<div dir="ltr">Hi Skeeve,<div><br></div><div>As Brad said, that's just ECMP working its multipath magic.</div><div><br></div><div>It looks like your network has two connections into Telstra's network (one each off chw-edge901 and ken-edge901), which are of unequal path lengths as seen from the perspective of your local machine (with the last hop on your network on the way to ken-edge901 not shown in the above output).</div><div><br></div><div>ECMP combined with a low number of UDP probes (and thus insufficient randomnness to pluck all possible paths out of the woodwork) can lead to extremely confusing ECMP traceroutes.</div><div><br></div><div><br></div><div>Try running an ICMP trace instead to get a solid idea of what (one) of your paths is like:</div><div><br></div><div> $ sudo traceroute -I 1.1.1.1</div><div><br></div><div><br></div><div>Regards,</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Benoit Page-Guitard<br>Network Engineer<br>Hostopia Australia<br><br>Phone: 1300 MY HOST (694 678)<br>Email: <a href="mailto:benoit.page@hostopia.com.au" target="_blank">benoit.page@hostopia.com.au</a><br>Website: <a href="https://www.hostopia.com.au/" target="_blank">https://www.hostopia.com.au/</a></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On 10 October 2018 at 19:54, Skeeve Stevens <span dir="ltr"><<a href="mailto:skeeve+ausnog@eintellegonetworks.com" target="_blank">skeeve+ausnog@eintellegonetworks.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr">Hey all,<div><br></div><div>Does anyone understand this... it hurts my brain.</div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace" size="1">Skeeve-Faqtory-27:~ skeeve.stevens$ traceroute 1.1.1.1<br></font></div><div><div><font face="monospace, monospace" size="1">traceroute to 1.1.1.1 (1.1.1.1), 64 hops max, 52 byte packets</font></div><div><font face="monospace, monospace" size="1"> 1 x.x.x.10 (<span style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">x.x.x.10</span>) 0.949 ms 0.615 ms 0.585 ms</font></div><div><font face="monospace, monospace" size="1"> 2 x.x.x.1 (<span style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">x.x.x.1</span>) 1.169 ms 1.106 ms 1.022 ms</font></div><div><font face="monospace, monospace" size="1"><br></font></div><div><font face="monospace, monospace" size="1"> 3 172.18.208.9 (172.18.208.9) 19.487 ms 19.802 ms 19.576 ms</font></div><div><font face="monospace, monospace" size="1"> 4 172.18.66.197 (172.18.66.197) 20.170 ms</font></div><div><font face="monospace, monospace" size="1"> 172.18.66.193 (172.18.66.193) 20.538 ms 19.848 ms</font></div><div><font face="monospace, monospace" size="1"> 5 <a href="http://bundle-ether4.chw-edge901.sydney.telstra.net" target="_blank">bundle-ether4.chw-edge901.<wbr>sydney.telstra.net</a> (203.50.12.108) 20.093 ms 20.163 ms 21.795 ms</font></div><div><font face="monospace, monospace" size="1"> 6 <a href="http://bundle-ether2.ken-edge901.sydney.telstra.net" target="_blank">bundle-ether2.ken-edge901.<wbr>sydney.telstra.net</a> (203.50.11.102) 20.296 ms 19.528 ms</font></div><div><font face="monospace, monospace" size="1"> <a href="http://bundle-ether13.chw-core10.sydney.telstra.net" target="_blank">bundle-ether13.chw-core10.<wbr>sydney.telstra.net</a> (203.50.11.98) 21.252 ms</font></div><div><font face="monospace, monospace" size="1"> 7 <a href="http://bundle-ether1.chw-edge902.sydney.telstra.net" target="_blank">bundle-ether1.chw-edge902.<wbr>sydney.telstra.net</a> (203.50.11.101) 19.891 ms</font></div><div><font face="monospace, monospace" size="1"> <a href="http://bundle-ether13.ken-core10.sydney.telstra.net" target="_blank">bundle-ether13.ken-core10.<wbr>sydney.telstra.net</a> (203.50.11.94) 22.118 ms 21.234 ms</font></div><div><font face="monospace, monospace" size="1"> 8 <a href="http://bundle-ether2.ken-edge902.sydney.telstra.net" target="_blank">bundle-ether2.ken-edge902.<wbr>sydney.telstra.net</a> (203.50.11.104) 19.428 ms 20.432 ms</font></div><div><font face="monospace, monospace" size="1"> <a href="http://bundle-ether1.ken-edge902.sydney.telstra.net" target="_blank">bundle-ether1.ken-edge902.<wbr>sydney.telstra.net</a> (203.50.11.97) 20.719 ms</font></div><div><font face="monospace, monospace" size="1"> 9 <a href="http://clo2241682.lnk.telstra.net" target="_blank">clo2241682.lnk.telstra.net</a> (144.130.174.50) 20.385 ms 20.533 ms 20.532 ms</font></div><div><font face="monospace, monospace" size="1">10 one.one.one.one (1.1.1.1) 20.224 ms 19.687 ms 19.703 ms</font></div><div><font face="monospace, monospace" size="1"><br></font></div><div>It looks like it going to Chatswood, Kent St and back and forwards. It is odd.</div><div><div dir="ltr" class="m_2613138147853643963m_8148622198046125087gmail_signature"><div dir="ltr"><div style="font-size:13px"><br>...Skeeve</div><div style="font-size:13px"><br></div><div style="font-size:13px"><div><b style="font-family:Calibri">Skeeve Stevens - Founder & Chief Architect - </b><span style="font-family:Calibri">eintellego Networks Pty Ltd</span></div><div><div><span style="font-family:Calibri"><a href="mailto:skeeve@eintellegonetworks.com" target="_blank">skeeve@eintellegonetworks.com</a> <wbr>; <a href="http://www.eintellegonetworks.com/" target="_blank">www.eintellegonetworks.com</a></span><p style="color:rgb(0,0,0);font-family:Calibri;margin:0px">Phone: 1300 239 038; Cell +61 (0)414 753 383 ; <a>skype://skeeve</a></p><p style="color:rgb(0,0,0);font-family:Calibri;margin:0px"><a href="http://facebook.com/eintellegonetworks" target="_blank">facebook.com/<wbr>eintellegonetworks</a> ; <a href="http://twitter.com/networkceoau" target="_blank"></a><a href="http://linkedin.com/in/skeeve" target="_blank">linkedin.<wbr>com/in/skeeve</a> </p></div><div style="font-family:Calibri,sans-serif;font-size:14px;color:rgb(127,0,127)"><span style="color:rgb(0,32,96);font-size:13px">Cumulus Linux / Open Networking - Cloud</span><span style="color:rgb(0,32,96);font-size:13px"> </span><span style="color:rgb(0,32,96);font-size:13px">- Consulting</span><span style="color:rgb(0,32,96);font-size:13px"> </span><span style="color:rgb(0,32,96);font-size:13px">- </span><span style="font-size:13px;color:rgb(0,32,96)">Juniper - Cisco </span><span style="font-size:13px;color:rgb(0,32,96)">- </span><span style="color:rgb(0,32,96);font-size:13px">IPv4 Brokering</span></div></div></div></div></div></div></div></div></div>
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