[6bone] 2001:478:: as /48

[Jeroen Massar]

-----BEGIN PGP SIGNED MESSAGE-----

Bill Manning wrote:

>  	Something for folks to remember.
> 
> 
> From: Bill Manning <bmanning@ISI.EDU>
> Subject: 2001:478::  as /48
> To: 6bone@ISI.EDU
> Date: Sun, 21 Jul 2002 09:16:40 -0700 (PDT)
> 
> this prefix has/is being carved up into /48 and /64 subnets for
> use at exchange points and other infrastructure support services.

IX Prefixes by the RIR's come out of:
 - 2001:7f8::/32 
 - 2001:504::/32 
 - 2001:7fa::/32 

Which RFC/draft/... made this prefix so special ?

> Do not expect to see it aggregated. 

I would suggest that if you want it to be routable that one
entity announces the /32 that is not going to be filtered.
This way the more specific will still allow it to be reachable.

Checking GRH (http://www.sixxs.net/tools/grh/lg/?format=raw&find=2001:478::/32)

# Space seperated, format:
# [prefix] [flags] [nexthop] [pref] [metric] [origin] [aspath]
# RAW DUMP START
#
# Participant: SixXS - GRH Route View http://www.sixxs.net (8298)
#
# Note: Subnet of 2001:478::/32 
2001:478::/45     2001:610:25:5062::62  IGP 1103 11537 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478::/45     2001:470:1fff:3::3    IGP 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478::/45     2001:1418:1:400::1    IGP 12779 3549 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478::/45     2001:610:ff:c::2      IGP 1888 1103 11537 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478:65::/48  2001:610:25:5062::62  IGP 1103 11537 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478:65::/48  2001:470:1fff:3::3    IGP 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478:65::/48  2001:1418:1:400::1    IGP 12779 3549 6939 109 4555
# Note: Subnet of 2001:478::/32 
2001:478:65::/48  2001:610:ff:c::2      IGP 1888 1103 11537 6939 109 4555
# RAW DUMP END

Hmm they are all sourced from AS4555, one could aggregate
those with ease. Especially as only chello/upc (6939) and
cisco (109) are the only ones doing the transit.
Either there are no other transits or people wisely filter:
http://www.space.net/~gert/RIPE/ipv6-filters.html

Apparently 3ffe::/24 and 3ffe:800::/24 also are originated from 4555:
http://www.sixxs.net/tools/grh/lg/?findtype=origin&find=4555

Btw what is the status of 6bone's ip6.arpa?

Greets,
 Jeroen

-----BEGIN PGP SIGNATURE-----
Version: Unfix PGP for Outlook Alpha 13 Int.
Comment: Jeroen Massar / jeroen@unfix.org / http://unfix.org/~jeroen/

iQA/AwUBP1c5GimqKFIzPnwjEQKLxgCcCW3SqQmuiMcWNggPL5xrI2p5/h8AnieJ
Z9hjHnojYYQgP+cn1duzKiol
=rpWH
-----END PGP SIGNATURE-----