On Fri, Oct 25, 2019 at 1:31 PM Dan Streetman <ddstr...@canonical.com>
wrote:

> I looked at this for a few minutes, and it seems strange that it works
> at all (at boot) since networkd sets the ipv6 mtu before bringing the
> link up, but the kernel resets the ipv6 mtu to the device mtu on link
> up.  I must be missing something.
>

I'm glad you saw that.  I'm seeing this as well on my curtin vmtest
(automated deployment and data collection during first boot).

I have to restart networkd for it to work on the first boot.
Subsequent boots it seems to work fine without a restart of networkd.


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> https://bugs.launchpad.net/bugs/1671951
>
> Title:
>   networkd should allow configuring IPV6 MTU
>
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https://bugs.launchpad.net/bugs/1671951

Title:
  networkd should allow configuring IPV6 MTU

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