[151018] in North American Network Operators' Group
Re: filtering /48 is going to be necessary
daemon@ATHENA.MIT.EDU (Owen DeLong)
Fri Mar 9 23:42:33 2012
From: Owen DeLong <owen@delong.com>
In-Reply-To: <CAK__KzuNMxriXfkHa6tBpZF93LROf2xLvujDUDUU-hKJ-0LMYw@mail.gmail.com>
Date: Fri, 9 Mar 2012 20:41:00 -0800
To: George Herbert <george.herbert@gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
This varies from RIR to RIR.
In the ARIN region, you can get assignments or allocations for Multiple =
Discreet Networks, but, ARIN will often register them as an aggregate in =
the registration database, so...
In the RIPE region (which is where I believe Sander is), only aggregates =
are available to the best of my knowledge.
Owen
On Mar 9, 2012, at 3:40 PM, George Herbert wrote:
> If the LIRs cannot get separate allocations from the RIR (and separate
> ASNs) for this usage, something is wrong.
>=20
> We want to make things as simple and efficient as possible, but no
> simpler or more efficient, because the curves go back up again at that
> point, and we all suffer.
>=20
>=20
> -george
>=20
> On Fri, Mar 9, 2012 at 3:32 PM, Sander Steffann <sander@steffann.nl> =
wrote:
>> Hi,
>>=20
>>> What should happen is this "quasi-legitimate" method of
>>> multi-homing should just be declared illegitimate for IPv6, to
>>> facilitate stricter filtering. Instead, what should happen is the
>>> multi-homing should be required to fit into one of 3 scenarios, so
>>> any announcement with an IPv6 prefix length other than the
>>> RIR-allocated/assigned PA or PI block size can be treated as TE and
>>> summarily discarded or prioritizes when table resources are scarce.
>>=20
>> Splitting the allocation can be done for many reasons. There are =
known cases where one LIR operates multiple separate networks, each with =
a separate routing policy. They cannot get multiple allocations from the =
RIR and they cannot announce the whole allocation as a whole because of =
the separate routing policies (who are sometimes required legally, for =
example when an NREN has both a commercial and an educational network). =
Deaggregating to /48's is not a good idea, but giving an LIR a few bits =
(something like 3 or 4) to deaggregate makes sense.
>>=20
>> - Sander
>>=20
>>=20
>=20
>=20
>=20
> --=20
> -george william herbert
> george.herbert@gmail.com
