CFR: FIB handling improvements

[Alan Somers]

On Wed, Aug 21, 2013 at 3:28 PM, Will Andrews <will at firepipe.net> wrote:

> On Wed, Aug 21, 2013 at 12:20 PM, Hiroki Sato <hrs at freebsd.org> wrote:
> > 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
>
> Other places in rc.d/routing can make use of 'all' in that case.
>
> No, loopback host routes are not installed into all FIBs, only FIB 0.
> This is with rt_add_addr_allfibs == 0 (see rtinit1()), which probably
> explains why.  We could add an override for lo0 addresses, but perhaps
> this is something that should be configurable?  i.e. allow the
> administrator to specify in rc.conf which FIBs lo0's host route should
> be placed on?
>
When would you ever want lo0 to be inaccessible from some fibs?  I can't
think of any reasons.

>
> --Will.
> _______________________________________________
> freebsd-net at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to "freebsd-net-unsubscribe at freebsd.org"
>