[systemd-bugs] [Bug 89197] New: systemd-networkd: ip6tnl does not set MTU correctly without reboot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89197

            Bug ID: 89197
           Summary: systemd-networkd: ip6tnl does not set MTU correctly
                    without reboot
           Product: systemd
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: nils at nilsschneider.net
        QA Contact: systemd-bugs at lists.freedesktop.org

Using systemd v219 when defining an ip6tnl .netdev MTUBytes is not honoured
except when the netdev is created at boot time.

Observe the MTU being set to 1452 even though 1337 is specified. After reboot,
the MTU is set correctly.

# cat ip6tnl-test.netdev 
[NetDev]
Name=ip6tnl-test
Kind=ip6tnl
MTUBytes=1337

[Tunnel]
Mode=ip6ip6
Local=2001:db8::1
Remote=2001:db8::2
# systemctl restart systemd-networkd
# ip link show ip6tnl-test
17: ip6tnl-test at eth0: <POINTOPOINT,NOARP> mtu 1452 qdisc noop state DOWN mode
DEFAULT group default 
    link/tunnel6 2001:db8::1 peer 2001:db8::2
# reboot
Connection closed.
% ssh host
# ip link show ip6tnl-test
12: ip6tnl-test at eth0: <POINTOPOINT,NOARP> mtu 1337 qdisc noop state DOWN mode
DEFAULT group default 
    link/tunnel6 2001:db8::1 peer 2001:db8::2

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/systemd-bugs/attachments/20150218/5eccb46f/attachment.html>