Posts tagged vlan

proxmox and VLANs

posted on 2016-07-15 13:07

This is a howto with a sample configuration on how to create a proxmox setup using vlans. No bonding is used.

  • network: 10.0.0.0/24
  • gateway ip: 10.0.0.1
  • proxmox ip: 10.0.0.2
  • VM ip: 10.0.0.3
  • vlan id: 222
  • physical NIC: eth0

proxmox

Physical NIC is set to manual, also the coresponding vlan device. Also the main bridge, only the specific bridge-vlan adapter is of type inet.

Main bridge uses physical NIC, vlan-bridge used the vlan-adapter the the physical NIC.

/etc/network/interfaces:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

auto eth0.222
iface eth0.222 inet manual
    vlan-raw-device eth0

auto vmbr0
    iface vmbr0 inet manual
    bridge_ports eth0
    bridge_stp off
    bridge_fd 0

auto vmbr0v222
iface vmbr0v222 inet static
    address     10.0.0.2
    netmask     255.255.255.0
    gateway     10.0.0.1
    bridge_ports eth0.222
    bridge_stp off
    bridge_fd 0

Naming convention is ethX.VLAN for the physical NIC's VLAN adapter. For the bridge, do vmbrXvVLAN.

Set up more ethX.VLAN / vmbrXvVLAN couples for more VLANs.

VM

Setup the network as usual, as if no VLAN is in place:

auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet static
    address     10.0.0.3
    netmask     255.255.255.0
    network     10.0.0.0
    broadcast   10.0.0.255
    gateway     10.0.0.1

Also set the VLAN from withing the proxmox interface for your VM's desired adapter. (Tab Hardware in the VM's menu, double-click onto Network Device, select main bride, which is vmbr0 here, and add the VLAN id in the field VLAN Tag.)

switch

You have to have set up trunking on the physical switch's switchport that your proxmox hardware is using.

If you omit this, no vlan tagging will take place and you will have no connectivity even if your proxmox network config is solid.

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