Well I guessing that you are using citrix desktop then, and let said that you are using more than one database or other client/server app, still' you are using internet to put everything on one network, the two isdn lines are slow by default, try to get something better for those locations, one thing that you can do, is create a High-Availability cluster, and use those servers with a a gigabyte card and the main switch with a gigabyte input, that will gave more bandwidth and better client/server response, and, you need as an addition to distribute better your bandwidth for those locations. and take a look to your firewalls, and use IPSec/vpn tunnel  compression ( WAN load balancing) beside that it is not much that you can do, that make better your internal network(LAN)
I forgot if you have a database use different server for that and check your routers if is possible to add compression hardware that will speed inter locations access too, but with tunnel compression on the traffic manager(internet gateway, assuming that is a computer) will do that too.

Check for some ideas here about High-availability
http://www.howtoforge.com/howtos/high-availability

i hope that you find a solution. or may someone can input better idea

Walter Tocalini
Xtremetechs, LLC


On Thu, Apr 15, 2010 at 4:59 PM, Nathan England <nathan@paysonlinux.org> wrote:
I guess I should have been more specific. I have an internet gateway with a bandwidth monitoring program on it. I am not concerned with internet traffic as it is near 0 ! However, I have several large applications that manage to really chew up some bandwidth, namely citrix... I have over 200 machines spread across 4 locations on 6 T1's and 2 128K ISDN lines. At certain times through the day our network as a whole will get sluggish and I'm trying to figure out why. It is not internet traffic.

On Wed, Apr 14, 2010 at 1:55 PM, Nathan England <nathan@paysonlinux.org> wrote:
Hello Hello,

I'm looking for a program or something that can monitor my network as a whole and tell me which machines are consuming all my bandwidth. Something that I could install on a linux box, plug it into the network and stick it in a corner and check it a week later would be ideal. All the tools I've tried only tell me what the machine itself is consuming, not other things on the network. Any recommendations out there?

Nathan


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