RE: Latency Test with www.facebook.com

From: S Moonesamy <sm+mu_at_elandsys.com>
Date: Fri, 06 Nov 2015 12:02:04 -0800

Dear Mrs Quenette,

I am writing to you as Ms Bhujun contacted me to ask for advice about
the reply which she received regarding a latency test to
www.facebook.com. I did a latency test to www.facebook.com by doing
what is known as a "ping". The ping output was:

   PING 31.13.67.36 (31.13.67.36): 56 data bytes
   64 bytes from 31.13.67.36: icmp_seq=0 ttl=87 time=73.047 ms
   64 bytes from 31.13.67.36: icmp_seq=1 ttl=87 time=73.467 ms
   64 bytes from 31.13.67.36: icmp_seq=2 ttl=87 time=73.425 ms
   64 bytes from 31.13.67.36: icmp_seq=3 ttl=87 time=72.709 ms
   64 bytes from 31.13.67.36: icmp_seq=4 ttl=87 time=75.929 ms
   64 bytes from 31.13.67.36: icmp_seq=5 ttl=87 time=72.671 ms
   --- 31.13.67.36 ping statistics ---
   6 packets transmitted, 6 packets received, 0.0% packet loss
   round-trip min/avg/max/std-dev = 72.671/73.541/75.929/1.133 ms

This is the traceroute output:

   traceroute to 31.13.67.36 (31.13.67.36), 64 hops max, 40 byte packets
   1 197.226.208.1 (197.226.208.1) 1.677 ms 1.441 ms 1.399 ms
   2 197.226.251.86 (197.226.251.86) 1.626 ms 1.324 ms 1.782 ms
   3 tengig4-1-fl.telecomplus.net (196.20.254.173) 3.260 ms 3.292
ms 3.633 ms
   4 1.9.241.193 (1.9.241.193) 114.926 ms 72.502 ms 73.134 ms
   5 10.55.41.96 (10.55.41.96) 75.161 ms 77.324 ms 74.875 ms
   6 58.27.120.58 (58.27.120.58) 76.394 ms 79.436 ms 75.763 ms
   7 psw01a.kul1.tfbnw.net (173.252.66.8) 74.205 ms
psw01c.kul1.tfbnw.net (173.252.66.6) 79.109 ms 78.983 ms
   8 msw1ac.01.kul1.tfbnw.net (204.15.21.254) 80.877 ms
msw1ab.01.kul1.tfbnw.net (204.15.22.65) 74.616 ms
msw1ae.01.kul1.tfbnw.net (204.15.21.250) 75.174 ms
   9 edge-star-mini-shv-01-kul1.facebook.com (31.13.67.36) 77.562
ms 76.129 ms 74.840 ms

In your reply to Ms Bhujun, you explained that: "The round trip delay
(PING or latency) is beyond the control of MT due to the fact the
servers are located globally and the routing of traffic is dynamic on
the global Internet backbone". I did not notice any change in
routing between the Mauritius Telecom network and Malaysia during the
last few days. The www.facebook.com server which Orange Mauritius
customers get has 31.13.67.36 as the IP address and there wasn't any
change of IP address.

I would be grateful if Mauritius Telecom could review the explanation
which you sent to Ms Bhujun as it does not explain why the test
result showed a latency which was at least eight times slower than to
the above.

Regards,
S. Moonesamy
Received on Fri Nov 06 2015 - 20:15:02 PST