<font><font face="arial,helvetica,sans-serif">Thanks for the post Mirjam</font></font><div><font><font face="arial,helvetica,sans-serif"><br></font></font></div><div><font><font face="arial,helvetica,sans-serif"><br></font></font></div>
<div><font><font face="arial,helvetica,sans-serif">Regarding latency spike - 300ms is a nice number. This is average latency between India and US and I am quite sure STPI AS9430 is not hearing BSNL AS9829 blocks in India (just like many other ISP's) due to misconfiguration from BSNL at that time.</font></font></div>
<div><font><font face="arial,helvetica,sans-serif"><br></font></font></div><div><font><font face="arial,helvetica,sans-serif">STPI is using Tata Comm, Reliance & Airtel for upstream. Most likely they somehow were not exchanging traffic in niXi with BSNL.�</font></font></div>
<div><font><font face="arial,helvetica,sans-serif"><br></font></font></div><div><font><font face="arial,helvetica,sans-serif">In general BSNL seems to be having very much isolated in terms of peering. They peer with multiple tier 1 - Tata, Gblx, At&t but it's seems like more of transit capacity purchase then real peering.</font></font></div>
<div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Forward to paths to Europe and Singapore looks pretty good but reverse path is very very poor due to fact that most of packets return after hitting New York or Los Angles.</font></div>
<div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">E.g forward path to openDNS who is doing anycasting and nearest node is in Singapore:</font></div><div><font face="arial, helvetica, sans-serif"><br>
</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><span style>anurag@laptop:~$ traceroute 208.67.222.222 -A</span><br style><span style>traceroute to 208.67.222.222 (208.67.222.222), 30 hops max, 60 byte packets</span><br style>
<span style>�1 �router.local (192.168.1.1) [AS8151/AS28513] �2.518 ms �3.409 ms �4.115 ms</span><br style><span style>�2 �117.206.176.1 (117.206.176.1) [AS9829] �27.053 ms �28.224 ms �29.389 ms</span><br style><span style>�3 �218.248.169.122 (218.248.169.122) [AS9829] �35.495 ms �38.114 ms �39.288 ms</span><br style>
<span style>�4 �</span><a href="http://115.114.57.165.static-mumbai.vsnl.net.in/" target="_blank" style>115.114.57.165.static-Mumbai.vsnl.net.in</a><span style>�(115.114.57.165) [AS4755] �76.229 ms �77.389 ms �78.378 ms</span><br style>
<span style>�5 �172.31.16.174 (172.31.16.174) [*] �102.700 ms �103.997 ms �106.173 ms</span><br style><span style>�6 �</span><a href="http://ix-4-2.tcore2.cxr-chennai.as6453.net/" target="_blank" style>ix-4-2.tcore2.CXR-Chennai.as6453.net</a><span style>�(180.87.37.1) [*] �223.402 ms �203.658 ms �206.171 ms</span><br style>
<span style>�7 �</span><a href="http://if-5-2.tcore2.svw-singapore.as6453.net/" target="_blank" style>if-5-2.tcore2.SVW-Singapore.as6453.net</a><span style>�(180.87.15.69) [*] �239.135 ms �240.445 ms �242.632 ms</span><br style>
<span style>�8 �</span><a href="http://vlan1807.icore1.svq-singapore.as6453.net/" target="_blank" style>Vlan1807.icore1.SVQ-Singapore.as6453.net</a><span style>�(120.29.215.29) [*] �245.485 ms �259.768 ms �260.764 ms</span><br style>
<span style>�9 �203.208.186.101 (203.208.186.101) [AS7473] �407.914 ms �409.414 ms �410.124 ms</span><br style><span style>10 �203.208.153.110 (203.208.153.110) [AS7473] �405.858 ms �406.540 ms �408.564 ms</span><br style>
<span style>11 �203.208.190.166 (203.208.190.166) [AS7473] �412.533 ms �413.239 ms �413.928 ms</span><br style><span style>12 �* * *</span><br style><span style>13 �* * *</span><br style><span style>14 �* * *</span><br style>
<br style><br style><br style><span style>400ms latency, while it should be as low as 120-130ms.�</span><br style><br style><span style>Forward path from my system to openDNS is like:</span><br style><br style><span style>BSNL AS9829 >> AS4755-Tata >> AS6453-Tata >>�AS7473-Singtel >> OpenDNS-AS36692</span><br style>
<br style><br style><span style>Let's skip AS9829 and checking same route from next network - AS4755 from their looking glass:</span><br style><br style><span style>Router:�TATA COMM DELHI(AS4755)�</span><br style><span style>Site:�TATA COMM DELHI(AS4755)�</span><br style>
<span style>Command:�traceroute 208.67.222.222 as-number-lookup</span><br style><br style><span style>traceroute to 208.67.222.222 (208.67.222.222) from 121.244.139.224, 30 hops max, 40 byte packets</span><br style><span style>1 172.31.17.5 (172.31.17.5) 56.232 ms 49.907 ms 49.865 ms</span><br style>
<span style>2�</span><a href="http://ix-4-2.tcore1.cxr-chennai.as6453.net/" target="_blank" style>ix-4-2.tcore1.CXR-Chennai.as6453.net</a><span style>�(180.87.36.9) 50.788 ms 49.942 ms 49.950 ms</span><br style><span style>3�</span><a href="http://if-3-3.tcore2.cxr-chennai.as6453.net/" target="_blank" style>if-3-3.tcore2.CXR-Chennai.as6453.net</a><span style>�(180.87.36.6) [AS 6453] 82.654 ms�</span><a href="http://if-5-2.tcore1.svw-singapore.as6453.net/" target="_blank" style>if-5-2.tcore1.SVW-Singapore.as6453.net</a><span style>�(180.87.12.53) [AS 6453] 83.601 ms�</span><a href="http://if-3-3.tcore2.cxr-chennai.as6453.net/" target="_blank" style>if-3-3.tcore2.CXR-Chennai.as6453.net</a><span style>�(180.87.36.6) [AS 6453] 82.719 ms</span><br style>
<span style>MPLS Label=464996 CoS=0 TTL=1 S=1</span><br style><span style>4�</span><a href="http://if-2-2.tcore2.svw-singapore.as6453.net/" target="_blank" style>if-2-2.tcore2.SVW-Singapore.as6453.net</a><span style>�(180.87.12.2) [AS 6453] 106.121 ms 90.087 ms 82.476 ms</span><br style>
<span style>5�</span><a href="http://vlan1807.icore1.svq-singapore.as6453.net/" target="_blank" style>Vlan1807.icore1.SVQ-Singapore.as6453.net</a><span style>�(120.29.215.29) [AS 6453] 89.501 ms 87.419 ms 89.912 ms</span><br style>
<span style>6 203.208.186.101 (203.208.186.101) [AS 7473] 85.556 ms 83.610 ms 91.788 ms</span><br style><span style>7�</span><a href="http://ge-3-0-0-0.sngtp-dr2.ix.singtel.com/" target="_blank" style>ge-3-0-0-0.sngtp-dr2.ix.singtel.com</a><span style>�(203.208.151.157) [AS 7473] 84.276 ms 103.993 ms 84.523 ms</span><br style>
<span style>8 203.208.190.166 (203.208.190.166) [AS 7473] 83.971 ms 84.105 ms 85.290 ms</span><br style><span style>9 * * *</span><br style><span style>10 * * *</span><br style></div><div><span style><br></span></div><div>
<span style><br></span></div><div><span style><br></span></div><div><font face="arial, sans-serif">Good latency - thus clearly issue is NOT with Tata Comm here.</font></div><div><font face="arial, sans-serif"><br></font></div>
<div><font face="arial, sans-serif">Looking at reverse path from 2nd network on route i.e Singtel to BSNL from their looking glass:</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif"><br>
</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif"><br></font></div><div><font><font face="arial,helvetica,sans-serif"><div>
traceroute 117.206.176.37</div><div><br></div><div>Type escape sequence to abort.</div><div>Tracing the route to 117.206.176.37</div><div><br></div><div>1 203.208.155.2 0 msec 4 msec 0 msec</div><div>2 <a href="http://ge-0-1-2-0.sngc3-dr1.ix.singtel.com">ge-0-1-2-0.sngc3-dr1.ix.singtel.com</a> (203.208.172.117) 0 msec</div>
<div><a href="http://ge-1-1-4-0.sngc3-dr1.ix.singtel.com">ge-1-1-4-0.sngc3-dr1.ix.singtel.com</a> (203.208.172.169) 0 msec 0 msec</div><div>3 203.208.153.245 4 msec</div><div><a href="http://ge-1-1-3-0.sngtp-dr2.ix.singtel.com">ge-1-1-3-0.sngtp-dr2.ix.singtel.com</a> (203.208.152.21) 4 msec</div>
<div>203.208.152.229 0 msec</div><div>4 <a href="http://so-2-0-2-0.laxow-cr1.ix.singtel.com">so-2-0-2-0.laxow-cr1.ix.singtel.com</a> (203.208.151.118) 180 msec</div><div>203.208.178.186 221 msec</div><div>203.208.154.46 184 msec</div>
<div>5 <a href="http://so-2-0-3-0.plapx-cr2.ix.singtel.com">so-2-0-3-0.plapx-cr2.ix.singtel.com</a> (203.208.149.246) 184 msec 189 msec 184 msec</div><div>6 <a href="http://ge-2-0-0-0.sngc3-dr1.ix.singtel.com">ge-2-0-0-0.sngc3-dr1.ix.singtel.com</a> (203.208.183.38) 180 msec 180 msec 181 msec</div>
<div>7 <a href="http://if-2-2.tcore2.LVW-LosAngeles.as6453.net">if-2-2.tcore2.LVW-LosAngeles.as6453.net</a> (66.110.59.2) [MPLS: Label 433504 Exp 0] 336 msec 345 msec 337 msec</div><div>8 <a href="http://if-1-3.tcore2.NJY-Newark.as6453.net">if-1-3.tcore2.NJY-Newark.as6453.net</a> (64.86.252.58) [MPLS: Label 337184 Exp 0] 328 msec 349 msec 328 msec</div>
<div>9 <a href="http://if-2-2.tcore1.NJY-Newark.as6453.net">if-2-2.tcore1.NJY-Newark.as6453.net</a> (66.198.70.1) [MPLS: Label 341104 Exp 0] 349 msec 324 msec 321 msec</div><div>10 <a href="http://if-4-2.tcore1.L78-London.as6453.net">if-4-2.tcore1.L78-London.as6453.net</a> (80.231.130.33) [MPLS: Label 619459 Exp 0] 332 msec 329 msec 337 msec</div>
<div>11 <a href="http://if-13-0-0-2.mcore3.L78-London.as6453.net">if-13-0-0-2.mcore3.L78-London.as6453.net</a> (80.231.130.30) 336 msec</div><div><a href="http://if-0-0-0.mcore3.L78-London.as6453.net">if-0-0-0.mcore3.L78-London.as6453.net</a> (80.231.130.50) 329 msec</div>
<div><a href="http://if-13-0-0-2.mcore3.L78-London.as6453.net">if-13-0-0-2.mcore3.L78-London.as6453.net</a> (80.231.130.30) 336 msec</div><div>12 <a href="http://ix-2-0-1.mcore3.L78-London.as6453.net">ix-2-0-1.mcore3.L78-London.as6453.net</a> (195.219.144.78) 253 msec 256 msec 252 msec</div>
<div>13 218.248.255.89 245 msec 256 msec 256 msec</div><div>14 218.248.169.121 309 msec 293 msec 296 msec</div><div>15 218.248.169.121 293 msec 297 msec 296 msec</div><div>16 * * *�</div><div><br></div><div><br></div><div>
<br></div><div><br></div><div>Similar problems exist for Europe too. �(not putting data to keep email short, let me know if you need it).</div><div><br></div><div>Thus at the end "ring" is between India & US for packets even when server is in Singapore. Missing k-root node not only increases latency but also puts a complete 360 degree round trip to US.</div>
<div><br></div><div><br></div><div><br></div><div>Thanks.</div><div><br></div><div><br></div><div><br></div></font></font><br><div class="gmail_quote">On Tue, Feb 21, 2012 at 2:31 PM, Mirjam Kuehne <span dir="ltr"><<a href="mailto:mir@ripe.net">mir@ripe.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
As a follow-up, we looked at the connectivity at the K-root instance in Delhi. Please find a short analysis on RIPE Labs:<br>
<br>
<a href="https://labs.ripe.net/Members/emileaben/connectivity-to-the-k-root-instance-in-Delhi" target="_blank">https://labs.ripe.net/Members/<u></u>emileaben/connectivity-to-the-<u></u>k-root-instance-in-Delhi</a><br>
<br>
Kind Regards,<br>
Mirjam Kuehne<br>
RIPE NCC<div class="im"><br>
<br>
On 17/2/12 5:12 PM, Anurag Bhatia wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
Nice report Mirjam<br>
<br>
<br>
Thanks for sharing. I found k-root to be having issues in India multiple<br>
times. Sometimes due to downtime of Delhi node, other time due to messed<br>
up routing which takes off traffic outside India, increasing latency<br>
from 30ms to over 150ms.<br>
<br>
<br>
I am curious to see RIPE probe collected data for the k-root.<br>
<br>
On Fri, Feb 17, 2012 at 9:02 PM, Mirjam Kuehne <<a href="mailto:mir@ripe.net" target="_blank">mir@ripe.net</a><br></div><div class="im">
<mailto:<a href="mailto:mir@ripe.net" target="_blank">mir@ripe.net</a>>> wrote:<br>
<br>
� �[apologies for duplicate mails]<br>
<br>
� �Dear colleagues,<br>
<br>
� �Please see this new article on RIPE Labs describing a tool that<br>
� �visualises the performance of K-root:<br>
<br></div>
� �<a href="https://labs.ripe.net/Members/__csquarce/visualk" target="_blank">https://labs.ripe.net/Members/<u></u>__csquarce/visualk</a><div class="im"><br>
� �<<a href="https://labs.ripe.net/Members/csquarce/visualk" target="_blank">https://labs.ripe.net/<u></u>Members/csquarce/visualk</a>><br>
<br>
� �Kind regards,<br>
� �Mirjam Kuehne<br>
� �RIPE NCC<br>
<br>
<br>
<br>
<br>
--<br>
<br>
Anurag Bhatia<br>
</div><font color="#000000"><a href="http://anuragbhatia.com" target="_blank">anuragbhatia.com</a> <<a href="http://anuragbhatia.com" target="_blank">http://anuragbhatia.com</a>></font><div class="im"><br>
or simply - http://[2001:470:26:78f::5] if you are on IPv6 connected<br>
network!<br>
<br></div>
Twitter: @anurag_bhatia <<a href="https://twitter.com/#!/anurag_bhatia" target="_blank">https://twitter.com/#!/<u></u>anurag_bhatia</a>><br>
Linkedin: <a href="http://linkedin.anuragbhatia.com" target="_blank">http://linkedin.anuragbhatia.<u></u>com</a><br>
<br>
</blockquote>
<br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div><font face="arial, helvetica, sans-serif"><br></font></div><font face="arial, helvetica, sans-serif">Anurag Bhatia<br></font><div></div><div><a href="http://anuragbhatia.com" target="_blank"><font face="arial, helvetica, sans-serif" color="#000000">anuragbhatia.com</font></a><div>
<font face="arial, helvetica, sans-serif">or simply - http://[2001:470:26:78f::5] if you are on IPv6 connected network!</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div></div><div><font face="arial, helvetica, sans-serif">Twitter: <a href="https://twitter.com/#!/anurag_bhatia" target="_blank">@anurag_bhatia</a></font></div>
<div><font face="arial, helvetica, sans-serif">Linkedin: <a href="http://linkedin.anuragbhatia.com" target="_blank">http://linkedin.anuragbhatia.com</a></font></div><br>
</div>