"HP Procurve" - what? That's a product line, not a switch model. Also, you don't need to use a hub; a L2 switch generally works just fine. The problem is when the switch tries to be too smart about L3 and ends up being too smart for its own good. From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of William Holmes Sent: Wednesday, January 17, 2007 11:55 AM To: isalist@xxxxxxxxxxxxx Subject: [isalist] Network Load Balancing And Network Hardware Recomendations Hello, This is possible a little off topic. We currently use Windows Network Load Balancing for our Exchange and ISA servers. Right now to avoid problems with our network switches I have a hub between the NLB hosts and our Network Switches. This connection is therefore limited to 100MB ½ duplex connections. I have new hardware coming in that I need to use NLB on and I would like to have an optimal configuration. I have taken a look at Microsoft KB 192602 and am looking for further recommendations. Our network switches are HP Procurve. Thanks Bill All mail to and from this domain is GFI-scanned.