[Bug 194855] VLAN interface MTU does not change on changing the base interface MTU

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194855

John Nielsen <john at jnielsen.net> changed:

           What    |Removed                     |Added
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                 CC|                            |john at jnielsen.net

--- Comment #1 from John Nielsen <john at jnielsen.net> ---
I don't think that VLAN MTU should change automatically. In the example given
it does make sense to either give a warning or prevent the parent interface MTU
from being reduced smaller than any of the VLAN MTU (or conversely increasing
the VLAN MTU above that of the parent), but I don't think that increasing the
MTU on the parent should have any effect on the VLAN interfaces' MTU. I have
certainly had cases where I used different MTU settings for different VLANs on
the same parent interface (but of course not higher than the parent).

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