address assigned to it.
Remove the config IP address from eno1, create a vmbr0 and configure the addressing to vmbr0

address 172.20.100.14/23
gateway 172.20.100.253
dns-nameservers 172.20.100.1

Look at:
https://pve.proxmox.com/wiki/Network_Configuration#_default_configuration_using_a_bridge

Vlodek