<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="en-PL" link="blue" vlink="purple" style="word-wrap:break-word"> <div class="WordSection1"> <p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Malte Appel already partially responded to you questions. I will try to provide more details.<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Each probe has build-in measurements for 1<sup>st</sup> and 2<sup>nd</sup> hop. For your probe it is:<o:p></o:p></span></p> <ul style="margin-top:0cm" type="disc"> <li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span lang="EN-US" style="mso-fareast-language:EN-US">nice view <a href="https://atlas.ripe.net/probes/1001821/#tab-builtins">https://atlas.ripe.net/probes/1001821/#tab-builtins</a><o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span lang="EN-US" style="mso-fareast-language:EN-US">1<sup>st</sup> hop </span><span style="mso-fareast-language:EN-US"><a href="https://atlas.ripe.net/api/v2/measurements/1/results/?probe_ids=1001821&start=1619136000&stop=1619222399&format=json">https://atlas.ripe.net/api/v2/measurements/1/results/?probe_ids=1001821&start=1619136000&stop=1619222399&format=json</a></span><span style="mso-fareast-language:EN-US"> </span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2"><span lang="EN-US" style="mso-fareast-language:EN-US">2<sup>nd</sup> hop </span><span style="mso-fareast-language:EN-US"><a href="https://atlas.ripe.net/api/v2/measurements/2/results/?probe_ids=1001821&start=1619136000&stop=1619222399&format=json">https://atlas.ripe.net/api/v2/measurements/2/results/?probe_ids=1001821&start=1619136000&stop=1619222399&format=json</a></span><span style="mso-fareast-language:EN-US"> </span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></li></ul> <p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">If you take your probe as an example you will notice that your first hop is your local router (Starlink dish?) and it has RTT <1ms. It's your 2<sup>nd</sup> hop which can indicate what RTT is generated by Starlink satellite connection (RTT Median Average ~30ms). I'm curious where exactly is located this 2<sup>nd</sup> hop :)<o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p> <div> <p class="MsoNormal"><span lang="EN-US">Regards,<o:p></o:p></span></p> </div> <p class="MsoNormal"><span lang="EN-US">Grzegorz</span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p> <p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p> <div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"> <p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Ray Bellis <ray@isc.org><br> <b>Date: </b>Friday 2021-04-23 at 10:44<br> <b>To: </b>"ripe-atlas@ripe.net" <ripe-atlas@ripe.net><br> <b>Subject: </b>Re: [atlas] Satellite based "last mile" and Atlas probes<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">On 22/04/2021 20:52, Ponikierski, Grzegorz via ripe-atlas wrote:<o:p></o:p></p> </div> <blockquote style="border:none;border-left:solid #B5C4DF 4.5pt;padding:0cm 0cm 0cm 4.0pt;margin-left:3.75pt;margin-right:0cm" id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE"> <div> <p class="MsoNormal">Checking<o:p></o:p></p> </div> <div> <p class="MsoNormal">first hop can be tricky because this first hop can be local router with<o:p></o:p></p> </div> <div> <p class="MsoNormal">RTT <1ms and second hop can indicate that we are on satellite<o:p></o:p></p> </div> <div> <p class="MsoNormal">connectivity. For that API for sure API must be used. Here is the full<o:p></o:p></p> </div> <div> <p class="MsoNormal">list of build in measurements:<o:p></o:p></p> </div> <div> <p class="MsoNormal"><a href="https://urldefense.com/v3/__https:/beta-docs.atlas.ripe.net/built-in/reference.html*traceroute-5-000-6-999__;Iw!!GjvTz_vk!CGnJSJwFwnAeSTFJcu_wN5qF5pxMnHYnUY2rcHz_afOJoH0Tp49DDDQm0TvPlSQ$">https://urldefense.com/v3/__https://beta-docs.atlas.ripe.net/built-in/reference.html*traceroute-5-000-6-999__;Iw!!GjvTz_vk!CGnJSJwFwnAeSTFJcu_wN5qF5pxMnHYnUY2rcHz_afOJoH0Tp49DDDQm0TvPlSQ$</a> <o:p></o:p></p> </div> <div> <p class="MsoNormal"><<a href="https://urldefense.com/v3/__https:/beta-docs.atlas.ripe.net/built-in/reference.html*traceroute-5-000-6-999__;Iw!!GjvTz_vk!CGnJSJwFwnAeSTFJcu_wN5qF5pxMnHYnUY2rcHz_afOJoH0Tp49DDDQm0TvPlSQ$">https://urldefense.com/v3/__https://beta-docs.atlas.ripe.net/built-in/reference.html*traceroute-5-000-6-999__;Iw!!GjvTz_vk!CGnJSJwFwnAeSTFJcu_wN5qF5pxMnHYnUY2rcHz_afOJoH0Tp49DDDQm0TvPlSQ$</a> ><o:p></o:p></p> </div> <div> <p class="MsoNormal">+ build in ping tests for 1^st and 2^nd hop are respectively measurement<o:p></o:p></p> </div> <div> <p class="MsoNormal">#1 and #2.<o:p></o:p></p> </div> </blockquote> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Can you please elaborate on this?<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">I have a separate need (relating to an ICANN RSSAC WG) to be able to<o:p></o:p></p> </div> <div> <p class="MsoNormal">detect high latency last mile hops but I could not identify the specific<o:p></o:p></p> </div> <div> <p class="MsoNormal">"built-in ping tests for 1st and 2nd hop" that you described.<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Were you perhaps suggesting that it was actually just the first couple<o:p></o:p></p> </div> <div> <p class="MsoNormal">of rows of data from the built-in *traceroute* tests that hold this data?<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">thanks,<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal">Ray<o:p></o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> <div> <p class="MsoNormal"><o:p> </o:p></p> </div> </div> </body> </html>