[AusNOG] Looking for someone who has experience with Nextgen VPLS

[Greg M]

Hi Mark,

Unfortunately not a tcp window issue.

Two servers in Perth, both identical configurations of Win2k8 with dual
gigabit links in a team - one server I can get 100Mbps to, the other only
10Mbps (from a 3rd, identical server in Sydney).

Greg

-----Original Message-----
From: Mark Smith
[mailto:nanog at 85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org] 
Sent: Monday, 4 April 2011 9:24 PM
To: Greg M
Cc: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Looking for someone who has experience with Nextgen
VPLS

Hi,

On Mon, 4 Apr 2011 19:07:16 +0800
"Greg M" <gregm at servu.net.au> wrote:

> Hi Noggers,
> 
>  
> 
<snip>

>  
> 
> Happy to receive responses on or off-list, and we are happy to pay for 
> someone either locally in Sydney or in Perth to help diagnose this - 
> as a lot of money is being burnt on this circuit that is not providing 
> consistent speeds. We have raised these issues to both Nextgen and 
> Telstra and they are pointing the finger at our internal network.
> 
>  

Sounds like you might have TCP window problems due to the large bandwidth
delay products. If that is the case, the following should help -

Tuning hosts for network performance
http://www.linuxsa.org.au/meetings/2008-09/linuxsa-network-performance-slide
s.pdf

TCP performance and the Web100 project
http://www.linuxsa.org.au/meetings/2003-09/tcpperformance.screen.pdf

http://www.psc.edu/networking/projects/tcptune/

Regards,
Mark.