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Netplan, Bonding, and VLANs

Example

This is a configuration using from Ubuntu 18.04 LTS. Two Ethernet interfaces are bonded using the active-passive mode. The untagged bond0 interface is for private traffic, while a public IP address is being delivered to a tagged VLAN sub interface using VLAN 262.

The following packages are required: ifenslave and vlan

network:
  version: 2
  ethernets:
    enp1s0:
      optional: true
    enp2s0:
      optional: true
  bonds:
    bond0:
      addresses: [ 192.168.168.115/24 ]
      interfaces: [ enp1s0, enp2s0 ]
      parameters:
        mode: active-backup
        primary: enp1s0
        mii-monitor-interval: 100
        up-delay: 10000 # must be a multiple of mii-monitor-interval
#      routes:
#        - to: 10.0.0.0/8
#          via: 192.168.168.1
#        - to: 172.16.0.0/12
#          via: 192.168.168.1
#        - to: 192.168.0.0/16
#          via: 192.168.168.1
  vlans:
    bond0.262:
        id: 262
        link: bond0
        addresses: [ 1.1.1.123/28 ]
        gateway4: 1.1.1.113
        nameservers:
            search: [ servers.domain.com ]
            addresses:
            - "8.8.8.8"
            - "8.8.4.4"

systemd-networkd-wait-online.service

In Ubuntu 22.04, even though the netplan configuration is correct, the service systemd-networkd-wait-online.service will wait for 120 seconds if one of the network interfaces is not connected.

In order to get around this, one solution is to add the "--any" option to the ExecStart line:

[Unit]
Description=Wait for Network to be Configured
Documentation=man:systemd-networkd-wait-online.service(8)
DefaultDependencies=no
Conflicts=shutdown.target
Requires=systemd-networkd.service
After=systemd-networkd.service
Before=network-online.target shutdown.target

[Service]
Type=oneshot
ExecStart=/lib/systemd/systemd-networkd-wait-online --any --timeout=10
RemainAfterExit=yes

[Install]
WantedBy=network-online.target

 

References

https://www.freedesktop.org/software/systemd/man/systemd-networkd-wait-online.service.html

 

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