netplan drops routes on carrier loss

[Robert Meeter]

Our system has some statically defined network devices. Whenever a carrier loss happens, which can be due to manual network cabling changes but also due to the connected ISP's router doing a maintenance restart, the system receives a carrier loss. This results in all routes being removed. They are not added back when the carrier is regained.

I tried putting

[Match]
Name=*

[Link]
ActivationPolicy=always-up

into /etc/systemd/network/netplan-override.network.d/override.conf , but this doesn't seem to help either.

I don't see any way to specify that a carrier loss should be ignored via netplan. I suppose https://github.com/canonical/netplan/pull/34 introduced this for bridge devices.

I'm actually surprised this isn't a bigger issue to people since.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: netplan.io 0.102-0ubuntu1~20.04.2
ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106
Uname: Linux 5.4.0-73-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.17
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun May 16 13:45:22 2021
SourcePackage: netplan.io
UpgradeStatus: Upgraded to focal on 2020-12-25 (141 days ago)

[Lukas Märdian (slyon)]

I think this should be fixed as of netplan v0.104: https://github.com/canonical/netplan/pull/215

Could you please try to confirm this, using a "ignore-carrier: true" setting?

[Launchpad Janitor (janitor)]

[Expired for netplan.io (Ubuntu) because there has been no activity for 60 days.]