[atlas] [ipv6-wg] What to do with RIPE Atlas probes that have only a ULA as IPv6 address?

Hi,

> On 26 Mar 2015, at 14:42, Enno Rey <erey at ernw.de> wrote:
> 
> On Thu, Mar 26, 2015 at 02:26:14PM +0100, Philip Homburg wrote:
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>> I forgot that RFC-6724 (Default Address Selection for Internet
>> Protocol Version 6) now explicitly lists ULAs, so indeed they would
>> not do any harm in trying to reach a dual-stack target.
> 
> this would assume that
> 
> a) the probes are supposed to follow RFC 6724. are they?
> b) they actually _do_ this (follow RFC 6724) in practice. can this be confirmed? [keeping the wide variety of potential IPv6 node behavior in mind]

If RFC 6434 (IPv6 Node Requirements) is being followed then RFC 6724 (as RFC 3484-bis) MUST be followed. But older implementations may only support RFC 3484.
Further, some implementations appear to do other things (as I believe OS X does, with its preferences for IPv4 vs IPv6).

Tim