[SOLVED] issue with VLAN

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pagirard

New Member
Aug 19, 2024
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Hi all, I've searched and googled and tried so many ideas before posting this thread, please excuse me if the problem is simple but I simply can't figure it out

I have several VLANs on my home network but the key ones for my problem are:
1. VLAN 1 default
2. VLAN 60 Homelab

My proxmox server has 3 NICs:
* one for iLo/ipmi (on the homelab VLAN)
* 2 Gb nics that I have bridged onto my switch

So the proxmox host has a bond, is made VLAN aware and I'm allowing (I think) all other VLANs to pass, see my /etc/network/interfaces:
Code: 
auto eno1np0
iface eno1np0 inet manual


auto eno1np1
iface eno1np1 inet manual


auto bond0
iface bond0 inet manual
        bond-slaves eno1np0 eno1np1
        bond-miimon 100
        bond-mode 802.3ad
        bond-xmit-hash-policy layer2+3


auto vmbr0
iface vmbr0 inet static
        address 192.168.60.11/24
        gateway 192.168.60.1
        bridge-ports bond0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 0-4094

On the switch side (unifi): I made an aggregation for the 2 ports that connects to these NICs, I have assigned the homelab VLAN for the native VLAN (60):
1724460712162.png

so far so good, the host gets his IP in the 192.168.60.0/24 subnet and I can ping and so forth.

My first few VMS (intended to stay in the VLAN 60 ) also work perfectly, they get an ip in the VLAN 60, everything is perfect.

Now, I would like to have one VM (ubuntu server 24.04) on that proxmox host that resides in my default VLAN (1).


If I configure the network of the VLAN as bridge with VLAN tag=1, the VM doesn't get an IP. If I don't tag a VLAN, it gets the default VLAN 60.
1724461199808.png

vm is not getting the default VLAN IP:
1724461286315.png

Worse case scenario, I will break the bond on the host and have one NIC on default VLAN and the other on the homelab one (60) but that seems dumb and is only a solution for 2 VLANs...

Any help would be very much appreciated.
 
Last edited:
is the default VLAN of vmbr0 still 1 (PVID 1) ? Should be 60 too, if...

Code: 
:~# bridge vlan show | grep vmbr0 | grep Untagged
vmbr0             1 PVID Egress Untagged
 
vlan 1 (0 too for diff reasons) are special cases and linux bridges and/or some switches do not work well using it tagged. one of the reasons bridge-vids 2-4094 is the the default and I assume you manually edited to bridge-vids 0-4094 .

Suggest moving to the way Proxmox documentation states.
Example: Use VLAN 5 for the Proxmox VE management IP with VLAN aware Linux bridge
1. make vlan 1 the native vlan on the unifi switch bond
2. change /etc/network/interfaces
  • Code: 
    auto eno1np0
iface eno1np0 inet manual


auto eno1np1
iface eno1np1 inet manual


auto bond0
iface bond0 inet manual
        bond-slaves eno1np0 eno1np1
        bond-miimon 100
        bond-mode 802.3ad
        bond-xmit-hash-policy layer2+3

auto vmbr0.60
iface vmbr0.60 inet static
        address 192.168.60.11/24
        gateway 192.168.60.1

auto vmbr0
iface vmbr0 inet manual
        bridge-ports bond0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 2-4094
  • Use vmbr0.60 as the Bridgeport for all VM/LXC you want in HOMELAB vlan60 (no vlan tag required on the Proxmox side network device)
  • Use vmbr0 as the Bridgeport for all VM/LXC you want in the default vlan1, i.e. the new Ubuntu VM (again no vlan tag in the VM/LXC network device)
 
  • Like
Reactions: aschrijver
vesalius said:
vlan 1 (0 too for diff reasons) are special cases and linux bridges and/or some switches do not work well using it tagged. one of the reasons bridge-vids 2-4094 is the the default and I assume you manually edited to bridge-vids 0-4094 .

Suggest moving to the way Proxmox documentation states.
Example: Use VLAN 5 for the Proxmox VE management IP with VLAN aware Linux bridge
1. make vlan 1 the native vlan on the unifi switch bond
2. change /etc/network/interfaces
  • Code: 
    auto eno1np0
iface eno1np0 inet manual


auto eno1np1
iface eno1np1 inet manual


auto bond0
iface bond0 inet manual
        bond-slaves eno1np0 eno1np1
        bond-miimon 100
        bond-mode 802.3ad
        bond-xmit-hash-policy layer2+3

auto vmbr0.60
iface vmbr0.60 inet static
        address 192.168.60.11/24
        gateway 192.168.60.1

auto vmbr0
iface vmbr0 inet manual
        bridge-ports bond0
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 2-4094
  • Use vmbr0.60 as the Bridgeport for all VM/LXC you want in HOMELAB vlan60 (no vlan tag required on the Proxmox side network device)
  • Use vmbr0 as the Bridgeport for all VM/LXC you want in the default vlan1, i.e. the new Ubuntu VM (again no vlan tag in the VM/LXC network device)
Click to expand...
Bingo, this worked wonders. And thanks for the explanation as well.
 
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