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Description of problem:

As described in https://bugzilla.redhat.com/show_bug.cgi?id=1724795 a new option "vlansrc" is being added to hashing options in kernel. Nmstate should support it.

The details can be found in the patch https://www.spinics.net/lists/kernel/msg3775505.html

Patch merged upstream. I cannot attach it because bugzilla is throwing an error. https://github.com/nispor/nispor/pull/110

Verified with versions:
nmstate-1.0.2-0.1.el8.noarch
nispor-1.0.1-3.el8.x86_64
NetworkManager-1.30.0-0.9.el8.x86_64

See this attachment for details: https://bugzilla.redhat.com/show_bug.cgi?id=1915459#c11

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (nispor bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2021:1768