[6bone] non-global address space for IXs (was: 2001:478:: as /48)

[Gert Doering]

Hi,

On Sun, Sep 07, 2003 at 06:14:08PM -0400, Haesu wrote:
> I second that;although using loose-check uRPF on  upstreams would work fine in
> general. My consensus is that 'why should I recv a packet if it does not
> exist in routing table?' 

Because it will break PMTUD in those cases (and, more frequent, in the
case of stupid ISPs that use RFC1918 transit networks and send ICMPs from
those source addresses).

In a world where everybody knows what he's doing, upstream "loose uRPF"
should be fine (but in that world you wouldn't need it either).  *sigh*.

Gert Doering
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