Bug#837759: network configuration stops working reliably

[Felipe Sateler]

Control: tags -1 moreinfo

On 14 September 2016 at 06:59, Wolfgang Walter <wolfgang.walter at stwm.de> wrote:
> Package: systemd
> Version: 231-6
> Severity: grave
>
> Starting with version 231-6 the configuration of network interfaces stops
> working reliably when rebooting a system. Downgrading to 231-5 fixes the
> problem.
>
> Symptoms: If a network interface is configured using /etc/network/interfaces
> it seems that systemd now sometimes removes the configured ip4 and/or ipv6
> addresses in the boot process. It also seems to remove routes of network
> interfaces configured manually or with /etc/network/interfaces if the link
> state changes.
>
> This seems not only be the case with interfaces configured via /etc/network/
> interfaces but with any interface one creates and assigns ip addresses
> manually.
>
> I tested this with a script:
>
> #!/bin/sh
> if [ "$1" = start ]; then
> ip link del TEST >/dev/null 2>&1 || true
> ip link add name TEST type dummy
> ip -b - <<"EOF"
> link set TEST up
> addr add 10.10.10.10/32 dev TEST nodad
> addr add 2a01:1:1:1::1/128 dev TEST nodad
> addr add 2a01:1:1:1::2/128 dev TEST nodad
> addr add 2a01:1:1:1::3/128 dev TEST nodad
> addr add 2a01:1:1:1::4/128 dev TEST nodad
> addr add 2a01:1:1:1::5/128 dev TEST nodad
> EOF
> ip addr ls TEST
> sleep 2
> elif [ "$1" = stop ]; then
> ip addr flush dev TEST
> ip link del TEST
> fi
>
> which I start with as a systemd oneshot service with
>         Before=systemd-networkd.service
>
> I can see in the journal that TEST has all adresses assigned but with 231-6 it
> looses them again (probably when systemd-networkd.service starts). With 231-5
> or earlier this in not the case.

It appears you are using systemd-networkd. Could you please attach
your networkd configuration?

Version 231-6 is built with iptables support, so that may be causing
an interaction that was not visible before.

-- 

Saludos,
Felipe Sateler