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Date:      Fri, 13 Jul 2018 20:24:48 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 229727] On install, Broadcom chipset doesn't receive DHCPOFFER
Message-ID:  <bug-229727-7501-pb9iyk45BW@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-229727-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-229727-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D229727

--- Comment #10 from Rodney W. Grimes <rgrimes@FreeBSD.org> ---
(In reply to Stephan Neuhaus from comment #8)
What concerns me is that you can get the dhcp request, the dhcp reply goes =
out,
the machine receives it, then in the process of setting the NIC values it d=
rops
carrier on the link, and the switch goes back through a STP retrain process,
during which time your port looks dead.

Realize any time your port drops link status your going to have about a 50
second dead time for STP to go through the blocking(20s), listening(15s),
learning(15s) transition before it properly passes traffic again.  This is
usually long enough to cause all sorts of heartache.

--=20
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