[atlas] IPv6 auto-tagging failure?

Hello,

I'm wondering a bit about the IPv6 auto-tagging.  I recently reveived a
v3 probe and connected it to a dual-stack enabled network. The probe
was initially tagged as

 2015-04-16 20:23 UTC 	Probe auto-tagged 	Your probe #22894 was automatically tagged as "system: IPv6 Capable"

but then (on the next batch run?, after a couple of quick firmware
upgrades (3.3.8 => 4650 => 4680):

 2015-04-17 08:23 UTC 	Probe auto-untagged 	Your probe #22894 was automatically untagged as "system: IPv6 Capable"

and there it has been since.  This wouldn't worry me too much if it
otherwise worked, but I noticed that the probe isn't listed with an "ASN
v6" either.  So I assume the missing tag prevents it from being used for
v6 probing?

AFAICS, the probe does take the announced prefix, and is actually *using*
the provided IPv6 connectivity.  The "Connection History" shows that it
consistently uses its SLAAC address to connect to the controller.

So why isn't it tagged as IPv6 capable/works etc?

In desperation I tried different netwrok settings, static address,
adding v6 DNS, and fiddling with the managed/other flags along with
matching DHCPv6 config.  Made no difference of course.  If I understood
correctly, the probe firmware won't currently do any DHCPv6, and v6 DNS
is optional as long as there is a working v4 resolver available.


Bjørn