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Date:      Thu, 6 Jun 2002 17:53:29 +0300 (EEST)
From:      Iasen Kostov <ikostov@otel.net>
To:        Marko Zec <zec@tel.fer.hr>
Cc:        Kelly Yancey <kbyanc@posi.net>, <freebsd-net@FreeBSD.ORG>
Subject:   Re: host routes for interface addresses
Message-ID:  <20020606173742.Q30573-100000@shadowhand.OTEL.net>
In-Reply-To: <3CFF6761.64ACBAE9@tel.fer.hr>

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On Thu, 6 Jun 2002, Marko Zec wrote:

> Iasen Kostov wrote:
>
> > >   You might want to take a look at Marko Zec's VIPA patches that he posted to
> > > -net a few days ago.  You should be able to find it in the mailing list
> > > archives under the subject "Patch for review: source VIPA".
> > >
> >   It will work only if I can arpresolv VIPA and ofcourse resolve it to the
> > right iface lladdr. In other hand we could set same lladdr on all ethernet
> > ifaces.
>
> The VIPA interface is an internal loopback, aka "virtual", as its name implies.
> Therefore it doesn't have an underlying link layer, so you can't do ARP on VIPA.
> The idea is to dynamically advertise this internal address to the outer world, so
> that in case one phy ifc would go down, the VIPA could still remain reachable via
> an alternative path/interface. To accomplish this goal you need to run a routing
> protocol - in my setup the plain old RIP 1 / routed combination worked just fine,
> although this was just an example...
>
> Marko
>
  That means that VIPA does not work in my case.
This is what I found in the kernel:

        /*-
         * Don't add host routes for interface addresses of
         * 0.0.0.0 --> 0.255.255.255 netmask 255.0.0.0.  This makes it
         * possible to assign several such address pairs with consistent
         * results (no host route) and is required by BOOTP.
         *
         * XXX: This is ugly !  There should be a way for the caller to
         *      say that they don't want a host route.
         */

I don't need host route too not just BOOTP :) and yes there should be a
way to miss host route addition.




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