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Date: Fri, 23 Aug 2013 15:23:22 +0800
From: Julian Elischer <julian@freebsd.org>
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To: Hiroki Sato <hrs@FreeBSD.org>
Subject: Re: CFR: FIB handling improvements
References: <CADBaqmi6c7v8ojry8uViRi9tK18n8_RaDrP+UjvcmEN9guWm3w@mail.gmail.com>
 <20130822.032022.481255110184207810.hrs@allbsd.org>
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On 8/22/13 2:20 AM, Hiroki Sato wrote:
> Will Andrews <will@firepipe.net> wrote
>    in <CADBaqmi6c7v8ojry8uViRi9tK18n8_RaDrP+UjvcmEN9guWm3w@mail.gmail.com>:
>
> wi> * Always add loopback routes for non-zero FIBs, for both IPv4 and
> wi> IPv6.  Arguably, this could be a policy issue, but it is currently
> wi> less-than-trivial to specify (in rc.conf) that a route needs to be
> wi> applied to every FIB.
>
>   I am not sure why this is needed.  Are the loopback host routes
>   installed into all of the FIBs automatically when lo0 is initialized?
>
>   Even if it is required, get_fibmod() is not necessary.  The following
>   should work:
>
>   # route add -inet 127.0.0.1/8 -iface lo0 -fib all
>
I agree that this one bothers me.
I think that you are making assumptions about what the user will want.
POLA in my experience is that an empty FIB starts out EMPTY,
unless you *specify* it should be initialized with all the interface 
routes, in which case lo0
should be done as well.