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Date:      Tue, 25 Oct 2011 17:02:32 +0200
From:      Miroslav Lachman <000.fbsd@quip.cz>
To:        Paul Schenkeveld <freebsd@psconsult.nl>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: ntpd couldn't resolve host name on system boot
Message-ID:  <4EA6CF88.3050600@quip.cz>
In-Reply-To: <20111025134159.GA96607@psconsult.nl>
References:  <4EA5EBB5.3090101@quip.cz> <20111024232750.GA74032@icarus.home.lan>	<B26B1B7BC38B4479B103B78B2175234D@multiplay.co.uk>	<20111025010327.GA75437@icarus.home.lan>	<20111025092012.GA41065@psconsult.nl>	<20111025125108.GA87567@icarus.home.lan> <20111025134159.GA96607@psconsult.nl>

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Paul Schenkeveld wrote:
> On Tue, Oct 25, 2011 at 05:51:08AM -0700, Jeremy Chadwick wrote:
>> On Tue, Oct 25, 2011 at 11:20:12AM +0200, Paul Schenkeveld wrote:
>>> On Mon, Oct 24, 2011 at 06:03:27PM -0700, Jeremy Chadwick wrote:
>>>> The one shortcoming of netwait is that it doesn't support waiting for
>>>> multiple NICs.  Some people have dual-homed environments where they
>>>> really would like to wait for both, say, em0 and em1, to come up and be
>>>> functional before any more scripts are started.  I left that as a
>>>> project for someone else, but it's something that should be added given
>>>> its importance.
>>>
>>> How would you like to see multiple interfaces implemented:
>>>
>>>    - All interfaces must be up at the same time
>>>    - Probe interfaces one by one, proceed to the next when an interface
>>>      up or bail out when any interface stays down until the loop times
>>>      out
>>
>> 1) Each interface should be checked in the order specified.
>> 2) Each ping probe should be done using that interface (ping -I).
>
>> From ping(8):
>
>      -I iface
> 	Source multicast packets with the given interface address.  This
> 	flag only applies if the ping destination is a multicast address.
>
> I believe that for unicast the interface used is determined by looking
> up the destination address in the routing table (unless overridden by a
> packet filter that changes the next hop).  Another way to influence the
> next hop selection and the outgoing interface is using setfib(1) but
> apart from rc.d/jail I see no fib support in rc.conf at all.

OT:
Unfortunately there are two PRs with patches to add setfib support to 
rc.subr, but both of them are laying under the dust without attention of 
committers.
conf/132483 conf/132851

I tried to bring it to attention in freebsd-rc@ without any luck. (same 
as my attempt to add support for cpuset conf/142434). So we have 
features / tools without centralized support in rc.subr and if anybody 
want to use them, must do it by some hacky ways in rc.local etc.
http://lists.freebsd.org/pipermail/freebsd-rc/2010-January/001816.html

Miroslav Lachman



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