Traffic dropped after moving to VPS

[redstorm]

Days before, i upgrade my account from the shared hosting to VPS account. There are 3 websites under my account. After moving to the new place, download speed of the websites increased a bit and two of the three website run as well as before. However, traffic for one of the website with .cn extension dropped more than 30%.
As far as i see, there is no change in ranking.
Therefore, i want to know, if anyone else here met similar problem, how did you fix it and etc.

[tedster]

Forgive for asking, but we've had several other threads that talked about traffic - and then it turned out they were talking about ALL traffic and couldn't isolate just the Google Search traffic.

So, here's the question - is it your Google Search traffic that dropped for the .cn domain? And did other traffic remain constant?

[redstorm]

Dear Tedster:
Yep, traffic for other two sites remained constant and only the website with .cn domain dropped in traffic.
Traffic for .cn website mainly comes from google (80%).
There is no change in the number of inbound links and etc.

[goodroi]

hi redstorm,

is your .cn site targeting american or canadian consumers?
is the hosting company in america or canada?
did just your american referrals go down or did your canadian referals also go down?
is this impacting all keywords or are certain keywords taking a bigger percentage hit?

[redstorm]

Dear Googroi:
The hosting company locates in America.
I might have sorted out the problem as quite several people from Japan, Russian, Malaysia said the cn domain was not accessible for them, therefore, i assume it might be a DNS propagation problem. If so, how long will DNS propagation take in the worst occasion? I have changed the websites to new dns for more than 48 hours up to now.

[goodroi]

worst case it can take over a week for all routers to get updated with the new dns. in my experience it usually takes about 24-48 hours for international routers to catch up.

to grossly oversimplify things - the farther the physical distance is, the longer it takes for the dns to update. so it makes sense for your american hosted website to have a dns propagation issue with visitors on the other side of the planet.

[redstorm]

Thank you for your help, goodroi.
We finally sorted out the problem: it was because we missed the A record for name server.
Traffic is jumping now.