[atlas] Selecting only anchors for UDM

On 11.06.14 15:56 , Stephane Bortzmeyer wrote:
> On Wed, Jun 11, 2014 at 03:44:48PM +0200,
>  Daniel Karrenberg <daniel.karrenberg at ripe.net> wrote 
>  a message of 11 lines which said:
> 
>> Hence IPV6WORKS. ;-)
> 
> Set how? Pinging a few Anchors and checking that at least N % answers?

That is a very open question and we'd like input about it.

My *personal* straw-man for IPV6WORKS would be "At least 3 IPv6 targets
pinged successfully in the past 24 hours". IPv6 targets should be
high-availability built-in measurement targets such as anchors and root
name servers. The number and time interval can be discussed.

The problem with this is that one wants to select probes that have a
structural local problem while keeping probes that have intermittent and
less local problems. In other words: if we exclude too many non-working
probes we cannot easily measure real operational problems.

Hence I proposed HASIPV6 which could mean that a non-link-local IPv6
address is configured or something similar.

The nice thing about tags is that we can have as many we consider useful ...

Daniel