<div dir="ltr">The short version is, your packet hits Vocus Sydney, and gets labelled 'this goes to the US'. Then the router looks at the TTL and goes 'oh, I need to send back a TTL Expired'. Which inherits the label, and so gets sent to the US. Then comes straight back (likely after being re-labelled 'this goes to AU). Showing an increased TTL before the hops show you're actually hitting the US.<div><br></div><div>It's actually a good way to tell that the provider is using MPLS ;)</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 1 September 2015 at 10:21, Ibrahim Kunduraci <span dir="ltr"><<a href="mailto:Ibrahim@amanah.net.au" target="_blank">Ibrahim@amanah.net.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>Thanks guys – MPLS is new to me, excuse my ignorance :)</div>
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<div>Regards</div>
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<span style="font-weight:bold">From: </span>AusNOG on behalf of Brad Gould<br>
<span style="font-weight:bold">Date: </span>Tuesday, 1 September 2015 10:12 am<br>
<span style="font-weight:bold">To: </span>Matt Perkins, "<a href="mailto:ausnog@lists.ausnog.net" target="_blank">ausnog@lists.ausnog.net</a>"<div><div class="h5"><br>
<span style="font-weight:bold">Subject: </span>Re: [AusNOG] Vocus NSW Latency<br>
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<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">MPLS Ping.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">7-->8 would be AU-->USA<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11pt;font-family:Calibri,sans-serif;color:windowtext">From:</span></b><span lang="EN-US" style="font-size:11pt;font-family:Calibri,sans-serif;color:windowtext"> AusNOG [<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank">mailto:ausnog-bounces@lists.ausnog.net</a>]
<b>On Behalf Of </b>Matt Perkins<br>
<b>Sent:</b> Tuesday, 1 September 2015 09:31<br>
<b>To:</b> <a href="mailto:ausnog@lists.ausnog.net" target="_blank">ausnog@lists.ausnog.net</a><br>
<b>Subject:</b> Re: [AusNOG] Vocus NSW Latency<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">We are not seeing what you are from Vocus Sydney. I have always found Vocus support excellent. Why dont you give them a try.<br>
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Matt<br>
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On 1/09/2015 9:55 AM, Ibrahim Kunduraci wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hi guys,<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Seeing high latency between host 114.31.193.37 (<a href="http://ten-1-3-0-782.bdr03.syd03.nsw.VOCUS.net.au" target="_blank">ten-1-3-0-782.bdr03.syd03.nsw.VOCUS.net.au</a>) and host 114.31.192.34 (<a href="http://ten-0-1-0-7.cor01.syd04.nsw.vocus.net.au" target="_blank">ten-0-1-0-7.cor01.syd04.nsw.vocus.net.au</a>); RTT between the 2 hosts increase 10-fold.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p style="margin:0cm;margin-bottom:.0001pt"><span style="font-size:7.5pt;font-family:Tahoma,sans-serif">Tracing route to 4.2.2.2 over a maximum of 30 hops<u></u><u></u></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span style="font-size:7.5pt;font-family:Tahoma,sans-serif"> 1 2 ms 1 ms 1 ms 192.168.52.1<br>
2 <1 ms <1 ms <1 ms 172.16.251.1<br>
3 <1 ms <1 ms <1 ms 172.16.253.2<br>
4 1 ms <1 ms <1 ms 203.83.194.209<br>
5 10 ms 13 ms 10 ms 203.83.194.161<br>
6 10 ms 10 ms 10 ms 203.83.192.42<br>
7 10 ms 10 ms 11 ms 114.31.193.37<br>
8 166 ms 167 ms 205 ms 114.31.192.34<br>
9 167 ms 166 ms 179 ms 114.31.199.85<br>
10 167 ms 167 ms 167 ms 114.31.199.59<br>
11 167 ms 167 ms 167 ms 114.31.199.123<br>
12 177 ms 177 ms 177 ms 46.33.90.49<br>
13 176 ms 174 ms 174 ms 89.149.187.73<br>
14 178 ms 177 ms 178 ms 4.68.62.213<br>
15 167 ms 167 ms 175 ms 4.69.152.206<br>
16 167 ms 167 ms 167 ms 4.2.2.2<u></u><u></u></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span style="font-size:7.5pt;font-family:Tahoma,sans-serif">Trace complete.<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Any known issues? <u></u><u></u></p>
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<p class="MsoNormal">Thanks<u></u><u></u></p>
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<pre>-- <u></u><u></u></pre>
<pre>/* Matt Perkins <u></u><u></u></pre>
<pre> Direct 1300 137 379 Spectrum Networks Ptd. Ltd. <u></u><u></u></pre>
<pre> Office 1300 133 299 <a href="mailto:matt@spectrum.com.au" target="_blank">matt@spectrum.com.au</a> <u></u><u></u></pre>
<pre> Level 6, 350 George Street Sydney 2000<u></u><u></u></pre>
<pre> Spectrum Networks is a member of the Communications Alliance & TIO <u></u><u></u></pre>
<pre>*/<u></u><u></u></pre>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">
<p>Damien Gardner Jnr<br>VK2TDG. Dip EE. GradIEAust<br><a href="mailto:rendrag@rendrag.net" target="_blank">rendrag@rendrag.net</a> - <span><a href="http://www.rendrag.net/" target="_blank">http://www.rendrag.net/</a><u><br></u></span>--<br>We rode on the winds of the rising storm,<br> We ran to the sounds of thunder.<br>We danced among the lightning bolts,<br> and tore the world asunder</p></div></div>
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