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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: IPv6 PI block is announced - update your filters 2620:0000::/23
On Fri, 15 Sep 2006, Gert Doering wrote: Hi, On Thu, Sep 14, 2006 at 12:05:16AM +0200, Jeroen Massar wrote:It's update your IPv6 filters time: http://www.arin.net/reference/ip_blocks.html 8<----------------------------------------- IPv6 Assignment Blocks CIDR Block 2620:0000:/23 ----------------------------------------->8 Expect blocks in between /40 and /48 there.Filter recommendation document updated. Could you also add blocks like 2800::/23 from LACNIC issued Nov 2005 by IANA? Does the policy really permit /40.../47 assignments? The only thing I found so far is [1] which really only
defines the <=48 end. It's talking about _at least_ a /44
reserved for future growth and it says "When possible, [subsequent]
assignments will be made from an adjacent address block.".
Considering what we see with v4 PI (direct assignments) today
and had seen with /8 PA and an undefined ("open") other end in
ARIN policy I wouldn't trust any >=40 rule being the maximum
for this block.
I have so far decided to use (also see [2]):
! + ARIN PI (chose whatever one you think is worse)
!ipv6 prefix-list ipv6-ebgp-strict seq 135 deny 2620::/23 le 128
ipv6 prefix-list ipv6-ebgp-strict seq 135 permit 2620::/23 ge 32 le 48
Happy weekend.
/bz
References:
[1] http://www.arin.net/policy/nrpm.html#six582
6.5.8. Direct assignments from ARIN to end-user organizations
6.5.8.2. Initial assignment size
6.5.8.3. Subsequent assignment size
[2] http://sources.zabbadoz.net/ipv6/v6-prefix-filter-20060913-public.cfg
--
Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT
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