Hi all and thanks a lot for all your work on systemd! I'm trying to setup a VXLAN configuration with multicast with systemd-networkd but struggle to make it work. What I'm trying to replicate is the following (working command):
ip link add vxlan100 type vxlan id 100 dstport 4789 local 10.100.200.4 group 224.4.0.144 dev lo ttl 5 (this command fails without specifying 'dev lo') My config file, vxlan100.netdev: [NetDev] Name=vxlan100 Kind=vxlan [VXLAN] VNI=100 TTL=5 DestinationPort=4789 Group=224.0.0.144 Local=10.100.200.4 Independent=true journalctl -u systemd-networkd (debug log enabled): systemd-networkd[1520509]: vxlan100: loaded vxlan systemd-networkd[1520509]: vxlan100: Using MAC address: [snip XYZ] systemd-networkd[1520509]: vxlan100: Creating systemd-networkd[1520509]: Failed to read $container of PID 1, ignoring: Permission denied systemd-networkd[1520509]: Found cgroup on /sys/fs/cgroup/systemd, legacy hierarchy systemd-networkd[1520509]: Found container virtualization none. systemd-networkd[1520509]: No virtualization found in DMI vendor table. systemd-networkd[1520509]: Unable to read /sys/firmware/dmi/entries/0-0/raw, using the virtualization information found in DMI vendor table, ignoring: Permission d> systemd-networkd[1520509]: UML virtualization not found in /proc/cpuinfo. systemd-networkd[1520509]: Virtualization XEN not found, /proc/xen does not exist systemd-networkd[1520509]: No virtualization found in CPUID systemd-networkd[1520509]: This platform does not support /proc/device-tree systemd-networkd[1520509]: This platform does not support /proc/sysinfo systemd-networkd[1520509]: Found VM virtualization none systemd-networkd[1520509]: /usr/lib/systemd/network/80-container-host0.network: Conditions in the file do not match the system environment, skipping. [snip] systemd-networkd[1520509]: vxlan100: netdev could not be created: Invalid argument As seen in the last line of the log, it throws an invalid argument error and no VXLAN device is created. This does not happen if I remove the "Group=" part in the configuration. As mentioned above, the "ip add link" command needs a "dev=" argument to work but I have not found a way to specify a device in the netdev config file... I have also tried it without Independent=true and having a network file instead with VXLAN=vxlan100, but then it just silently fails without log output. What am I doing wrong or is it a bug? My system: Linux 4.18.0-372.32.1.el8_6.x86_64 #1 SMP Tue Oct 25 05:53:57 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux AlmaLinux release 8.7 (Stone Smilodon) systemd: systemd 239 (239-68.el8) +PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=legacy Thanks a lot for your help and kind regards, Lukas Wolf