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Date:      Tue, 2 Jun 2009 10:54:03 -0500
From:      Brooks Davis <brooks@freebsd.org>
To:        Matthew Seaman <m.seaman@infracaninophile.co.uk>
Cc:        freebsd-rc@freebsd.org, Doug Barton <dougb@dougbarton.us>
Subject:   Re: Removal of deprecation for network_interfaces != AUTO
Message-ID:  <20090602155403.GF14685@lor.one-eyed-alien.net>
In-Reply-To: <4A24B99B.9050703@infracaninophile.co.uk>
References:  <4A21A4F6.5060709@dougbarton.us> <20090601212506.GA2351@lor.one-eyed-alien.net> <4A24B99B.9050703@infracaninophile.co.uk>

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On Tue, Jun 02, 2009 at 06:33:15AM +0100, Matthew Seaman wrote:
> Brooks Davis wrote:
>=20
>> I've never seen a valid use case, just failures to understand the
>> current system.
>=20
> My laptop has iwi0 and bge0 interfaces.  At work, both of these obtain
> addresses and default routes by DHCP, but from two completely different D=
HCP
> servers.  When I'm plugged into the wired network I want the bge0 interfa=
ce to
> be the default route, but iwi0 comes first in the list of interfaces prod=
uced
> by ifconfig, so it gets configured first and sets the route.  Of course, =
when
> I'm not plugged into the wired network I want iwi0 to have the default ro=
ute,
> so I can't just use dhclient.conf to disregard routing information on that
> interface.
>=20
> All in all, setting network_interfaces=3D"bge0 iwi0 lo0" does exactly wha=
t I
> want with minimal effort.

This is an interesting use case.  This is certainly the easiest way
to do this in 7.  FYI, it won't work by default in 8.0 because we
only run dhclient from devd so there is no ordering unless you set
synchronous_dhclient=3D"YES".  What I've been thinking here is that we
should have a way to tell dhclient which interface(s) to prefer for a
default route.  I've been meaning to fix that for a while, but since
I've been using a cardbus wireless device, I've not needed to scratch
that itch.

-- Brooks

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