#networkd — Public Fediverse posts

Another day, another IPv6 question. I'm on a Hetzner cloud VM. I have a static IPv6 /64 subnet / prefix¹. The system uses systemd-networkd for network management.

My eth0 does not seem to receive any RA at all but I'd like to delegate the prefix downstream to a bridge interface br0 on the same host. I have an IPv6Prefix section on eth0 with the Prefix=…, Assign=yes and Token=static:::1. It works, eth0 gets the ::1 address for this prefix.

Is there a way for br0 to get this prefix too without eth0 joining the bridge? And to announce the prefix to any interfaces joining the bridge (e.g. LX system containers)?

¹ Is this the same? I have the impression these terms are used interchangeably with IPv6.

#ipv6 #systemd #networkd #systemdNetworkd

Um das Netzwerk unter #Debian zu konfigurieren scheint #systemd #networkd inzwischen definitiv das bessere Werkzeug im Vergleich zu der arg in die Jahre gekommenen ifupdown Konfiguration über /etc/network/interfaces zu sein.
Jedenfalls konnte ich damit problemlos ohne zusätzliche scripts Wake-On-LAN aktivieren und addrlabel für #IPv6 setzen.

Okay, really scary systemd-networkd moment: I replaced a lot of the #networkd config files on my server with new ones, that create bonds, bridges, etc and even move the IP address I am connected to from one of the interfaces to a bridge and move the interface onto the bridge.

I prepared the OOB connection and entered `networkctl reload` with the expectation that I will break my config.

And 2 seconds later my prompt appeared again on my SSH session. I love it when stuff magically just works.😍

@alexhaydock my intent is to educate myself about CLAT and solicit more input on how reasonable is it to do the translation with a bpf program within NM? What are your (anybody reading this) thoughts on it?

What about those using #systemd-#networkd or #connman? How does this compare to doing CLAT within userspace (via tunnel interface) or the kernel? Does CLAT really matter in GNU/Linux where the userspace is generally in better shape than Mac/Windows and we can just rebuild it?

[2/2]

Seems this is a bug in systemd-networkd unfortunately. So for now I just have to run dhclient after every suspend. https://bbs.archlinux.org/viewtopic.php?pid=2221138

#ArchLinux #Networkd

I just hope the rest of the road is smoother. Fighting for a while with configuration is pretty darn discouraging and exhausting.

I think I was spoiled with #networkd and #netplan (with networkd backend) for the most part working just the way I like, even though netplan is missing some things I need.

I'm very confused about a Linux IPv6 networking issue that I have since about half a year. Your help would be much appreciated:
https://forums.gentoo.org/viewtopic-t-1172436.html Thank you!
#linux #ipv6 #gentoo #systemd #networkd

I keep running in circles trying to fix a specific #systemd #networkd issue: how do I depend on a **specific** interface being up and configured? waiting for network-online is not an option in my case.

If you use #IPv6 on #Linux using #systemd #networkd to configure interfaces, you may want to consider adding UseMTU=no to the [IPv6AcceptRA] section. Otherwise, newer versions of #systemd may adopt an incorrect MTU set by RA advertisements. This change cost me a few days.

#NixOS abstractions are nice, but it sucks when the networkd config option you need isn't yet supported, and you can't just edit the netdev config file either because it's a read-only FS... https://github.com/NixOS/nixpkgs/pull/261726 #networkd #vlan

Apparently

1) There's a race condition between #tibyvmm and #networkd that prevents VMs from getting a DHCP reply fast enough (I'm so moving off networkd now)
and
2) cilium clustermesh is just fragile as fuck and requires manual rubbing in proper order for the clusters to regain peering.

The technology is scary.

Et routeur #Debian configuré pour utiliser la #Freebox en mode bridge avec DHCPv4 + délégation de préfixes #IPv6, cela fonctionne parfaitement ❤️
(avec #systemd-#networkd et #iptables)

Fini la tannée du setup custom pour pouvoir se passer de la #Livebox #Orange, avec en plus des IP fixes.
Je gagne aussi en débit, mais ça n'était pas l'objectif.

Bref, content ! 🙂

#networkd is so much fun. The default ubuntu setup (networkd based) won’t play nice with networkd’s own dhcp server.

Wrote some more details on my #networkd issues with #tinyvmm today: https://farcaller.net/the-woes-of-networkd/

Weird issues with #dns lately, not sure its only affecting my #opensuse #tumbleweed, but after digging the forums for a while, I really lost some trust in Opensuse after reading all the issues related to #wicked. Seems I need check how #networkd works and switch to it.

Ugh, does anyone know how to #slaac with #systemd #networkd? I am confused and not able to find much information online (probably missing some important keywords to search for). #linux #unix