[SOLVED] Bridge with no internet connectivity


Sep 12, 2019
Hopefully the brains trust can help, I'm sure there is an obvious solution here but I cant seem to find it.

Fresh install of Proxmox 8.0.4
Hardware is an Intel NUC with 2 NICs
VM is a fresh install of Rocky Linux 9.2

I have a Unifi setup and have created 2 individual networks one of which my Proxmox server is running on. It has an IP of I would like to spin up some VMs/containers that utilise the network, however when I create the bridge (vmbr107) there is no internet connectivity, in fact I cant ping anything at all.

This made me think there was a firewall rule blocking traffic but that's not the case - screenshot of firewall rules attached. ip a shows the IP address of the VM is this is a static IP set up during the VM install and my Unifi controller has a rule that will allow this IP address to contact the network.

I tried to ssh into the VM from my main machine which has unrestricted access to both networks but the result was no route to host. So there's obviously something fundamentally wrong with my setup.

I've also attached a screenshot of the nmcli output in case that is of use.

This is the contents of /etc/network/interfaces:
auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual

auto enp5s0
iface enp5s0 inet manual

auto vmbr0
iface vmbr0 inet static
        bridge-ports eno1
        bridge-stp off
        bridge-fd 0
#The LAN Before Time

auto vmbr107
iface vmbr107 inet static
        bridge-ports enp5s0
        bridge-stp off
        bridge-fd 0
#IoT Network

I'm really trying to understand what the issue is here. Thanks in advance for the help.


  • firewall.png
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  • nmcli.png
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Created a Bond with both NICs, added the bond as a slave to the vmbr0 bridge. Made the bridge VLAN aware then tagged each VM with the VLAN number.


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