Re: [v6ops] Last Call: <draft-ietf-v6ops-6to4-to-historic-04.txt> (Request to move Connection of IPv6 Domains via IPv4 Clouds (6to4) to Historic status) to Informational RFC

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On Jun 9, 2011, at 10:42 AM, Lorenzo Colitti wrote:
> 
>  We have data that clearly shows that Mac OS 10.6.4, which uses 6to4 by default...

I don't want anybody to be misled by this statement.  I think what Lorenzo meant to say is that Mac OS X 10.6.4 and earlier doesn't implement the policy table in I-D.ietf-6man-rfc3484-revise, which prefers IPv4 source addresses over 2002::/16 IPv6 source addresses.

Mac OS X has *never* used 6to4 by default.  The scenario Lorenzo is talking about is where a router is advertising a 6to4 prefix onto a native IPv6 link.  On those links, Mac OS X 10.6.4 and earlier will treat 6to4 prefixes equivalently to any other IPv6 prefix when making address selection decisions.


--
james woodyatt <jhw@xxxxxxxxx>
member of technical staff, core os networking



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