[lir-wg] AS Number Policy

On Wed, 10 Jul 2002 11:22:29 -0400, "Lu, Ping" <PLu at cw.net> wrote:

>I don't think to blackholing traffic is a good idea, especially
>when bandwidth means money in today's internet.

I agree.  Neither do I think the community should be paying to provide the
bandwidth for such a service.

Encouraging people to filter out these netblocks/ASNs does make it very hard to
re-allocate them in the short term.  However, most people who maintain good
bogon filters also update them frequently, so hopefully would remove any such
filters in plenty of time for ASNs to be re-allocated after 12/24/36 months.

>RIRs should publish a list to include all the offending prefixes and
>the major ISPs will be more than happy to apply the prefix filter to
>block transit to those prefixes. There is already an IANA bogon filter
>floating around.

This was my suggestion in a nutshell.  I believe the most commonly observed
bogon list is maintained by Rob Thomas
(http://www.cymru.com/Documents/bogon-list.html).  draft-iana-special-ipv4-03 is
IANA's most comprehensive list of special use netblocks
(http://www.ietf.org/internet-drafts/draft-iana-special-ipv4-03.txt).

>RIPE NCC could add a filter-set object, let's say FLTR-RIPE-RESERVED-IPV4
>and
>ARIN should have a FLTR-ARIN-RESERVED-IPV4 object, 
>APNIC also should have a FLTR-APNIC-RESERVED-IPV4 object.
>Then all major ISPs could apply these filter to block transit traffic for
>these
>prefixes.

This sounds excellent but doesn't cover prefixes IANA have not yet allocated to
an RIR.  This is why I would encourage frequent sharing of this data with the
networking community and especially the maintainers of public bogon lists on
which many people filter.

>Blocking is a better idea than blackholing....

C.