Re: [tlug] Network issues Japan -> USA?

["Ian Barwick" <barwick@example.com>]

2008/12/10 CL <az.4tlug@example.com>

Ian Barwick wrote:

Since around 5pm yesterday afternoon (Dec. 9th) I've seen a sudden massive dropoff in *upload* transfer speeds (all protocols), specifically from Japan (Tokyo) to servers located at different, geographically separate facilities within the US operated by the same co-location provider. I haven't got access to any servers at other locations / providers in the US  to compare against. However uploads to the same servers from other locations throughout the world aren't affected and I can access them fine from a server based in Europe.

Download speeds remain normal. The problem manifests itself from various Asahinet and OCN connections in Tokyo. I haven't been able to test and haven't yet had reports from other connections / locations in Japan.

Does anyone have any insights as to what might be happening here?

It was Microsoft Update Tuesday in the US.  Could 30,000,000 machines infected with the Windows virus, all calling home at the same time, have had some impact?

The odd thing is, downloading *from* the US seems to be working fine, which would presumably rule out some sort of Windows update-induced mass congestion. It's uploading *to* the US which is incredibly slow.

A "ping -c 100" from here to one of the US servers returns 11% packet loss

In the meantime it appears someone successfully uploaded a fair amount of data last night from what appears to be a Chiba-based IP address, so maybe it's a Tokyo problem?

Ian Barwick