Comment 1 for bug 1881832

This is in file etc/netplan/00-installer-config.yaml (enp0s5 is configured with DHCP4, but real NIC is enp0s4...)

#####
# This is the network config written by 'subiquity'
network:
  ethernets:
    enp0s5:
      dhcp4: true
  version: 2
#####

This is visible in output from "sudo journalctl":

...
Jun 05 02:53:44 t2004 kernel: virtio_net virtio1 enp0s4: renamed from eth0
...
Jun 05 02:53:53 t2004 systemd-resolved[718]: Using system hostname 't2004'.
Jun 05 02:53:53 t2004 systemd[1]: Started Network Name Resolution.
Jun 05 02:53:53 t2004 systemd[1]: Reached target Network.
Jun 05 02:53:53 t2004 systemd[1]: Reached target Host and Network Name Lookups.
Jun 05 02:53:54 t2004 cloud-init[727]: Cloud-init v. 20.1-10-g71af48df-0ubuntu5 running 'init' at Fri, 05 Jun 2020 02:53:53 +0000. Up 15.84 seconds.
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +++++++++++++++++++++++++++Net device info++++++++++++++++++++++++++++
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +--------+-------+-----------+-----------+-------+-------------------+
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: | Device | Up | Address | Mask | Scope | Hw-Address |
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +--------+-------+-----------+-----------+-------+-------------------+
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: | enp0s4 | False | . | . | . | 00:a0:98:4f:5d:d5 |
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: | lo | True | 127.0.0.1 | 255.0.0.0 | host | . |
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: | lo | True | ::1/128 | . | host | . |
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +--------+-------+-----------+-----------+-------+-------------------+
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +++++++++++++++++++Route IPv6 info+++++++++++++++++++
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +-------+-------------+---------+-----------+-------+
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: | Route | Destination | Gateway | Interface | Flags |
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +-------+-------------+---------+-----------+-------+
Jun 05 02:53:54 t2004 cloud-init[727]: ci-info: +-------+-------------+---------+-----------+-------+
...