IPv6 blocks for micro-allocation

kura at iij.ad.jp kura at iij.ad.jp
Tue Jun 3 11:22:56 CEST 2008

Hello Jeroen,

I have already checked the page, but the filters in the page are a
little loose for our purpose.

For example, from the strict filter for IOS, etc. in the page,
> ipv6 prefix-list ipv6-ebgp-strict permit 2001:0c00::/23 ge 48 le 48

The above line permits, e.g. 2001:c00:1::/48, 2001:c00:2::/48, ...
However I think these /48 prefixes should be rejected because
2001:c00::/32 is a PA block. In order to accept prefixes of APNIC PI
only, I think I have to know strictly the block (and prefix range)
for APNIC PI assignemnts.

And I think the information is more important to build such filters
for JUNOS. The strict filter for JUNOS in the page permits, e.g.
2001:df0:2::/48, 2001:df0:3::/48, ... (I believe these prefixes are
APNIC PI), but the filter rejects, e.g. 2001:c00::/32, 2001:c08::/32, ...
because these /32 prefixes match the line below,
> route-filter 2001:0c00::/23 prefix-length-range /48-/48;

I think the line has to be replaced e.g., with
"route-filter 2001:df0::/29 prefix-length-range /44-/48". (The range
is not "/48-/48" because "2001:df0::/47" has been assigned to a site.)

Best regards,
Tomohiko Kurahashi <kura at iij.ad.jp>
Internet Initiative Japan Inc.

From: jeroen at unfix.org
Date: Tue Jun 03 2008 18:13:52 JST
> kura at iij.ad.jp wrote:
> > Hello all,
> > 
> > I'd like to create a complete list of IPv6 blocks for micro-allocation,
> > in order to maintain our BGP filter properly.
> Just keep checking: http://www.space.net/~gert/RIPE/ipv6-filters.html
> Contains all the details and will be kept updated regularly too. When 
> updates happen Gert generally notifies this list of it.
> Greets,
>   Jeroen

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