Steve,
It seems that unconditional enablement and start of networkd in
src:systemd.postinst has side-effects, especially when netwokr-manager
is directly managing desktop systems, without netplan.
I think we should not unconditially enable and start entworkd in
src:systemd.postinst, and instead have networkd enable baked into cloud-
images and/or done by netcfg or the netplan generator on boot.
** Changed in: systemd (Ubuntu)
Assignee: (unassigned) => Steve Langasek (vorlon)
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https://bugs.launchpad.net/bugs/1713226
Title:
systemd-networkd messes up networking
Status in network-manager package in Ubuntu:
New
Status in nplan package in Ubuntu:
New
Status in systemd package in Ubuntu:
New
Bug description:
Since systemd-234-2ubuntu8 systemd-networkd is enabled by default.
This causes problems existing configurations
ex1: if the network has ipv6 enables (the host recieves a router
advertisement), networkmanager does not configure the network anymore so you
get only ipv6 and no ipv4 connections (since systemd-networkd seems to bring
only the link up)
ex2: if you use systemd-nspawn and configured static ip addresses in
/etc/network/interfaces, systemd-networkd adds a dhcp obtained address
on the host0 adapter and a 169.254 address
For the average user both is not expected, so my solution was
systemctl disable systemd-networkd, but since you seem to insist
having this enabled, it must be made sure systemd-networkd does not
touch existing configurations.
My suggestion is:
1) if /etc/network/interfaces contains anything other than lo -> do not
enable systemd-networkd
2) if network-manager is enabled, systemd-networkd must be disabled and vice
versa
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