systemd-networkd silently fails to set vxlan multicast group

Bug #1903300 reported by Martin Sofaru on 2020-11-06
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Fix Released
systemd (Ubuntu)
Dan Streetman

Bug Description


setting VXLAN.Group does not correctly configure multicast group

[test case]

taken from upstream bug, example networkd config:



After restarting systemd-networkd the VXLAN device is created, but the group address is not assigned. Use ip -d link show myvx and networkctl show myvx to verify.

[regression potential]

any regression would likely cause problems only with VXLAN netdevs created by networkd.


this is needed only for f.

this was introduced by upstream commit 83cb24ac20b which was first in v243, so this bug does not exist in b and earlier.

this was fixed by upstream commit 7c9b26900cc33daf080627daf5904de74c1ef267 (and two following commits) which were first included in v246, so this is already fixed in g and later.

[original description]

Fixed upstream, please include [1].

Thank you.


ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: systemd 245.4-4ubuntu3.3
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.11
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Nov 6 14:16:19 2020
MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-52-generic root=UUID=97786d27-c04a-4592-a087-f19a689468a9 ro console=tty1 console=ttyS0
SourcePackage: systemd
UpgradeStatus: Upgraded to focal on 2020-08-27 (70 days ago) 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-q35-5.1
dmi.modalias:,2009):pvrpc-q35-5.1:cvnQEMU:ct1:cvrpc-q35-5.1: Standard PC (Q35 + ICH9, 2009)
dmi.product.version: pc-q35-5.1
dmi.sys.vendor: QEMU

Martin Sofaru (msofaru) wrote :
summary: - systemd-networkd fails to set vxlan multicast group
+ systemd-networkd silently fails to set vxlan multicast group
Changed in systemd:
status: Unknown → Fix Released
Dan Streetman (ddstreet) on 2020-12-14
description: updated
Changed in systemd (Ubuntu):
status: New → Fix Released
Changed in systemd (Ubuntu Focal):
status: New → In Progress
importance: Undecided → Medium
assignee: nobody → Dan Streetman (ddstreet)

Hello Martin, or anyone else affected,

Accepted systemd into focal-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in systemd (Ubuntu Focal):
status: In Progress → Fix Committed
tags: added: verification-needed verification-needed-focal

All autopkgtests for the newly accepted systemd (245.4-4ubuntu3.4) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

linux-hwe-5.8/5.8.0-37.42~20.04.1 (arm64) (amd64)
apt/2.0.2ubuntu0.2 (armhf)
munin/2.0.56-1ubuntu1 (ppc64el)
gvfs/1.44.1-1ubuntu1 (amd64, arm64)
prometheus-alertmanager/0.15.3+ds-3ubuntu1 (armhf)
lxc/1:4.0.2-0ubuntu1 (amd64)
indicator-session/17.3.20+19.10.20190921-0ubuntu1 (ppc64el)
pyudev/0.21.0-3ubuntu1 (s390x)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].


Thank you!

Martin Sofaru (msofaru) wrote :

Hello Chris,

i can confirm, that after installing packages:

the mcast group is set properly for the vxlan interface.

Thank you!


Dan Streetman (ddstreet) on 2021-01-13
tags: added: verification-done verification-done-focal
removed: verification-needed verification-needed-focal
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package systemd - 245.4-4ubuntu3.4

systemd (245.4-4ubuntu3.4) focal; urgency=medium

  * d/p/lp1905245/0001-basic-cap-list-parse-print-numerical-capabilities.patch,
    - print number of unknown capabilities instead of failing
      (LP: #1905245)
  * d/p/lp1890448-hwdb-Add-EliteBook-to-use-micmute-hotkey.patch:
    Add EliteBook to use micmute hotkey (LP: #1890448)
  * d/extra/dhclient-enter-resolved-hook:
    suppress output of cmp command in dhclient hook (LP: #1878955)
  * d/p/lp1905044-test-use-cap_last_cap-for-max-supported-cap-number-n.patch:
    test: use cap_last_cap() instead of capability_list_length()
    (LP: #1905044)
  * d/p/lp1903300/0001-network-VXLan-fix-adding-Group-address.patch,
    set vxlan multicast group when specified (LP: #1903300)
  * d/p/lp1907306/0001-sd-dhcp-client-don-t-log-timeouts-if-already-expired.patch,
    Send correct number of dhcpv4 renew and rebind requests
    (LP: #1907306)
  * d/p/lp1902960-udev-re-assign-ID_NET_DRIVER-ID_NET_LINK_FILE-ID_NET.patch:
    Run net_setup_link on 'change' uevents (LP: #1902960)
  * d/t/root-unittests:
    Remove any corrupt journal files (LP: #1881947)

 -- Dan Streetman <email address hidden> Wed, 06 Jan 2021 15:47:39 -0500

Changed in systemd (Ubuntu Focal):
status: Fix Committed → Fix Released

The verification of the Stable Release Update for systemd has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

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