High latency when accessing NRT(jp) region from west-jp

1

When accessing servers in the NRT region from the western Japan, it seems that the connection is being routed through some edge server in the US.

This is causing the response time of the server to exceed 200ms.
I’ve confirmed that the response time drops to below 50ms when using a free VPN in Japan.
Therefore it would be an issue with the routing from my ISP.

I have attached a traceroute result.
I would appreciate any hints or solutions to address this problem.

$ traceroute 66.241.124.62

 1  192.168.0.1 (192.168.0.1)  1.143 ms  0.574 ms  0.463 ms
 2  oha-mx480-bbbas05.qtnet.ad.jp (218.40.227.156)  1.645 ms  1.915 ms  1.915 ms
 3  211.132.104.33 (211.132.104.33)  1.743 ms
    211.132.104.37 (211.132.104.37)  2.398 ms  2.617 ms
 4  61.203.192.249 (61.203.192.249)  2.650 ms
    61.203.192.245 (61.203.192.245)  1.756 ms
    61.203.192.241 (61.203.192.241)  2.413 ms
 5  61.203.193.126 (61.203.193.126)  17.469 ms
    61.203.193.122 (61.203.193.122)  17.192 ms
    61.203.193.126 (61.203.193.126)  17.356 ms
 6  * * *
 7  * * *
 8  44.18.225.104.ptr.anycast.net (104.225.18.44)  129.732 ms  128.889 ms  128.948 ms
 ...
2

Hi!

Could you dump a full traceroute for me? mtr --report 66.241.124.62 should be all I need to get an answer here. Thanks!

3

Hi, thank you for the quick response!

This is the mtr --report 66.241.124.62 result.

HOST: mask------------------.local Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 192.168.0.1                0.0%    10    1.2   1.0   0.8   1.2   0.1
  2.|-- oha-mx480-bbbas05.qtnet.a  0.0%    10    3.5   5.6   2.1  14.1   4.1
  3.|-- 211.132.104.33             0.0%    10    2.5   2.7   2.2   4.5   0.7
  4.|-- 61.203.192.241             0.0%    10    2.8   2.9   2.4   3.4   0.3
  5.|-- 61.203.193.122             0.0%    10   24.0  18.8  17.5  24.0   2.1
  6.|-- ???                       100.0    10    0.0   0.0   0.0   0.0   0.0
  7.|-- ???                       100.0    10    0.0   0.0   0.0   0.0   0.0
  8.|-- 44.18.225.104.ptr.anycast  0.0%    10  129.0 129.2 128.5 131.5   0.9
  9.|-- 66.241.124.62              0.0%    10  128.5 128.4 128.0 128.8   0.2

I’m not familiar with network stuff, so please let me know if you need additional information.

Thank you!

4

Thanks - I reached out to our network people, the tl;dr is there’s some routing issues on your ISP’s side (they’re preferring routes to lax over nrt), they’re reaching out to try and get it fixed.

5

I see, thank you for looking into it.:bowing_man:
I hope our ISP will take care of it.

6

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