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Date:      Mon, 03 Sep 2001 00:47:11 +0900
From:      JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp>
To:        Wouter Van Hemel <wvhemel@vub.ac.be>
Cc:        <freebsd-questions@FreeBSD.ORG>
Subject:   Re: ipv6 route configuration
Message-ID:  <y7vu1ylh9xc.wl@condor.jinmei.org>
In-Reply-To: <Pine.LNX.4.33.0108291636090.197-100000@cocaine.cryolabs.net>
References:  <Pine.LNX.4.33.0108291636090.197-100000@cocaine.cryolabs.net>

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First of all, please specify the OS and its version of your router and
hosts.  Without the information, we cannot diagnose the problem
correctly.

>>>>> On Wed, 29 Aug 2001 17:06:08 +0200 (CEST), 
>>>>> Wouter Van Hemel <wvhemel@vub.ac.be> said:

> 1) why does the /48 class get bound to lo0?

I guess it should actually be:

route add -inet6 3ffe:0b80:01c8:: -prefixlen 48 -interface lo0 -reject
                                                               ^^^^^^^

this is a typical configuration at a site-border router, in order to
prevent packets towards non-existing internal address from being sent
outside of the site.

> 2) how do I send the full /48 class to the internal net, using ::1 for the
> router itself - like my ipv4 internal net?

You don't have to advertise the full /48 route.  In this
configuration, you should only advertise 3ffe:b80:1c8::/64 on the
internal segment.  rtadvd will do this automatically.

> 3) does rtadvd have to run on all machines, or just the router?

No, rtadvd must run on routers only.

One more related comment: you should not configure rtadvd.conf by
hand.  rtadvd will automatically collect all information that it
needs, and will advertise it without any configuration.  You should
usually just invoke rtadvd like:
# rtadvd ed1

from KAME's rtadvd(8):

     If there is no configuration file entry for an interface, or if the con-
     figuration file does not exist altogether, rtadvd sets all the parameters
     to their default values.  In particular, rtadvd reads all the interface
     routes from the routing table and advertises them as on-link prefixes.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp

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