Re: [OT] Dalian ISPs?

Adam, Ali:

http://www.citynetchina.net/english/GreatExpectations031029.pdf
Very good reading!

So, if things are now clogged, does this mean:
"Asia-US" connection, 3840 GBPS [2002] is already max'd out??

What ping times would you LIKE to get Beijing-mit.edu - in perfect world??
You get 400-500 ms.  What do you expect?

In other words, is something like this correct:
i.e ping time= 2L/c + normal router response times +  router delays?
L=distance Beijing-Cambridge
c=speed of light in fiber

What is normal?


I've been testing things with:
http://www.linkwan.com/vr/

You think it is reliable tool?

Thanks!

jim


> Jim,
>
> Interconnection between ChinaNet and Sprintlink is always clogged. This
week
> it has been at its worst for this year yet. I am also clocking the same as
> Adam. If you buy a broadband service from a locally competing carrier,
e.g.
> Unicom, be advissed that Unicom's network peers with ChinaNet which is the
> lifeline to anyone wanting to access content outside of China. Whatever
you
> do you will go through a CNC or a China Telecom Network. (Bad) Service
> Guaranteed!
>
> You can get more information on China's networks from www.cnnic.net (they
> have network diagrams and bandwidth breakdowns),
> http://www.citynetchina.net/english/GreatExpectations031029.pdf. Lease a
> line and a 10 meg port on the interlink between China and the US. Might
set
> you back a couple 100 K though.
>
> -Ali
>
>
> -----Original Message-----
> From: blug-tech-bounces-+qp3TudyjKPvfBIPTTProkB+6BGkLq7r@public.gmane.org
> [mailto:blug-tech-bounces-+qp3TudyjKPvfBIPTTProkB+6BGkLq7r@public.gmane.org]On Behalf Of Adam Lowry
> Sent: Sunday, March 07, 2004 11:02 PM
> To: Beijing LUG technical questions and assistance - Publicly posted
> Subject: Re: [blug-tech] [OT] Dalian ISPs?
>
>
> Jim wrote:
> > Hi Ali:
> >
> > I'm still waiting for some kind of response from CNC about their lousy
> > network between Dalian and Beijing.
>
> I'm getting 400-500ms to mit.edu on DSL in Beijing. Traceroute is better
> than yours, but it's the same problem. Here's an excerpt:
>
>   7  202.96.12.37 (202.96.12.37)  7.449 ms  7.237 ms  7.186 ms
>   8  219.158.3.14 (219.158.3.14)  7.516 ms  7.054 ms  7.126 ms
>   9  sl-gw23-ana-1-0.sprintlink.net (144.228.173.249)  491.745 ms
> 487.764 ms  493.701 ms
> 10  sl-bb20-ana-3-3.sprintlink.net (144.232.1.45)  496.404 ms *  458.940
ms
> 11  sl-bb24-ana-13-0.sprintlink.net (144.232.1.138)  495.507 ms  463.220
> ms  484.884 ms
>
> That jump to sprintlink is the big one, and it's happening at the same
> time as yours. I haven't been following the discussion too closely, but
> it looks like the biggest problem might not be in Dalian. That 60-70ms
> ping before the jump to sprintlink is suspect, though.
>
> Adam
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