TPG routing to Japan (Tokyo) is not optimal (June 2023)

[localjrw]

Once again the routing to Japan is not optimal. Traffic appears to be going from Australia -> USA -> Japan and now takes 280+ msec rather than the normal 160-170 msec. This started around 29/05/2023. 

This has happened in the past. See my article "TPG routing to Japan (Tokyo) is not optimal" from 23-09-2022 10:39 AM for more information.

The issue can easily be seen with a trace route to 47.91.24.239.

When will this resolved?

Thanks.

[BasilDV]

Hi @localjrw 

We'd like to raise this with our Tech team for real time testing and see what we can do to resolve this as soon as possible.

Kindly send us a private message with your account details.

BasilDV

[localjrw]

Hi BasilDV,

Well I have just been told that it is all cool and normal to route traffic to Japan via the USA and that I need to prove to the TPG networking team that it is not. The TPG networking team needs to consult a map - the optimal networking to Japan is not via the USA, it is via the the Japan-Guam-Australia North Cable System.

Way Traffic is going now

The way it should be going.

Cheers,

[david64]

@BasilDV . User pdpanozzo posted the proper routing last December. Looks to be a direct connection to Japan.

https://community.tpg.com.au/t5/Broadband-Internet/TPG-routing-to-Japan-Tokyo-is-not-optimal/m-p/120...

4 8 ms 7 ms 8 ms syd-gls-har-crt3-be-40.tpg.com.au [202.7.173.69]
5 9 ms 7 ms 7 ms syd-gls-har-int2-be100.tpgi.com.au [203.221.3.4]
6 107 ms 115 ms 110 ms ix-xe-1-1-2-0.tcore1.tv2-tokyo.as6453.net [180.87.181.192]
7 108 ms 107 ms 109 ms if-et-15-2.hcore1.ovc-tokyo.as6453.net [120.29.217.10]
8 108 ms 107 ms 107 ms softbank221110034233.bbtec.net [221.110.34.233]
9 * * * Request timed out.
10 157 ms 155 ms 155 ms 101.203.70.86
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 162 ms 161 ms 161 ms 47.91.24.239

Is there a contractual or financial reason for TPG changing the routing?

[Anonymous]

Hi @localjrw ,

Send us your details so we can coordinate this with our Engineering Team for investigation.

Regards,

Hi BasilDV,

Well I have just been told that it is all cool and normal to route traffic to Japan via the USA and that I need to prove to the TPG networking team that it is not. The TPG networking team needs to consult a map - the optimal networking to Japan is not via the USA, it is via the the Japan-Guam-Australia North Cable System.

Way Traffic is going now

The way it should be going.

Cheers,

[localjrw]

Looks like it is resolved now. Trace route to Japan is 166 msec.

[soth]

Hi,

This issue appears to be back again with traffic to Japan routing via USA and is over 300ms (internode nbn customer).

Started again a few days ago, its not an issue with my internet connection, multiple friends on TPG group ISPs are experiencing it.