<div dir="ltr">Wouldn't it be easier to simply convince said transit ASes to host a probe? for most part, you'd now be dealing with networking professionals rather than end-users, so they have an incentive to host a probe (for their own routing needs) and technical capacity to do so, whereas for non-transit ASes you are sometimes dependant on a user being a good samaritan or otherwise having a need to access measurements.<div><br></div><div>Regards,</div><div><br></div><div>Gil Bahat,</div><div>DevOps Engineer,</div><div>Magisto Ltd.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 16, 2015 at 4:15 PM, Klaus Darilion <span dir="ltr"><<a href="mailto:klaus.mailinglists@pernau.at" target="_blank">klaus.mailinglists@pernau.at</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 11.11.2015 16:32, Stephane Bortzmeyer wrote:<br>
> Is there an easy way to select probes, not on the origin AS, but on an<br>
> AS upstream? Example: probe 23865, IP prefix announced by AS 56339<br>
> which currently has only one provider, AS 16080. Currently, Atlas<br>
> tells me there are no probes in AS 16080...<br>
<br>
I have the same problem quite often. For several important Backbone<br>
providers there aren't any probes. But there would be a lot of probes<br>
which are "behind" these ASes. Choosing this probes is of course not a<br>
guarantee that the targeted transit ISP is really used for routing<br>
(multihoming, peering) but I think in many cases this would work.<br>
<br>
You RIPE guys build so cool systems, I think it would be easy for you to<br>
integrate RIS data into Atlas. So, if somebody searches for probes in an<br>
AS, you could also suggest probes from neighboring ASes (especially the<br>
ones which have only one neighbor AS). So for above case:<br>
<br>
<a href="https://stat.ripe.net/data/asn-neighbours/data.json?resource=56339" rel="noreferrer" target="_blank">https://stat.ripe.net/data/asn-neighbours/data.json?resource=56339</a><br>
<br>
If you do this lookup once a day and add the info to the probe<br>
information (maybe only using "left" neighbors), it could be used for<br>
probe selection.<br>
<br>
regards<br>
<span class="HOEnZb"><font color="#888888">Klaus<br>
<br>
</font></span></blockquote></div><br></div>