*** This bug is a duplicate of bug 2037667 ***
https://bugs.launchpad.net/bugs/2037667
This sounds like a duplicate of 2037667, which is planned to be fixed
sometime soon-ish.
** This bug has been marked a duplicate of bug 2037667
Regression on Jammy's kernel 5.15 when creating ip6gre and vti6 tunnels
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https://bugs.launchpad.net/bugs/2049234
Title:
non-Ethernet tunnel interface creation fails on jammy 5.15.0-81 or
later
Status in linux package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Bug description:
jammy kernel 5.15.0-81.90 includes the following backport:
https://github.com/torvalds/linux/commit/b0ad3c179059089d809b477a1d445c1183a7b8fe
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/jammy/commit/?h=Ubuntu-5.15.0-91.101&id=1dcafa2582f335f0d929f3e9e736775a95271c43
https://bugs.launchpad.net/bugs/2029401
This causes creation of ip6tnl tunnel interface to fail through
systemd-networkd. The following systemd commit also has to be applied
to jammy:
https://github.com/systemd/systemd/commit/3be64aa462642de9fbe9f95536f8d167c19994bb
(Other commits might be required along with above)
Since the systemd commit is missing on jammy, Kind=ip6tnl netdev
configuration fails as follows:
> eno1: Could not create stacked netdev: Invalid argument
I believe this is a regression; We encountered this linux-
image-5.15.0-91-generic installed via unattended-upgrade -- Also
EINVAL during creating tunnel interfaces let AcceptIPv6RA function not
to start, so we lose connection to our server due to missing IP
address.
```
# eno1.network
[Match]
Name=eno1
[Network]
Tunnel=test_tun
```
```
# test_tun.netdev
[NetDev]
Name=test_tun
Kind=ip6tnl
[Tunnel]
Local=2001:db8::a
Remote=2001:db8::b
Mode=any
```
```
# test_tun.network
[Match]
Name=test_tun
[Network]
Address=10.0.0.1/24
```
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