[PVE-User] (Newbie) Problems setting up Bridges for Multiple NICs

[Justin Gräflich]

Hello dear Proxmox Community, my Proxmox environment has 3 Ethernet Ports 
(2x 2,5GbE PCIe and 1x GbE Onboard as default Bridge)

And i want to set them up as multiple bridges, working in the same network.




The reason for that is, to distribute the load to different connections.




I configured the two NICs like:

Vmbr0 (Proxmox default)

IPv4/CIDR 192.168.178.11/24

Gateway 192.168.178.1

Autostart = yes

VLAN Aware =yes




Vmbr1 (2,5GbE Nic)

IPv4/CIDR 192.168.178.12/24

Gateway (Clean)

Autostart = yes

VLAN Aware = No




Vmbr2 (2,5GbE Nic)

IPv4/CIDR 192.168.178.13/24

Gateway (Clean)

Autostart = yes

VLAN Aware = No




DNS Setting of my Proxmox:

DNS1: 192.168.178.1

DNS2: 1.1.1.1

DNS3: 8.8.8.8




My problem is, the machines have trouble with their DNS Resolvers.




Port is connected to the guests and if i set up a DNS to them locally in 
/etc/resolv.conf it works as expected, but it's just a temporary fix.




Some machines only working with the "ifup" command.




I also tested it with CloudInit and preconfigured Network setting, but it 
didn't work either.




Hope someone can help me, maybe i get something wrong and is able to 
explain me how to do it right.







Thank you very much!