Usage of fd00::/8 on the Interwebz - something with filters and uRPF

[Jeroen Massar]

On 2013-05-30 08:10, Jared Mauch wrote:
> 
> On May 30, 2013, at 2:23 AM, Jeroen Massar <jeroen at massar.ch> wrote:
> 
>> Just showing that quite a few networks are not doing uRPF.
> 
> Problem in many cases is that the vendors don't have working uRPF.
> 
> CSCuh1350

I am unfortunately aware that even in 2013 the big boys do not play
along with a BCP from 2000... ;(

(and as mentioned, for transits, it can be tricky to turn on uRPF or do
other kind of prefix-filters in some cases, though try they should)

> Even if the providers wanted to do it (which many do), in IPv6 land
> it's actually harder due to things like ULA, mapped-v4-in-v6 and other
things.

In the case of ULA (which started this thread) and mapped-v4-v6, does
one really need to use these? One should have more than ample space in
IPv6 to carve out things for special use and null-route those on the
borders in case one does not want them reachable.

And if one does not use ULA etc, one does not source it either.

Greets,
 Jeroen