Arch Linux

blochl

Member

Registered: 2018-08-31

Posts: 77

No internet after systemd upgrade 248 -> 249

Hi,

After systemd was updated to 249, I stopped getting an IP on my network interfaces (I use systemd-networkd as my network manager). Since then, I was downgrading to 248.3 manually after each update(*), and with it the network is okay. Did anyone else encounter this? Any ideas?

*:

sudo pacman -U /var/cache/pacman/pkg/systemd-248.3-2-x86_64.pkg.tar.zst /var/cache/pacman/pkg/systemd-libs-248.3-2-x86_64.pkg.tar.zst /var/cache/pacman/pkg/systemd-sysvcompat-248.3-2-x86_64.pkg.tar.zst

blochl

Member

Registered: 2018-08-31

Posts: 77

Re: No internet after systemd upgrade 248 -> 249

Ping?

positronik

Member

Registered: 2016-02-08

Posts: 95

Re: No internet after systemd upgrade 248 -> 249

I would have a thorough look at the configuration files especially for typos in the variable names

Khere

Member

From: Italy

Registered: 2020-03-04

Posts: 170

Re: No internet after systemd upgrade 248 -> 249

Post the output of

sudo systemctl status dhcpcd.service

May the update had disabled it.
Also post

sudo systemctl status NetworkManager.service

Last edited by Khere (2021-07-28 15:06:01)

---

Fan of Giorgio Moroder & Mohammad Ammax enemy

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,310

Re: No internet after systemd upgrade 248 -> 249

Check your journal on whether there are errors obvious differences with regards to systemd-networkd between the two versions. Just from the changelog something obbvious I'd check is whether you still have the same interface name: https://github.com/systemd/systemd/blob/v249/NEWS#L107

snakeroot

Member

Registered: 2012-10-06

Posts: 177

Re: No internet after systemd upgrade 248 -> 249

@Khere: You're assuming OP is using dchpd as versus systemd's built in DHCP client and is using Network Manager.

The output of networkctl status might be interesting.

blochl

Member

Registered: 2018-08-31

Posts: 77

Re: No internet after systemd upgrade 248 -> 249

Thanks for your replies. Unfortunately, they didn't bring me closer to a solution:

* The configuration files did not change:

$ cat /etc/systemd/network/br0.network
[Match]
Name=br0

[Network]
DHCP=ipv4
$ cat /etc/systemd/network/20-eno1.network
[Match]
Name=eno1

[Network]
DHCP=ipv4

* I don't use NetworkManager, nor dhcpcd:

$ systemctl status dhcpcd.service
○ dhcpcd.service - dhcpcd on all interfaces
     Loaded: loaded (/usr/lib/systemd/system/dhcpcd.service; disabled; vendor preset: disabled)
     Active: inactive (dead)
$ systemctl status NetworkManager.service
Unit NetworkManager.service could not be found.

* The output of `systemctl status systemd-networkd.service` looks normal:

● systemd-networkd.service - Network Configuration
     Loaded: loaded (/usr/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2021-07-29 09:53:06 IDT; 1min 10s ago
TriggeredBy: ● systemd-networkd.socket
       Docs: man:systemd-networkd.service(8)
   Main PID: 451 (systemd-network)
     Status: "Processing requests..."
      Tasks: 1 (limit: 19072)
     Memory: 2.8M
        CPU: 27ms
     CGroup: /system.slice/systemd-networkd.service
             └─451 /usr/lib/systemd/systemd-networkd

Jul 29 09:53:05 lb-desktop systemd[1]: Starting Network Configuration...
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: lo: Link UP
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: lo: Gained carrier
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: Enumeration completed
Jul 29 09:53:06 lb-desktop systemd[1]: Started Network Configuration.
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: eno1: Interface name change detected, renamed to eth0.
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: eth0: Interface name change detected, renamed to eno1.
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: br0: Link UP
Jul 29 09:53:06 lb-desktop systemd-networkd[451]: br0: Gained carrier
Jul 29 09:53:08 lb-desktop systemd-networkd[451]: br0: Gained IPv6LL

* The names of the interfaces did not change.
* When the network is working (with systemd 248) the output of `systemctl status systemd-networkd.service` includes just one more line:

Jul 29 10:07:17 lb-desktop systemd-networkd[444]: br0: DHCPv4 address 192.168.90.53/24 via 192.168.90.254

* Running `dhcpcd` manually on br0 does not help.

blochl

Member

Registered: 2018-08-31

Posts: 77

Re: No internet after systemd upgrade 248 -> 249

Okay, I found the problematic lines in the logs: when there is no network (systemd 249) there are these lines there:

Jul 29 10:25:35 lb-desktop systemd-networkd[438]: eno1: Failed to set master interface: Operation not supported
Jul 29 10:25:35 lb-desktop systemd-networkd[438]: eno1: Failed

I also see now that on rare occasions I do get an IP even with systemd 249, and then these lines do not appear. On systemd 248 I always have network, and these lines never appear.

I should point out that I use OpenVswitch, with the following configuration:

$ sudo ovs-vsctl show
7400290d-588e-4a24-9267-efde42fd4cb1
    Bridge br0
        Port eno1
            Interface eno1
        Port br0
            Interface br0
                type: internal

I found the relevant issue on systemd issue tracker: https://github.com/systemd/systemd/issues/20241