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I'm trying to set the static IP of a network interface on a server that has just upgraded its distro from 20.04 to 22.04. Here is the netplan /etc/netplan/80_netplan_netcfg.yaml.

network:
  version: 2
  renderer: networkd
  ethernets:
    eno3:
      dhcp4: no
      addresses: [ 169.254.20.1/16 ]

The command sudo netplan apply doesn't seem to be able to assign the static IP to eno3 anymore. Here's the output of ip a:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether a8:a1:59:f2:c4:5d brd ff:ff:ff:ff:ff:ff
    altname enp4s0f0
    inet6 2401:fa00:480:4029:aaa1:59ff:fef2:c45d/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 2591429sec preferred_lft 604229sec
    inet6 fe80::aaa1:59ff:fef2:c45d/64 scope link 
       valid_lft forever preferred_lft forever

I've tried manually setting the static ip using ip a add 169.254.20.1/16 dev eno3 which initially succeeds in assigning the ip address, but somehow gets unassigned after a period of time. I'm not sure if some background process would be responsible for this, but ideally I would be able to do this with netplan.

I've been scratching my head all day about this, so any help would be appreciated!

Macondoman
  • 31

1 Answers1

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You could use

sudo netplan try

and

sudo netplan --debug apply

to find any errors.

Sometimes

sudo systemctl restart systemd-networkd

might also help to solve the problem.

Thomas Aichinger
  • 3,717