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

[Eneko Lacunza]

Hi Justin,

El 16/9/22 a las 10:06, Justin Gräflich escribió:
> 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.

This might probe problematic... :)

>
> 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
>

I suggest you to not set IP for vmbr1 and vmbr2.

>
>
>
> 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.

192.168.178.1 is a VM hosted in Proxmox?

>
> 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.

I don't understand this. How do VMs know what DNS server to use if not 
configured in resolv.conf?

>
> Some machines only working with the "ifup" command.

Don't understand this. They don't have network until you perform ifup 
inside guest?

Cheers

Eneko Lacunza
Zuzendari teknikoa | Director técnico
Binovo IT Human Project

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