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Date:      Sun, 22 Jul 2018 17:03:03 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 229957] [epair] MAC addresses all the same, no randomness
Message-ID:  <bug-229957-7501-bZnV6lzkKW@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-229957-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-229957-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229957

--- Comment #1 from Eugene Grosbein <eugen@freebsd.org> ---
Please describe how do you create your jail and, more important, how do you
create epairs and move their parts to distinct VNET. The order is important,
too.

After https://svnweb.freebsd.org/base?view=3Drevision&revision=3D334094 the=
re may
be no randomness in assigning MAC address to epair if current hostid is not
zero while epair is being created. Instead, the MAC address is determined by
hostid and interface index. If you create single epair within some VNET and=
 it
gets some interface index and MAC but you move it to another VNET then crea=
te
next epair, it may get same interface index (?) and same hostid, so same MAC
address.

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