With plain old Visio, after a lot of sweaty hours, you can have your diagram your way - but you just don’t have that kind of time.
With a tool that can first discover your network, then cranking out a diagram of your network in its view, it is getting better, but you can’t rely on it for your task - after all, tools don’t know what you want.
Technology has advanced. Introducing SmartMap - Dynamic Network Diagram Technology from NetBrain...
Dynamic Network diagrams are created instantly with a few simple inputs from you…
For example, the following network diagram is created by inputting source and destination IP into NetBrain software. The rest is all automatic. This can be very handy when you troubleshoot a slow application.



Network Diagram of Traffic Flow Created On-The-Fly during Troubleshooting

Dynamic network diagram can update itself when your network changed...
In the following example NetBrain detects multiple network changes since the diagram was first created. One more click, NetBrain will re-generate a new diagram for you.



Original Network Diagram


Network Changes Detected By NetBrain
Diagnose performance problem right off a dynamic network diagram...
The following examples shows the performance and connectivity diagnosis launched directly from dynamic network diagrams - you can now quickly pinpoint the problematic device, over-utilized link and even packet loss.

http://www.netbraintech.com/network-diagram/