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

Hi,

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]


that said I concur with the approach laid out in an earlier mail by Philip:

"RIPE Atlas acts as a connectivity observatory.  A ULA is the equivalent of
an unconnected node.  It is not broken; it is, by design, limited to local
connectivity, and should always be that way.

If a device has no global IPv6 address, it should be regarded as IPv6
incapable, not IPv6 broken."

best

Enno


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