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Posted by on April 12, 2005, 11:22 pm
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I am experiencing a weird issue while in Beijing, China. I am
currently at a remote location and need to access a database that is in
the US. Although I have 2 megs of bandwidth, it drops to about 100k
when leaving the country. I have an IPSEC tunnel configured on my PIX
515e to the PIX back in the US. Ping times are around 200-300ms. The
problem is that the bandwidth is not there so my data transfers take a
very long time. I decided to do some testing and found that the ping
times from my office in the US to my Beijing office (not my location)
is also around 200-300ms. I configured a tunnel from my location to
the Beijing office which is about 5 kms away from me. My bandwidth
within China is excellent and ping times are around under 10ms. Once
the tunnel is established though, I get 1200ms pings to my office
basically making it worthless. I have played around with MTU settings,
made sure duplex/speed was correct on all equipment, etc. and can not
figure this out. Any help would be appreciated!
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Posted by Walter Roberson on April 13, 2005, 9:18 am
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:I am experiencing a weird issue while in Beijing, China. I am
:currently at a remote location and need to access a database that is in
:the US. Although I have 2 megs of bandwidth, it drops to about 100k
:when leaving the country.
You have 2 megs of bandwidth to your ISP, but does your ISP have
2 megs of bandwidth to out of the country? Have they -reserved-
2 megs of bandwidth for you out of the country, or are you sharing
with millions of others?
According to the media we see around here, China has very strict
limits on which sites outside China can be accessed, so the
low bandwidth is -plausibly- the result of a government
policy designed to make it difficult/frustrating to access
outside sites. Or it could just be your ISP is too cheap to
pay for real bandwidth share. Or it could be a function of
the fact that internet connections out of China must all pass
through one of a small number of security gateways so that
China may block access to sites that it feels are inappropriate
to access.
--
"Mathematics? I speak it like a native." -- Spike Milligan
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