[TriLUG] Tuning WAN links

[OlsonE at aosa.army.mil]

For load balancing -- FatPipe is also excellent!  

-----Original Message-----
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
Behalf Of Greg Brown
Sent: Wednesday, October 31, 2007 8:27 AM
To: Triangle Linux Users Group General Discussion
Subject: Re: [TriLUG] Tuning WAN links

If your company is dropping that kind of coin you might want to look
into clustering servers behind something like a Big IP F5 load balancer
on the far end.  For tuning the WAN link itself I have had great success
using Packeteer devices.

http://www.f5.com/
http://www.packeteer.com/

On 10/30/07, Shawn Hood <shawnlhood at gmail.com> wrote:
>
> Hey guys...
>
> I've recently had a dedicated gigabit fiber WAN link that runs between

> Rackspace in Dallas and an office in Bethesda, MD dropped in my lap.  
> It's not often (read: ever) that I'm given a high-bandwidth 
> high-latency link to tune.
>
> Here are the basics:
>
> Office in Bethesda
> Catalyst 3560
>     |
> AboveNet POP - Vienna, VA
> Catalyst 6509
>     |
> AboveNet IP/MPLS Backbone
>     |
> AboveNet POP - Dallas, TX
> Catalyst 6509
>     |
> Rackspace - Dallas, TX
> Catalyst 3560
>
>
> I've run iperf between two RHEL4 boxes connected to the 3560s.  The 
> most throughput I've been able to get is ~45mbit by increasing the 
> buffer sizes in /etc/sysctl and using massive window sizes on iperf.  
> I was hoping you guys could point me in the right direction.  I need 
> to do some reading about how to get the most out of this link, and any

> reference would be greatly appreciated.  Will this be a matter of 
> create a Linux router on each end to shape the traffic destined for 
> this link?  Is this something better suited for proprietary technology

> that claims to 'auto-tune' this kinds of links.
> I'm fairly fluent when it comes to talking about this stuff 'in
theory,'
> but
> have yet to get any hands on experience.
>
> Questions, comments, suggestions?
>
> Shawn
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