Subject: RE: IPv6 routing with non-ppp interfaces
To: 'Richard Braun' <tech-net@NetBSD.org>
From: Konstantin KABASSANOV <Konstantin.Kabassanov@lip6.fr>
List: tech-net
Date: 09/28/2004 17:22:10
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> -----Original Message-----
> From: tech-net-owner@NetBSD.org [mailto:tech-net-owner@NetBSD.org] On
> Behalf Of Richard Braun
> Sent: mardi 28 septembre 2004 17:15
> To: tech-net@NetBSD.org
> Subject: Re: IPv6 routing with non-ppp interfaces
>
> On Tue, Sep 28, 2004 at 12:03:21PM +0200, Konstantin KABASSANOV wrote:
> > > -----Original Message-----
> > > From: tech-net-owner@NetBSD.org [mailto:tech-net-owner@NetBSD.org]
On
> > > Behalf Of Richard Braun
> > > Sent: mardi 28 septembre 2004 11:42
> > > To: tech-net@NetBSD.org
> > > Subject: Re: IPv6 routing with non-ppp interfaces
> > >
> > > On Tue, Sep 28, 2004 at 11:36:59AM +0200, Konstantin KABASSANOV
wrote:
> > > > >
> > > > > /sbin/route -q add -inet6 2001:7a8:432d:1:: -prefixlen 64
> > fe80::%fxp1
> > > > >
> > > > > I tried with -interface too, nothing new. I'm using NetBSD/i386
> > > > > 1.6.2_STABLE
> > > > > btw.
> > > > >
> > > >
> > > > [KK]
> > > > A local-link address like "fe80::" seems a little bit strange...
> > > Supposing
> > > > that it is the next hop router address over the fxp1 interface,
are
> > you
> > > > sure the address is the correct one?
> > > >
> > > > Konstantin
> > >
> > > There is a line about the fe80::%fxp1 destination in the routing
table
> :
> > > fe80::%fxp1/64                     link#2                         UC
> > > 0        0      -  fxp1
> > >
> > > It should be the correct address. However, I've only tested this
kind
> of
> > > addresses on PPP interfaces (including gif tunnels). You said your
> > > configuration was working. How did you configure your routing then ?
> > >
> > > --
> > > Richard Braun
> > [KK]
> >
> > This entry means only that all link-local addresses on the fxp1
> interface
> > can be joined through this interface.
> >
> > If you you have a topology like the following:
> >
> >
---------------------RouterA-------------------------RouterB------------
> --
> > --
> > 2001:7a8:432d:2::/64        fe80::....(1) fe80::...(2)
> > 2001:7a8:432d:1::/64
> >
> > any you want to route packets from 2001:7a8:432d:2::/64 to
> > 2001:7a8:432d:1::/64 between RouterA and RouterB (with link-local
> > addresses obly), you have to use :
> >
> > /sbin/route -q add -inet6 2001:7a8:432d:1:: -prefixlen 64
> > fe80::...(2)%fxp1
> > on RouterA where fe80::...(2) is the link-local address of RouterB.
> >
> > Is it what you want?
> >
> > Konstantin
>
> No, that's what I do with my tunnels and I thought it would also work
for
> an ethernet interface. My topology is :
>
>             ----- fxp0 Router fxp1 -----
>                     ne0(pppoe0)
>                          |
>                          |
>
> fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         address: 00:90:27:71:ed:ae
>         media: Ethernet autoselect (100baseTX full-duplex)
>         status: active
>         inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
>         inet6 fe80::290:27ff:fe71:edae%fxp0 prefixlen 64 scopeid 0x1
>         inet6 2001:7a8:432d::1 prefixlen 64
>
> fxp1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         address: 00:50:8b:5d:c3:09
>         media: Ethernet autoselect (100baseTX full-duplex)
>         status: active
>         inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
>         inet6 fe80::250:8bff:fe5d:c309%fxp1 prefixlen 64 scopeid 0x2
>
> Don't care about ne0 and pppoe0. I would like to have
2001:7a8:432d:1::/64
> allocated to the fxp1 network, without assigning a global address of
that
> block on fxp1. Is it possible, and if yes, how ?
>
That is not really clean... The only thing I can suggest you is to bridge
fxp0 and fxp2... (man bridge)

Konstantin

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