Bridge and tag work but VNet does not

cboyles

New Member
Sep 3, 2025
10
0
1
When I create a VM and add the vmbr1 bridge with the vlan tag 201. The VM goes out and gets a DHCP ip with no problem, but when I use my VNets with the same bridge and tag. I get no connection. What am I missing?
 
Can you post your network configuration?

Code:
cat /etc/network/interfaces
cat /etc/network/interfaces.d/sdn

ip a

It's very likely related to the vlan-aware setting on the bridge, but I'd need to see the network configuration of your host to verify this
 
auto vmbr1
iface vmbr1 inet dhcp
bridge-ports eno8303
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094

#ClassNet

auto vmbr2
iface vmbr2 inet dhcp
bridge-ports eno12399np0
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094

#Hackfest

auto vmbr3
iface vmbr3 inet manual
bridge-ports eno12409np1
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094

#MGMT-Server

auto vmbr4
iface vmbr4 inet manual
bridge-ports eno8403
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094
 
Mar 05 09:41:53 Proxmox1 kernel: audit: type=1400 audit(1772725313.628:26019): apparmor="DENIED" operation="create" class="net" info="failed protocol match" error=-13 profile="/{,usr/}sbin/dhclient" pid=1478820 comm="dhclient" family="unix" sock_type="dgram" protocol=0 requested="create" denied="create" addr=none
system logs
 
auto CCDC
iface CCDC
bridge_ports vmbr1.1009
bridge_stp off
bridge_fd 0
alias 1009

auto CIIRC
iface CIIRC
bridge_ports vmbr1.1005
bridge_stp off
bridge_fd 0
alias 1005

auto CSI
iface CSI
bridge_ports vmbr1.1410
bridge_stp off
bridge_fd 0
alias 1410

auto CampNet
iface CampNet
bridge_ports vmbr1.1406
bridge_stp off
bridge_fd 0
alias 1406

auto Camps
iface Camps
bridge_ports vmbr1.1401
bridge_stp off
bridge_fd 0
alias 1401

auto Class1
iface Class1
bridge_ports vmbr1.1101
bridge_stp off
bridge_fd 0
alias 1101
 
I got it to work, thank you. I switched from vmbr1 to vmbr2. They both have the same configurations even on the switch. Not sure why vmbr1 didn't work though.