[ppml] [address-policy-wg] Those pesky ULAs again

Iljitsch van Beijnum iljitsch at muada.com
Fri Jun 1 12:44:18 EDT 2007

On 30-mei-2007, at 18:22, Paul_Vixie at isc.org wrote:

> first, ARIN does not currently consider routability when allocating
> address space.



6.3.4. Aggregation
Wherever possible, address space should be distributed in a  
hierarchical manner, according to the topology of network  
infrastructure. This is necessary to permit the aggregation of  
routing information by ISPs, and to limit the expansion of Internet  
routing tables.

This goal is particularly important in IPv6 addressing, where the  
size of the total address pool creates significant implications for  
both internal and external routing.

The whole "routing is not guaranteed" thing is obviously in there  
because of the lawyers since ARIN can't force ISPs to route any given  
block of address space, not because routability isn't a goal.

> non-routable space comes from ietf/iana, not the RIRs.
> so, for ARIN to start allocating nonroutable space is a big change.

Keeping the RIRs out of the ULA business would nicely avoid any  
problems resulting from that. Just let the domain sell the ip6.arpa  
domains in question.

> (heck, maybe the old site-local prefix is still available.)


    Existing implementations and deployments MAY continue to use this

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