Mailing List Archive: NANOG: users

IPv6 Prefix Policy

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frank at troy-networks

Jul 3, 2008, 7:49 AM

Post #1 of 4 (336 views)
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IPv6 Prefix Policy

Hi,

Can someone point me to the latest information on the minimum IPv6 prefix
providers will accept for Provider Independent IPv6 prefixes?

Thanks

Frank

------------------------------------

Frank P. Troy

703-396-8700

frank[at]troy-networks.com

-------------------------------------

jeroen at unfix

Jul 3, 2008, 7:55 AM

Post #2 of 4 (321 views)
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Re: IPv6 Prefix Policy [In reply to]

Frank P. Troy wrote:
> Hi,
>
>
>
> Can someone point me to the latest information on the minimum IPv6 prefix
> providers will accept for Provider Independent IPv6 prefixes?

Ask the providers directly, it is their network thus they will have
their own policies.

In general though, ASNs are following:
http://www.space.net/~gert/RIPE/ipv6-filters.html

I don't know how common the strict/non-strict case is though, but
looking at GRH (http://www.sixxs.net/tools/grh/) it seems that most
ASN's are properly filtering, thus using the strict model.

Of course don't forget to signup for GRH if you are going to/are
participating in the IPv6 BGP and also of course sign up to ipv6-ops to
keep informed about technical issues (SnR is quite high fortunately):
http://lists.cluenet.de/pipermail/ipv6-ops

Greets,
Jeroen

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bicknell at ufp

Jul 3, 2008, 8:12 AM

Post #3 of 4 (319 views)
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Re: IPv6 Prefix Policy [In reply to]

In a message written on Thu, Jul 03, 2008 at 04:55:37PM +0200, Jeroen Massar wrote:
> In general though, ASNs are following:
> http://www.space.net/~gert/RIPE/ipv6-filters.html
>
> I don't know how common the strict/non-strict case is though, but
> looking at GRH (http://www.sixxs.net/tools/grh/) it seems that most
> ASN's are properly filtering, thus using the strict model.

The strict filter is still broken in at least one way.

ipv6 prefix-list ipv6-ebgp-strict permit 2001:500::/30 ge 48 le 48

http://www.arin.net/reference/micro_allocations.html

Note that there are /45's, /46's, /47's and /48's right now. The
filter allows only /48's. Of note, this will break access to the
F-Root name server, we announce it from both a /47 and a /48 (local
peers only) in IPv6.

I believe there are other issues with the strict filter, but don't have
the time to track them down right now.

--
Leo Bicknell - bicknell[at]ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/

jeroen at unfix

Jul 3, 2008, 9:52 AM

Post #4 of 4 (319 views)
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Re: IPv6 Prefix Policy [In reply to]

Leo Bicknell wrote:
> In a message written on Thu, Jul 03, 2008 at 04:55:37PM +0200, Jeroen Massar wrote:
>> In general though, ASNs are following:
>> http://www.space.net/~gert/RIPE/ipv6-filters.html
>>
>> I don't know how common the strict/non-strict case is though, but
>> looking at GRH (http://www.sixxs.net/tools/grh/) it seems that most
>> ASN's are properly filtering, thus using the strict model.
>
> The strict filter is still broken in at least one way.

Then mail Gert Doering about it, if he doesn't know he can't update it ;)

> ipv6 prefix-list ipv6-ebgp-strict permit 2001:500::/30 ge 48 le 48
>
> http://www.arin.net/reference/micro_allocations.html
>
> Note that there are /45's, /46's, /47's and /48's right now. The
> filter allows only /48's. Of note, this will break access to the
> F-Root name server, we announce it from both a /47 and a /48 (local
> peers only) in IPv6.
>
> I believe there are other issues with the strict filter, but don't have
> the time to track them down right now.

If you have them, please pass them on to Gert and possibly also spam
ipv6-ops.

Greets,
Jeroen

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