*** This bug is a duplicate of bug 1804478 ***
https://bugs.launchpad.net/bugs/1804478
commit 223932c786ada7f758a7b7878a6ad2dae0d1e5fb was just added to
systemd in bionic via bug 1804478.
** This bug has been marked a duplicate of bug 1804478
netplan dhcp interface with no default route causes
systemd-networkd-wait-online to hang
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https://bugs.launchpad.net/bugs/1823730
Title:
Bionic: interface stuck in state "configuring" on a VM with two NICs,
DHCP, and the secondary NIC configured to ignore routes from DHCP
Status in systemd package in Ubuntu:
New
Bug description:
[Impact]
Network interfaces not using route information from DHCP4 do not reach
configured state, but remain 'configuring' on Bionic.
[Test Case]
1) Launch a VM with two network interfaces connected to ports on
distinct network, each configured using DHCP4.
2) Configure systemd-networkd to set up both interfaces via DHCP, but to
ignore DHCP route information (plus possibly other system wide configuration
supposed to be unambiguous, like DNS) from secondary interface. You can do so
* either directly in /etc/systemd/network/, as shown in
https://github.com/systemd/systemd/issues/9289,
* or via netplan.io 0.96-0ubuntu0.18.04.2, as shown in
https://bugs.launchpad.net/netplan/+bug/1759014/comments/48.
3) Reboot.
4) Both interfaces should now be reported as configured:
# networkctl -a
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 ens3 ether routable configured
3 ens4 ether routable configured
3 links listed.
[Other Info]
The issue is known for systemd releases before 239, and was fixed with
https://github.com/systemd/systemd/commit/223932c786ada7f758a7b7878a6ad2dae0d1e5fb.
I have tested it by manually merging that fix into sources of systemd
237-3ubuntu10.15, rebuilding and installing the package. Worked fine.
See also https://bugs.launchpad.net/netplan/+bug/1759014 and
https://bugs.launchpad.net/netplan/+bug/1776228.
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