Add VLAN to Ubuntu

How-To: Linux Networking

Recently i ended up in a corner case where I needed to bridge a VM in Virtualbox in a different VLAN than my Host Machine. This is how I accomplished it.

Step 1: Switch Configuration

The switchport needs to be a tagged port with the untagged VLAN matching the VLAN dedicated to the Host Machine. This is an example config from a Cisco Switch:

interface GigabitEthernet0/2
 description Desktop
 switchport trunk allowed vlan 10,120
 switchport trunk native vlan 10
 switchport mode trunk

Note: Allowed VLAN list is optional

Step 2: Edit Netplan

Assumption is that networkd is being used rather than Network Manager. Here is the complete configuration for clarity:

network:
  version: 2
  renderer: networkd # Netplan instead of NetworkManager  
  ethernets:
    eno1: #Check what interfaces are called with "ip add"  
      dhcp4: yes
      dhcp6: no
      accept-ra: yes #Enable SLAAC  
      ipv6-privacy: yes #Enable IPv6 Privacy Extension

  vlans:
    vlan.120:
      id: 120
      link: eno1

Note: you could add addresses, routes or whatever you want under the VLAN. It’s just not relevant in my use-case.

Step 3: Edit the VM Network Settings

Now you can choose vlan 120 as the bridged network

Source: https://askubuntu.com/questions/992428/netplan-with-multiple-vlans-on-single-interface-help-needed

Appendix

This was the goal all along:

Enable copy/paste clipboard content from Host-OS to Guest-OS and vice-versa:

https://www.howtogeek.com/187535/how-to-copy-and-paste-between-a-virtualbox-host-machine-and-a-guest-machine/