[Bug 1993792] Re: Configuring IPv6 (static) causes the IPv4 (static) default route to not exist in the netplan config after install on 22.10.1

[XSpielinbox]

** Changed in: subiquity (Ubuntu)
       Status: New => Confirmed

** Changed in: subiquity
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1993792

Title:
  Configuring IPv6 (static) causes the IPv4 (static) default route to
  not exist in the netplan config after install on 22.10.1

Status in subiquity:
  Confirmed
Status in subiquity package in Ubuntu:
  Confirmed

Bug description:
  When configuring the network on Ubuntu Server 22.04 with subiquity
  22.10.1, configuring IPv6 (manual) causes the IPv4 (manual) default
  gateway to be lost and only the static IPv6 default gateway persists
  in the generated netplan configuration after install. This also
  affects the installer's network connectivity too and is noticeable
  when trying to import SSH keys from GitHub (what still is IPv4 only it
  appears, wow). Entering a shell and running `ip route` and `ip -6
  route` shows the default IPv6 route but no default v4 route, this
  persists between the installer and the install after booting into it.

  his was tested on a Proxmox VE (7.2-11) virtual machine with a virtio
  network adapter, not yet tested with other configs/hardware but I'll
  do more testing when I get home.

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