Ubuntu
systemd package

can't add more than ~1024 IP addresses

Bug #1993105 reported by TomaszChmielewski
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
netplan
Invalid
Undecided
Unassigned
systemd
Unknown
Unknown
systemd (Ubuntu)
Triaged
Low
Unassigned

Bug Description

I've migrated from Debian (using /etc/network/interfaces) to Ubuntu 22.04 (using netplan). To my surprise, it's not possible to add more than 1024 IP addresses using netplan.

It errors in syslog with:

Oct 17 07:19:50 ktsend11 systemd-networkd[678]: /run/systemd/network/10-netplan-ens192.network:3299: Failed to allocate new address, ignoring assignment: Argument list too long
Oct 17 07:19:50 ktsend11 systemd-networkd[678]: /run/systemd/network/10-netplan-ens192.network:3300: Failed to allocate new address, ignoring assignment: Argument list too long
Oct 17 07:19:50 ktsend11 systemd-networkd[678]: /run/systemd/network/10-netplan-ens192.network:3301: Failed to allocate new address, ignoring assignment: Argument list too long
Oct 17 07:19:50 ktsend11 systemd-networkd[678]: /run/systemd/network/10-netplan-ens192.network:3302: Failed to allocate new address, ignoring assignment: Argument list too long

As a result, only around 1024 IPs are present in the system:

# ip addr|grep -c inet
1027

See original description
TomaszChmielewski (mangoo-wpkg)
information type: Private Security → Public
description: updated
Revision history for this message
TomaszChmielewski (mangoo-wpkg) wrote :

The actual bug is in systemd:

https://github.com/systemd/systemd/issues/24852

A workaround is to use network-manager:

# apt install network-manager

Then in /etc/netplan/*yaml config files containing many IPs - use:

network:
  renderer: NetworkManager # <------ this
  version: 2
  ethernets:
    eth0:
      addresses:

Revision history for this message
Lukas Märdian (slyon) wrote :

Thank you for your investigation Thomasz, I've assigned the bug to the systemd project instead of netplan.

Changed in netplan:
status: New → Invalid
Changed in systemd (Ubuntu):
status: New → Triaged
importance: Undecided → Low
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