Is this still an issue? If so, can you please enable debug logs on
systemd-networkd, and then reboot, and attach those recent logs?
$ systemctl edit systemd-networkd.service
# Add the following when the editor opens:
[Service]
Environment=SYSTEMD_LOG_LEVEL=debug
$ reboot
[...]
$ journalctl -b -u systemd-networkd.service > logs.txt
** Changed in: systemd (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1929101
Title:
systemd-networkd can't set ip6tnl interface mode as any
Status in systemd package in Ubuntu:
Incomplete
Bug description:
systemd-networkd provides "Mode=" configuration for a virtual device
of "Kind=ip6tnl". But setting mode to "any" doesn't work, tunnel mode
stay as ipv6/ipv6:
20/05/21 18:08:33 darkyman@mnt-myt-focal ~ > ip -6 tun show
ip6tnl0: ipv6/ipv6 remote :: local :: encaplimit 0 hoplimit inherit tclass
0x00 flowlabel 0x00000 (flowinfo 0x00000000)
I'm expecting it to be in any/ipv6 mode like:
ip6tnl0: any/ipv6 remote :: local :: encaplimit 0 hoplimit inherit
tclass 0x00 flowlabel 0x00000 (flowinfo 0x00000000)
Config file attached (00-ip6tnl0.netdev), I'm using systemd `systemd 245
(245.4-4ubuntu3.6)` on a `Ubuntu 20.04.2 LTS`.
Currently I'm using systemd service as a workaround this issue, which sets
mode to "any" by calling
/usr/sbin/ip -6 tunnel change ip6tnl0 mode any
And that's what networkctl thinks about this tunnel interface
● 7: ip6tnl0
Link File: /usr/lib/systemd/network/99-default.link
Network File: /etc/systemd/network/01-ip6tnl0.network
Type: tunnel6
State: degraded (configured)
MTU: 9000 (min: 68, max: 65407)
Queue Length (Tx/Rx): 1/1
Address: fe80::3063:1eff:febf:8aaa
May 20 17:55:36 mnt-myt-focal.example.com systemd-udevd[1062]: ip6tnl0: Could
not generate persistent MAC: No data available
May 20 17:55:36 mnt-myt-focal.example.com systemd-networkd[1008]: ip6tnl0:
netdev ready
May 20 17:55:36 mnt-myt-focal.example.com systemd-networkd[1008]: ip6tnl0:
netdev could not be created: Invalid argument
May 20 17:55:36 mnt-myt-focal.example.com systemd-networkd[1008]: ip6tnl0:
IPv6 successfully enabled
May 20 17:55:36 mnt-myt-focal.example.com systemd-networkd[1008]: ip6tnl0:
Link UP
May 20 17:55:36 mnt-myt-focal.example.com systemd-networkd[1008]: ip6tnl0:
Gained carrier
May 20 17:55:36 mnt-myt-focal.example.com systemd-networkd[1008]: ip6tnl0:
Gained IPv6LL
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