Looking to discuss a routing issue going through NTT's link to JP.
Feel free to contact me off-list with the details.
Kind regards,
Job
We are getting a huge amount of traffic loss while sending to JP. I am
trying to figure out if the problem is with cogent or NTT. Thoughts? Here
is a MTR trace:
login02.bal (0.0.0.0)
Thu Nov 27 01:58:22 2014
Keys: Help Display mode Restart statistics Order of fields quit
Packets Pings
Host
Loss% Last Avg Best Wrst StDev
1. v122-router.bal
0.0% 0.2 0.3 0.2 3.7 0.5
2. netscaler3.bal
0.0% 0.1 0.1 0.1 0.2 0.0
3. gw1.bal.brightcove.com
0.0% 0.6 1.9 0.2 12.4 3.2
4. border1.te9-1.brightcoveinc-2.chg004.pnap.net
2.1% 0.9 2.1 0.4 36.5 6.5
5. core1.te2-2-bbnet2.chg.pnap.net
0.0% 2.1 2.1 1.8 3.5 0.4
6. te0-5-0-33.ccr21.ord03.atlas.cogentco.com
0.0% 1.9 2.5 1.8 16.2 2.5
7. be2003.ccr42.ord01.atlas.cogentco.com
0.0% 2.4 2.5 2.3 3.7 0.3
8. be2157.ccr22.mci01.atlas.cogentco.com
0.0% 14.4 14.3 14.1 17.4 0.5
9. be2133.ccr22.sfo01.atlas.cogentco.com
0.0% 52.0 52.1 51.7 54.0 0.4
10. be2165.ccr22.sjc01.atlas.cogentco.com
23.4% 52.7 52.8 52.6 53.3 0.2
11. be2047.ccr21.sjc03.atlas.cogentco.com
67.4% 53.5 53.5 53.4 53.8 0.1
12. verio.iad01.atlas.cogentco.com
29.8% 53.1 53.2 53.0 54.6 0.4
13. ae-6.r20.snjsca04.us.bb.gin.ntt.net
67.4% 53.3 59.3 53.0 82.3 10.1
14. ae-4.r20.tokyjp05.jp.bb.gin.ntt.net
29.8% 138.2 140.6 138.1 173.9 7.6
15. ae-1.ocn.tokyjp05.jp.bb.gin.ntt.net
69.6% 153.8 153.9 153.8 154.0 0.0
16. 60.37.27.92
97.8% 154.1 154.1 154.1 154.1 0.0
17. 114.147.63.70
36.2% 194.0 167.0 155.0 203.5 16.7
18. 118.23.13.2
63.0% 155.8 155.9 155.8 156.1 0.1
19. 118.23.14.66
100.0 0.0 0.0 0.0 0.0 0.0
20. p3044-ipngnfx01marunouchi.tokyo.ocn.ne.jp
97.8% 150.8 150.8 150.8 150.8 0.0
Seems your MTR sees loss within the Cogent (174) network prior
to reaching the NTT network.
I think you perhaps need cogent assistance?
- Jared
This was resolved off-list. James is now engaging with his supplier.
For future reference: When assistance is needed from NTT, please reach
out directly to noc@ntt.net. That mailbox is guarded 24/7 by good
people.
Kind regards,
Job
Never assume symetric routing (though Im almost old enough to remember
the days of.)
Wish there was some kinda bidirect traceroute protocol widely supported.
Mostly we only have lg's via www if they happen to have been setup for such
occasions 
I know there were a few small projects with this kinda idea, but I am not sure
if any of them really got anywhere.
/kc