Creating a visual Map of a network?

[karnaugh at karnaugh.za.net (Colin Alston)]

castellan2004-nsm at yahoo.com wrote:
> I am being tasked to map a network.  In the past I have used nmap to find the systems on the local LAN and remote LANs (same enterprise).
> 
> This time I want to create a visual map of the LAN.  With cheops, I reasonably good results but cannot be documented for managers with certainty. What are some good tools now that will create visual maps of the networks?
> 
> What is the best way to map a network when ICMP echo has been turned off?
> 

I've had success using Scapy (http://www.secdev.org/projects/scapy/) and
tying it into Graphviz. It can do TCP traces too and has all sorts of
built in visualisation options.

And look at the bottom here http://www.secdev.org/projects/scapy/demo.html