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Date:   Mon, 5 Feb 2001 11:32:36 +0100
From:   Jacek Konieczny <jajcus@bnet.pl>
To:     netdev@oss.sgi.com
Subject: Re: [ANN] 2nd STABLE release of USAGI Project
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On Mon, Feb 05, 2001 at 07:20:07PM +0900, Yuji Sekiya wrote:
> At Mon, 5 Feb 2001 10:58:22 +0100,
> Jacek Konieczny <jajcus@bnet.pl> wrote:
> 
> > > > > 		+ enabling default route when ipv6 forwarding is enabled,
> > > > Is this really needed? It is a very good feature, that default route is
> > > > not available when ipv6 forwarding (most of IPv6 address space should
> > > > never be forwarded by a default route).
> > > 
> > > For routers in default free zone, it is true. But how about routers in
> > > leaf sites ? All router should have full routes ?
> > No just a route for all unicast addresses: 2000::/3 (AFAIR) 
> > And (maybe) something similar for multicast (if no better multicast
> > routing is available)
> 
> Actually it means default route. I can't see why you announce or add
> statically the route instead of default route.

This is not the same as default route. Prefix 2000::/3 does not contain 
multicast nor link-local and site-local addresses. Only global unicast
addresses. 
When using default route you should (but I am almost sure most people
wouldn't do it) block those addresses by other means.
There are a lot of IPv4 packages with "private network" addresses going
through the Internet just because of badly configured routers -- all
unknown packages go out the default route even if they are
"non-routable".

Greets,
        Jacek