[mrtg] Re: OT: Overseas Network Connections

[Alan Rader]

We cannot test pings or trace routes all the way, the ISP says their
upstream provider, I think China Netcom blocks this kind of stuff and it
is there policy and they block it both ways.  I think they are one of
the main pipes into China.  If you have time, check out how far you can
get and what you see to ip 211.155.170.161 and let me know.  I get as
far as Sprintlink Asia Pacific Region 203.222.38.42.

>From another location I get stopped at 210.82.1.29 which is China
Netcom.

Thanks


-----Original Message-----
From: Gary Smith [mailto:gary at primeexalia.com] 
Sent: Monday, March 15, 2004 4:39 PM
To: Alan Rader; mrtg at list.ee.ethz.ch
Subject: RE: [mrtg] OT: Overseas Network Connections


Alan, 
 
Some of the things that you might want to try would be to do an extended
ping.  Send a larget packet out and set the wait time to 30 seconds or
so.  See if you are still seeing drops or extended delays.  My full time
job has a T3 from NY to Croyden and SF to Croyden and we see some
horrible latency during different times of the day.  I guess there's
just not enough fiber in the ocean :).  Sometimes the delays are
inevitable.
 
BTW, you should conduct these tests against the external interfaces of
each location and not the VPN portion.  If the external tests are fine
then you probably have a problem with something in your VPN
configuration.  Without more details I really can't comment on it.
 
We have setup a 5 legged VPN with 3 locations in California, 1 in
Florida and Tennessee.  We did it using Linux, poptop and pptpd clients.
3 of the locations are T1's and the other two are low end DSL's (IDSL
actually).  We get latency but never packet loss.
 
In either event I would also contact the remote ISP and raise the issue
with them.  
 
Gary

	-----Original Message----- 
	From: mrtg-bounce at list.ee.ethz.ch on behalf of Alan Rader 
	Sent: Mon 3/15/2004 11:20 AM 
	To: mrtg at list.ee.ethz.ch 
	Cc: 
	Subject: [mrtg] OT: Overseas Network Connections
	
	

	We are opening an office in China (Beijing) and our office
supposedly
	has a E1 to the Internet.  We have setup a site to site VPN and
I don't
	know if this is normal or what, but I think it sucks :(.
Average
	response time is over 300ms and I am seeing about 15% packet
loss.
	Response times and packet loss are jumping up and down
constantly.  Even
	right now when it is 3:00am over there, response times are
around 250ms
	and packet loss is still up and down from %5 - 30%. 
	
	We have a T3 out of our US office that is barely used.  Pings
and
	traceroutes are dropped somewhere in China, I think China Netcom
or
	someone like that. 
	
	Thanks for any help.
	
	
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