Re: debug systemd restart networking problem

[john doe <johndoe65534@mail.com>]

On 3/26/2022 2:15 PM, Jeremy Ardley wrote:
> I have been doing various changes to my network but have now got to the
> stage where I have errors running
>
> systemd restart networking
>
> systemctl status networking
> ● networking.service - Raise network interfaces
>       Loaded: loaded (/lib/systemd/system/networking.service; enabled;
> vendor preset: enabled)
>      Drop-In: /etc/systemd/system/networking.service.d
>               └─override.conf
>       Active: failed (Result: exit-code) since Sat 2022-03-26 20:50:03
> AWST; 13min ago
>         Docs: man:interfaces(5)
>     Main PID: 1935 (code=exited, status=1/FAILURE)
>          CPU: 326m
>
> cat /etc/network/interfaces
> source /etc/network/interfaces.d/*
>
> auto lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet dhcp
>
> iface eth0 inet6 dhcp
>      request_prefix 1
>      accept_ra 2
>
> auto lan0
>
> iface lan0 inet static
>          address 10.31.40.1/24
>
> iface lan0 inet static
>          address 10.31.40.5/24
>
> iface lan0 inet6 static
>          address <redacted>::1/64
>
> iface lan0 inet6 static
>          address <redacted>::5/64
>
>
> I check the interfaces using ip a I see all the ipv4 interfaces as
> configured in /etc/network/interfaces but none of the ipv6 ones. I do
> have ipv6 though as lan0 has has an fe80 address
>
> I have tried a lot of things to debug this but no luck. e.g.
>
> systemctl edit networking.service command
>
> [Service]
> # remove existing ExecStart rule
> ExecStart=
> # start ifup with verbose option
> ExecStart=/sbin/ifup -av

Does it change anything if you reboot ('systemctl reboot')?

What are you seeing in the logs?

--
John Doe