<div dir="ltr"><div dir="ltr"><div dir="ltr"><div>Thanks again for your insightful responses!</div><div><br></div><div>The case we discuss above is Chinese ISPs renting routers located outside China and the IPs belong to other ISPs.</div><div><br></div><div>How about the case that the IP belongs to a Chinese ISP and is located in US(from RTT result), can we say it is very likely or definitely owned/operated by the Chinese ISP? Why would some ISP try to rent routers of Chinese ISP in US? </div><div><br></div><div>For example, a traceroute from Ohio to an IP in China. Hop 17 and hop 18 should be located in US based on the RTT, and yet they belong to a Chinese AS(China Telecom). Does this mean that Chinese Telecom is managing these two hops?<br></div><div><div dir="ltr" class="m_2202828694271075629gmail_signature"><br></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> HOST: Loss% Snt Last Avg Best Wrst StDev</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 6. AS??? 100.65.11.97 0.0% 100 2.0 1.0 0.4 12.6 1.3</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 7. AS??? 52.93.15.238 0.0% 100 2.4 2.0 1.5 11.4 1.1</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 8. AS??? 52.93.14.134 0.0% 100 21.9 26.3 4.2 54.4 11.3</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 9. AS??? 52.93.14.119 0.0% 100 2.6 2.1 1.6 10.8 1.2</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 10. AS??? 100.91.27.86 0.0% 100 25.8 26.2 25.6 34.9 1.2</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 11. AS??? 54.239.42.197 0.0% 100 25.5 25.9 25.4 35.8 1.5</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 12. AS??? 100.91.4.218 0.0% 100 25.9 26.2 25.1 38.3 1.6</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 13. AS??? 100.91.4.217 0.0% 100 25.4 26.0 25.3 41.4 2.0</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 14. AS??? 100.91.5.85 0.0% 100 25.3 25.8 25.2 29.1 0.9</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 15. AS??? 54.239.103.86 0.0% 100 25.6 30.0 25.2 49.1 3.8</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 16. AS??? 54.239.103.77 0.0% 100 25.3 25.6 25.2 28.1 0.5</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 17. AS4134 218.30.53.1 0.0% 100 28.0 29.1 25.2 33.1 2.3</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 18. AS4134 202.97.50.21 0.0% 100 32.4 29.1 25.2 33.5 2.4</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 19. AS??? ??? 100.0 100 0.0 0.0 0.0 0.0 0.0</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 20. AS??? ??? 100.0 100 0.0 0.0 0.0 0.0 0.0</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 21. AS4134 202.97.94.121 0.0% 100 186.8 185.6 181.8 189.8 2.3</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 22. AS4816 119.147.222.6 0.0% 100 182.6 183.5 182.4 195.8 1.8</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 23. AS4816 183.2.182.130 0.0% 100 181.7 183.3 181.5 207.0 3.9</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 24. AS??? ??? 100.0 100 0.0 0.0 0.0 0.0 0.0</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 25. AS45102 116.251.113.158 0.0% 100 176.7 177.9 176.5 186.7 2.1</font></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><font face="courier new, monospace"> 26. AS45102 116.251.115.141 0.0% 100 213.2 213.4 213.1 218.5 0.6</font></div></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><br></div><div dir="ltr" class="m_2202828694271075629gmail_signature"><br>Best,<br>Pengxiong Zhu<br>Department of Computer Science and Engineering<br>University of California, Riverside</div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 16, 2019 at 7:37 PM Erik Sundberg <<a href="mailto:ESundberg@nitelusa.com" target="_blank">ESundberg@nitelusa.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div id="m_2202828694271075629gmail-m_3545298425202876015divtagdefaultwrapper" style="font-size:12pt;color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif" dir="ltr">
<p style="margin-top:0px;margin-bottom:0px">May sure when you are dealing with transnational links to watch the latency so you can tell when the link goes international. Just because you are going from a US Network provider to China Telecom doesn't mean that your
not connecting to them in the united states.</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">For example a traceroute from Denver to 27.29.128.1 which is an IP in China Telecom's network.</p>
<p style="margin-top:0px;margin-bottom:0px">It's about 26ms between Denver and Los Angeles. Hop 5 to Hop 6</p>
<p style="margin-top:0px;margin-bottom:0px">China Telecom connects to GTT in Los Angeles Hop7/8</p>
<p style="margin-top:0px;margin-bottom:0px">On Hop 8 is in the United State and Hop 9 is across the pacific. Because the latency goes from 31 ms to 183 ms. </p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">Just something to keep in mind.</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"></p>
<div><span style="font-family:Consolas,Courier,monospace"> Packets Pings</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> Host Loss% Snt Last Avg Best Wrst StDev</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 1. _gateway 0.0% 14 1.0 1.2 1.0 2.8 0.5</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 2. <a href="http://te-0-0-26.ear2.den1.us.nitelusa.net" target="_blank">te-0-0-26.ear2.den1.us.nitelusa.net</a> 0.0% 14 0.9 1.0 0.8 2.1 0.4</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 3. <a href="http://te-0-0-26.ear1.den1.us.nitelusa.net" target="_blank">te-0-0-26.ear1.den1.us.nitelusa.net</a> 0.0% 14 1.1 1.6 1.1 2.9 0.7</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 4. <a href="http://te-0-0-1-0.cr1.den1.us.nitelusa.net" target="_blank">te-0-0-1-0.cr1.den1.us.nitelusa.net</a> 0.0% 14 1.0 1.0 1.0 1.1 0.0</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 5. <a href="http://ae1-122.cr0-den2.ip4.gtt.net" target="_blank">ae1-122.cr0-den2.ip4.gtt.net</a> 0.0% 14 0.5 1.2 0.3 6.9 2.0</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 6. <a href="http://et-0-0-47.cr3-lax2.ip4.gtt.net" target="_blank">et-0-0-47.cr3-lax2.ip4.gtt.net</a> 0.0% 14 26.5 26.4 26.2 26.7 0.2</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 7. <a href="http://as4134.lax20.ip4.gtt.net" target="_blank">as4134.lax20.ip4.gtt.net</a> 0.0% 14 27.7 28.7 26.8 30.1 1.1</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 8. 202.97.50.29 0.0% 14 31.4 30.6 26.8 34.1 2.4</span></div>
<div><span style="font-family:Consolas,Courier,monospace"> 9. 202.97.41.129 0.0% 14 183.3 187.1 183.3 190.8 2.4</span></div>
<div><span style="font-family:Consolas,Courier,monospace">10. 202.97.94.101 0.0% 14 187.9 188.6 186.1 211.2 6.8</span></div>
<div><span style="font-family:Consolas,Courier,monospace">11. 202.97.94.141 0.0% 13 177.8 180.7 177.2 184.2 2.3</span></div>
<div><span style="font-family:Consolas,Courier,monospace">12. 202.97.67.54 0.0% 13 199.5 201.2 197.4 205.1 2.6</span></div>
<div><span style="font-family:Consolas,Courier,monospace">13. 111.177.110.62 0.0% 13 205.9 206.3 205.9 208.2 0.7</span></div>
<div><span style="font-family:Consolas,Courier,monospace">14. 27.29.128.1 0.0% 13 202.6 202.8 202.5 203.9 0.4</span></div>
<br>
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<p class="MsoNormal"></p>
<p class="MsoNormal">Erik Sundberg</p>
<p class="MsoNormal">Sr. Network Engineer</p>
<p class="MsoNormal">Nitel</p>
<p class="MsoNormal">350 N Orleans Street</p>
<p class="MsoNormal">Suite 1300N</p>
<p class="MsoNormal">Chicago, Il 60654</p>
<p class="MsoNormal">Desk: 773-661-5532</p>
<p class="MsoNormal">Cell: 708-710-7419</p>
<p class="MsoNormal">NOC: 866-892-0915</p>
<p class="MsoNormal">Email: <a href="mailto:esundberg@nitelusa.com" id="m_2202828694271075629gmail-m_3545298425202876015LPNoLP" target="_blank">esundberg@nitelusa.com</a></p>
<p class="MsoNormal">web: <a href="http://www.nitelusa.com" id="m_2202828694271075629gmail-m_3545298425202876015LPNoLP" target="_blank">www.nitelusa.com</a></p>
<br>
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<hr style="display:inline-block;width:98%">
<div id="m_2202828694271075629gmail-m_3545298425202876015divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Zhiyun Qian <<a href="mailto:zhiyunq@cs.ucr.edu" target="_blank">zhiyunq@cs.ucr.edu</a>><br>
<b>Sent:</b> Tuesday, April 16, 2019 1:02:36 PM<br>
<b>To:</b> Erik Sundberg<br>
<b>Cc:</b> Pengxiong Zhu; Zhiyun Qian; Zhongjie Wang; Keyu Man<br>
<b>Subject:</b> Re: Ownership of Routers on Both Ends of Transnational Links</font>
<div> </div>
</div>
<div>
<div dir="ltr">Erik,
<div><br>
</div>
<div>Thanks a lot for the information! This is extremely helpful. We are conducting an analysis on performance/policy-related study on transnational links. We are hoping to submit a paper soon. Will be glad to share all the details once we have a draft!</div>
<div><br>
</div>
<div>Best,<br>
<div>
<div>
<div dir="ltr" class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_signature">
<div dir="ltr">-Zhiyun</div>
</div>
</div>
<br>
</div>
</div>
</div>
<br>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_quote">
<div dir="ltr" class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_attr">On Tue, Apr 16, 2019 at 10:35 AM Erik Sundberg <<a href="mailto:ESundberg@nitelusa.com" target="_blank">ESundberg@nitelusa.com</a>> wrote:<br>
</div>
<blockquote class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div style="direction:ltr">CPE is usually ran by the customer. Some provider do offer managed routers for a fee. Kinda like renting a cable modem from your provider.</div>
<div><br>
</div>
<div><br>
</div>
<div style="direction:ltr">What are your guys trying to accomplish or find out?</div>
<div><br>
</div>
<div style="direction:ltr">Erik</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div><br>
</div>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991ms-outlook-ios-signature">
<div style="direction:ltr">Erik Sundberg</div>
<div style="direction:ltr">Sr. Network Engineer</div>
<div style="direction:ltr">Nitel</div>
<div style="direction:ltr">350 N Orleans Street</div>
<div style="direction:ltr">Suite 1300N</div>
<div style="direction:ltr">Chicago, Il 60654</div>
<div style="direction:ltr">Desk: 773-661-5532</div>
<div style="direction:ltr">Cell: 708-710-7419</div>
<div style="direction:ltr">NOC: 866-892-0915</div>
<div style="direction:ltr">Email: <a href="mailto:esundberg@nitelusa.com" target="_blank">
esundberg@nitelusa.com</a></div>
<div style="direction:ltr">web: <a href="http://www.nitelusa.com" target="_blank">
www.nitelusa.com</a></div>
</div>
</div>
<div> </div>
<hr style="display:inline-block;width:98%">
<div id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991divRplyFwdMsg" dir="dir="ltr""><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Pengxiong Zhu <<a href="mailto:pzhu011@ucr.edu" target="_blank">pzhu011@ucr.edu</a>><br>
<b>Sent:</b> Tuesday, April 16, 2019 12:32 PM<br>
<b>To:</b> Erik Sundberg<br>
<b>Cc:</b> Zhiyun Qian; Zhongjie Wang; Keyu Man<br>
<b>Subject:</b> Re: Ownership of Routers on Both Ends of Transnational Links
<div> </div>
</font></div>
<div dir="ltr">
<div dir="ltr">Thanks a lot!
<div><br>
</div>
<div>Are the Customer Devices managed by Telia or the customer?<br clear="all">
<div>
<div dir="ltr" class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail_signature"><br>
Best,<br>
Pengxiong Zhu<br>
Department of Computer Science and Engineering<br>
University of California, Riverside</div>
</div>
<br>
</div>
</div>
</div>
<br>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_quote">
<div dir="ltr" class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_attr">On Tue, Apr 16, 2019 at 7:43 AM Erik Sundberg <<a href="mailto:ESundberg@nitelusa.com" target="_blank">ESundberg@nitelusa.com</a>> wrote:<br>
</div>
<blockquote class="m_2202828694271075629gmail-m_3545298425202876015x_gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p style="margin-top:0px;margin-bottom:0px">I hope this helps with the breakdown for telia.</p>
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<p style="margin-top:0px;margin-bottom:0px">Telia i think is using /31's for there serial blocks now</p>
<p style="margin-top:0px;margin-bottom:0px">62.115.170.56 (Telia Edge Rotuer)</p>
<p style="margin-top:0px;margin-bottom:0px">62.115.170.57 (Customer Device)</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"><a href="http://chinaunicom-ic-341501-sjo-b21.c.telia.net/" rel="noopener noreferrer" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517LPlnk870894" class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517OWAAutoLink" style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px" target="_blank">chinaunicom-ic-341501-sjo-b21.c.telia.net</a><span style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px">.</span><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"><span style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px"><br>
</span></p>
<p style="margin-top:0px;margin-bottom:0px"><span style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px"><Customername>-<CircuitID>-<POP>-<router>.<a href="http://c.telia.net" target="_blank">c.telia.net</a></span></p>
<p style="margin-top:0px;margin-bottom:0px"><span style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px"><br>
</span></p>
<p style="margin-top:0px;margin-bottom:0px"><span style="font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont;font-size:15px"><br>
</span></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">Customer: ChinaUnicom</span></font></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">Telia Circuit ID's are: ic-123456</span></font></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">POP: SJO (Airport code)</span></font></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">Router: b21</span></font></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px">Doamin:
<a href="http://c.telia.net" target="_blank">c.telia.net</a> "<a href="http://Customer.telia.net" target="_blank">Customer.telia.net</a>"</span></font></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px"><br>
</span></font></p>
<p style="margin-top:0px;margin-bottom:0px"><font face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size:15px"><br>
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<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Erik Sundberg</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Sr. Network Engineer</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Nitel</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">350 N Orleans Street</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Suite 1300N</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Chicago, Il 60654</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Desk: 773-661-5532</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Cell: 708-710-7419</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">NOC: 866-892-0915</p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">Email: <a href="mailto:esundberg@nitelusa.com" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517LPNoLP" target="_blank">
esundberg@nitelusa.com</a></p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal">web: <a href="http://www.nitelusa.com" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517LPNoLP" target="_blank">
www.nitelusa.com</a></p>
<br>
<p></p>
<p class="m_2202828694271075629gmail-m_3545298425202876015x_MsoNormal"></p>
<div></div>
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<hr style="display:inline-block;width:98%">
<div id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517divRplyFwdMsg" dir="ltr">
<font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> NANOG <<a href="mailto:nanog-bounces@nanog.org" target="_blank">nanog-bounces@nanog.org</a>> on behalf of Pengxiong Zhu <<a href="mailto:pzhu011@ucr.edu" target="_blank">pzhu011@ucr.edu</a>><br>
<b>Sent:</b> Monday, April 15, 2019 11:36:45 PM<br>
<b>To:</b> <a href="mailto:nanog@nanog.org" target="_blank">nanog@nanog.org</a><br>
<b>Cc:</b> Keyu Man; Zhiyun Qian; Zhongjie Wang<br>
<b>Subject:</b> Ownership of Routers on Both Ends of Transnational Links</font>
<div> </div>
</div>
<div>
<div dir="ltr">
<div dir="ltr"><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-im"><font color="#000000"><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-im">
<div>
<div dir="ltr" style="color:rgb(34,34,34)"><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-im"><font color="#000000"><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-im">
<div>Howdy folks,</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">We are a group of researchers at UC Riverside conducting some measurement about transnational networks. In particular, we are interested in studying the ownership of routers on the two sides of transnational links. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">We have some concrete questions which we hope someone can shed some light on. <span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_ m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_30 m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr-alert m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_gramm m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_inline_cards m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_run_anim m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-Punctuation m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-only-ins m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-replaceWithoutSep" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-30" style="display:inline;border-bottom:2px solid transparent;background-repeat:no-repeat;color:inherit;font-size:inherit"><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_ m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_31 m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr-alert m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_gramm m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_inline_cards m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_disable_anim_appear m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-Punctuation m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-only-ins m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-replaceWithoutSep" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-31" style="display:inline;border-bottom:2px solid transparent;background-repeat:no-repeat;color:inherit;font-size:inherit">Basically</span></span> when
we send <span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_ m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_859 m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr-alert m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_gramm m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_inline_cards m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_run_anim m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-Grammar m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-only-ins m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-doubleReplace m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-replaceWithoutSep" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-859" style="display:inline;border-bottom:2px solid transparent;background-repeat:no-repeat;font-size:inherit">packets</span> from <span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_ m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_860 m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr-alert m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_gramm m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_inline_cards m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-gr_run_anim m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-Grammar m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-only-ins m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-replaceWithoutSep" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-860" style="display:inline;border-bottom:2px solid transparent;background-repeat:no-repeat;font-size:inherit">US/Canada</span> to
China, through traceroute and the RTT of each hop, we can locate the last hop in the US before the packets enter China (<b>there is a large jump of RTT of 100+ms from this hop onwards</b>). Oftentimes the ownership of such routers is ambiguous.</div>
<div dir="ltr"><br>
</div>
</span>
<div dir="ltr">These hops whose IPs seem to belong to US or European ISPs (<b>according to BGP info</b>) but their reverse DNS names have <i><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_ m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_25 m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr-alert m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_spell m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_inline_cards m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_run_anim m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-ContextualSpelling" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-25" style="display:inline;border-bottom:2px solid transparent;background-repeat:no-repeat;color:inherit;font-size:inherit"><span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_ m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_26 m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr-alert m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_spell m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_inline_cards m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-gr_disable_anim_appear m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-ContextualSpelling" id="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-26" style="display:inline;border-bottom:2px solid transparent;background-repeat:no-repeat;color:inherit;font-size:inherit">chinaunicom</span></span></i> in
it, which is a Chinese ISP. </div>
</font></span>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-adL">
<span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-im"><font color="#000000">
<div dir="ltr">
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-m_-5444955998713831722gmail-m_8029302695426111918gmail_signature">
<div>AS1299 Telia Company AB</div>
</div>
<span class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-im">
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-m_-5444955998713831722gmail-m_8029302695426111918gmail_signature">
62.115.170.57 name = <a href="http://chinaunicom-ic-341501-sjo-b21.c.telia.net/" target="_blank">chinaunicom-ic-341501-sjo-b21.c.telia.net</a>.</div>
</span>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-m_-5444955998713831722gmail-m_8029302695426111918gmail_signature">
62.115.33.230 <span style="color:rgb(34,34,34)">name = </span><a href="http://chinaunicom-ic-302366-las-bb1.c.telia.net/" target="_blank">chinaunicom-ic-302366-las-bb1.c.telia.net</a><span style="color:rgb(34,34,34)">.</span> <br>
</div>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-m_-5444955998713831722gmail-m_8029302695426111918gmail_signature">
213.248.73.190 name = <a href="http://chinaunicom-ic-127288-sjo-b21.c.telia.net/" target="_blank">chinaunicom-ic-127288-sjo-b21.c.telia.net</a>. <br>
</div>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-m_-5444955998713831722gmail-m_8029302695426111918gmail_signature">
<br>
</div>
<div class="m_2202828694271075629gmail-m_3545298425202876015x_gmail-m_-6447118232669228991gmail-m_-6266079290061135517x_gmail-m_3975476226920052932gmail-m_8681639254013145971gmail-m_5589992378986080225m_-3183345251199778734gmail-m_2136248619369274442gmail-m_-4237133297524689392gmail-m_-5444955998713831722gmail-m_8029302695426111918gmail_signature">
AS701 <span style="white-space:pre-wrap">Verizon Business</span> <br>
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152.179.103.254 name = <a href="http://chinaunicom-gw.customer.alter.net/" target="_blank">chinaunicom-gw.customer.alter.net</a>.</div>
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<div dir="ltr">While the following routers, they don't have a reverse DNS name at all, which seem to be uncommon if they were managed by US or European ISPs but quite common for Chinese ISPs.</div>
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<div>AS6453 TATA COMMUNICATIONS (AMERICA) INC <br>
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<div>63.243.205.90</div>
<div>66.110.59.118 </div>
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<div>Can anyone confirm that these are indeed managed by the Chinese ISPs (even though they are physically located in the US according to the traceroute and RTT analysis)?</div>
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Best,<br>
Pengxiong Zhu<br>
Department of Computer Science and Engineering<br>
University of California, Riverside</div>
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