[Bug 2092860] Re: netplan routes issue with static ipv4 and ipv6

[Chris Peterson]

** Changed in: subiquity (Ubuntu)
   Importance: Low => Medium

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Title:
  netplan routes issue with static ipv4 and ipv6

Status in Netplan:
  Invalid
Status in subiquity package in Ubuntu:
  Confirmed

Bug description:
  root at ub6:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 24.04.1 LTS
  Release: 24.04
  Codename: noble

  =====

  root at ub6:~# apt-cache policy netplan.io
  netplan.io:
    Installed: 1.0.1-1ubuntu2~24.04.1
    Candidate: 1.0.1-1ubuntu2~24.04.1
    Version table:
   *** 1.0.1-1ubuntu2~24.04.1 500
          500 http://ca.archive.ubuntu.com/ubuntu noble-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.0-2ubuntu1.2 500
          500 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages
       1.0-2ubuntu1 500
          500 http://ca.archive.ubuntu.com/ubuntu noble/main amd64 Packages

  ======

  3. I am configuring the ubuntu server on proxmox 8 via gui and setup
  ipv4 and ipv6 manually with their subnet, ip and DHCP gateway.

  a) I edited ipv4 first
  b) I edited ipv6 second

  Installed.

  I was expecting that ipv4 and ipv6 will use their own dhcp server to
  connect however this only set a single DHCP server routes default to
  the Action done on b).

  I am expecting if it should have looked like this as what is working
  for me after manual editing the yaml file.

  [code]

  network:
    version: 2
    ethernets:
      ens18:
        addresses:
          - 192.168.1.102/24
          - fd3b:14ca:3674:5011::102/64
        nameservers:
          addresses:
            - 1.1.1.1
            - 8.8.8.8
            - 2606:4700:4700::1111
            - 2001:4860:4860::8888
          search: []
        routes:
          - to: 0.0.0.0/0
            via: 192.168.1.1
          - to: ::/0
            via: fd3b:14ca:3674:5011::1

  [/code]

  4. Netplan /etc/netplan/50-cloud-init.yaml file looks like this based
  on network setting on ubuntu install via gui.

  a ) setting up ipv4 first, ipv6 second.

  network:
      ethernets:
          ens18:
              addresses:
              - 192.168.1.102/24
              - fd3b:14ca:3674:5011::102/64
              nameservers:
                  addresses:
                  - 1.1.1.1
                  - 8.8.8.8
                  - 2606:4700:4700::1111
                  - 2001:4860:4860::8888
                  search: []
              routes:
              - to: default
                  via: fd3b:14ca:3674:5011::1
      version: 2

  b ) setting up ipv6 first, ipv4 second

  network:
      ethernets:
          ens18:
              addresses:
              - fd3b:14ca:3674:5011::102/64
              - 192.168.1.102/24
              nameservers:
                  addresses:
                  - 2606:4700:4700::1111
                  - 2001:4860:4860::8888
                  - 1.1.1.1
                  - 8.8.8.8
                  search: []
              routes:
              - to: default
                  via: 192.168.1.1
      version: 2

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