[c-nsp] Network Topology Mapping

[Roland Dobbins]

On Oct 28, 2007, at 3:27 PM, Roger Oliver wrote:

> I'm very interested to hear what others do.

PacketDesign RouteExplorer does good visualizations based upon BGP  
and IGP, and Narus InSight Manager does visualization based upon  
BGP.  There are also tools like lanmap, which watch packets via RSPAN  
in a given locality.

Several of the open source and commercial NMS systems do SNMP-based  
autodiscovery; it's important to test these out and ensure they're  
tuned not to be overly aggressive prior to running the autodiscovery,  
monitor your network while it's taking place, do it during a  
maintenance window, etc.

Some folks use GraphViz with a bit of Perl-fu on their configs to  
generate graphs, too.

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